Jan 03

Water Resistant Plasterboard – wet area applications

BGC Plasterboard designed and developed WR Plasterboard for wet area walls, in residential and commercial buildings, such as bathrooms, laundries, toilets and cleaning room areas.

BGC WR Plasterboard has a low absorption core, eliminates the probability of water wicking, therefore preventing possible damage to the supporting structure and wall finishes.

Water Resistant Plasterboard:

  • Specifically designed for wet areas
  • Has a low absorption core
  • Light blue face for ease of identification
  • Quick and simple to install
Introduction

BGC Water Resistant (WR) plasterboard complies with the requirements of AS2588Gypsum Plasterboard’, (refer CSIRO Test Report DTS 713).

BGC Plasterboard designed and developed WR Plasterboard for wet area walls, in residential and commercial buildings, such as bathrooms, laundries, toilets and cleaning room areas.

BGC WR plasterboard is to be installed in accordance with AS 2589.1; 2007Gypsum Plaster Linings in Residential and Light Commercial Construction – Application and Finishes” and as detailed in AS 3740:2004Waterproofing of Wet Areas within Residential Buildings”.

BGC WR Plasterboard has a light-blue fungal resistant multi-layered facing board for easy identification. It is available in 10mm and 13mm thicknesses with recessed edges, ready for taping and jointing with proprietary water resistant stopping and setting compounds.

BGC WR Plasterboard has a low absorption core, eliminates the probability of water wicking, therefore preventing possible damage to the supporting structure and wall finishes.

Key Benefits

  • Cost effective, drywall wet-area lining system.
  • High serviceability performance board.
  • Dimensionally stable substrate for tiled wall finishes.
  • Ready for decorative paint and thin cover finishes.

Plasterboard Finish Selection

The selection of plasterboard finish in wet areas depends on the desired tiled surfaces and other wall decorations required. Generally, use Class 3 and 4 finishes in wet areas, as detailed in AS 2589.1-2007.

Where tiles are used, the finish can be of a lower standard and where other decoration is required, the standard is higher. BGC Plasterboard recommends the architect’s specifications for the level of finish required.

Early Fire Hazard Indices

BGC WR Plasterboard complies with AS 1530.3:1999

Ignitability                                          – 0
Spread of Flame Index                     – 0
Heat Evolved Index                           – 0
Smoke Developed Index                  – 4

Availability

BGC WR Plasterboard is available in 10mm and 13mm thicknesses, 1200mm and 1350mm wide and in various lengths.

BGC Plasterboard ensures that the range of stock sheet sizes listed are available, however variations may occur in some states.

Sheet Size

THICKNESS
(mm)
WIDTH
(mm)
 SHEET WIDTH (mm)
2400 2700 3000 3600 4200 4800 6000
10 1200 x x x x x x
1350 x x x x x
13 1200 x x x x
1350 x x x

Handling & Storage

Water Resistant Plasterboard should be stacked flat, up off the ground and supported on level, equally spaced (max 450mm) gluts.

Care should be taken to ensure edges of the Water Resistant Plasterboard are not damaged when handling.

Water Resistant Plasterboard should be delivered to site immediately prior to installation to reduce the risk of damage.

Installation

Install and fix BGC WR plasterboard sheets horizontally to minimise the number of joints and to minimise light reflections across the joints.

Cut the BGC WR Plasterboard from the face and snap back away from the score, then cut the back paper face toward the front face.

Use a straightedge for neat straight cuts.

Framing

Install and fix BGC WR plasterboard to timber or Cold Formed Steel (CFS) framing or furring channels, which satisfy the BCA requirements and which have been plumbed true and straight.

NOTE: Timber shall be kiln dried with a moisture content below 16%.

Prior to installing and fixing BGC WR Plasterboard, ensure that the preceding trades have certified, that –

  • Structural movement will not occur (or is minimised) at wall-to-wall and floor-to-wall junctions.
  • All noggings, trims and the like, are correctly installed and fixed for the bath, basins and other fixtures (Noggings are spaced at 600mm maximum centres for 10mm plasterboard and 800mm maximum centres for 13mm plasterboard).
  • All perimeters, corner and control joint flashings are in place and correctly installed.

Fixing

Fix BGC WR Plasterboard sheets horizontally to wall framing and or metal framing, with the bottom sheets first, at 6-10mm clear of the finished floor.

Set out sheets around all wall openings, with cutouts 200mm horizontally and 250mm vertically, to prevent corner cracking.

For untiled walls space fasteners at 600mm maximum centres on internal studs and at 150mm for internal and external corners. See Figure 1.

Press sheets firmly against the frame and fasten along one recessed edge at each framing member.

For all wet areas fasten sheets with corrosion resistant Class 3, or better screws, which comply with AS 3566:

For timber-framing plasterboard nails must comply with AS 2334; 1980 Steel Nails – Metric series and have a minimum Class 3 or better corrosion resistance.

BGC Plasterboard recommends the use of screw fasteners instead of nails.

Table 2- Minimum Screw Fastener Length and Type

SHEET THICKNESS CFS STEELUP TO 0.55 BMT CFS STEEL0.75 TO 1.1 BMT
10 mm 6-9 x 25 NP 6-18 x 25 SDP
13 mm 6-9 x 30 NP 6-18 x 30 SDP

NOTE: When fixing into preservative treated timbers, Class 3 AS 3566.2-2002 coatings of screws and nails are to be used.

NOTE: Do not fix BGC WR Plasterboard with adhesives.

Figure 1 – Sheet Set Out Untiled Areas

Tiled Walls

Position fasteners between 10mm and 16mm from the edge of the sheets at the correct spacing to carry the loads of the tiles.

For walls with tiles 6.5mm thick or 12.5 kg/m2 or less, space fasteners at 200mm maximum centres on the intermediate studs and at 150mm on internal and external corners, butt joints and around openings.

Where tiles are greater than 6.5mm thick or 32 kg/m2, space all fasteners at 100mm maximum centres in the centre of sheets, on internal and external corners, butt joints and around openings.

Tile adhesive should be compatible with the waterproofing membrane.

Pre-Formed Shower Base and External Shower Tray

Preliminary work and detail fixing out is similar for external shower trays and preformed shower bases, as shown in Figure 2.

Install and fix perimeter-flashing angles, at the wall/ floor junction and preformed shower bases or external shower trays, prior to fixing WR plasterboard lining.

Cut and install PVC corner angle, down inside the pre-formed shower base; Figure 8 and fasten to framing at 600m centres, in a staggered pattern.

Seal the lower edge of WR plasterboard sheets, whether cut or not, with a proprietary wet-area acrylic sealant to prevent potential moisture wicking.

Figure 2
Pre-Formed Shower Base and External Shower Tray – cont.
Install and fix sheets to the wall framing 6mm clear of the shower tray up-stand; See Figure 2 and of the mortar bed in the external shower tray.

Caulk the bottom edge of the sheets and the shower base or the mortar bed and around plumbing fixtures with a flexible sealant. See Figures 2 & 3.

Penetrations 

The WR Plasterboard must be cut out to leave a 6 mm gap all round the fixture. This gap must be filled with a mould resistant flexible sealant.

BGC recommends using a hole saw to make a neat cut out for fittings such as taps, shower roses etc. Do not use a hammer.

Additional framing must be installed as required to properly support all fixtures.
Figure 3 – Sealing Penetrations
Insitu Shower Tray
Install and fix perimeter-flashing angles, at the wall/floor junction.

Cut and install PVC corner angle and fasten to framing at 600m centres, in a staggered pattern.
Seal the lower edge of water resistant plasterboard sheets, whether cut or not, with a proprietary wet-area acrylic sealant to prevent potential moisture wicking.

Install and fix sheets to the wall framing, as outlined previously, 6mm clear off the floor.
Form a bond-breaker with closed-cell foam backing rod and masking tape at the bottom edge of the Plasterboard at wall/floor junction, as shown in Figure 4.

Caulk around plumbing penetrations and up the internal corners of the shower with flexible sealant.

Apply a proprietary liquid membrane material to the face of the plasterboard and floor to form an insitu internal shower tray.

Follow the membrane manufacturers’ instructions.

Apply the membrane to the vertical corner to a minimum height of 1800mm from the finished floor surface.

The liquid membrane is to extend 75mm minimum each side of the corner.

Note: Use only insitu membrane materials appraised and approved by recognised authorities.

Figure 4
Shower Over Bath

Preliminary work and fixing out detail is similar for preformed shower bases and in part the insitu tray details, see Figure 13.

Cut and install PVC corner angle, down inside the bath up-stand flange and fasten to framing at 600mm centres, in a staggerd pattern, see Figure 5.

Seal the lower edge of water resistant plasterboard sheets, whether cut or not, with a proprietary wet-area acrylic sealant, to prevent potential moisture wicking.

Install and fix sheets to the wall framing, as outlined previously 6mm clear off the bath up-stand.
Caulk the bottom edge of the sheets and the bath edge around plumbing fixtures with a mould resistant flexible sealant.

Apply a proprietary branded liquid membrane 150mm above the bath edge and wall surround, to a minimum height of 1800mm above the finished floor level and 75mm each side of the corner, see Figure 5 & 13.

Perimeter and Bath Flashing

Vertical corner is to angle finish inside perimeter wall angles and also pre-fabricated shower tray/base, insitu-laid trays or the like Refer Figure 5.

Figure 5

Structural Movements and Control Joints

Buildings and their component parts move over time due to various factors which may lead to building and or system failures if design, materials and installation are not satisfactory.

To minimise the risk of system failure take care when designing, detailing, installing and finishing all aspects of wet areas.

The design of wet areas must take into account any relative movements in the building structure and components, due to loading and temperature and humidity variations and the like. See Figure 6.

Figure 6

In long runs of wall, control joints should be set at 5.4 metres maximum in non-tiled areas, and at 4.2 metres maximum, in tiled areas or at construction joints, which ever is the lesser. Control joints must allow for the differential expansion and contraction between the structure, wall lining and tiles. Control joints, must be constructed with double studs, with a gap to suit the control joint type. Refer Figure 7.

Figure 7

Corner Jointing

Corners are set and finished with paper tapes in wet areas for internal corners, or casing beads for external corners.

However, in wet area construction, corners above pre-formed shower bases, insitu trays and shower over baths situations require special attention to detail, as noted.

Vertical Corner Flashing

In tiled walls, vertical corner flashings finish inside pre-fabricated shower tray/base, insitu-laid trays or the like. Refer Figure 8.

 Figure 8

Jointing

Wet area plasterboard joints must satisfy the BCA requirements and comply with AS 2589.1:2007

All WR plasterboard joints in wet areas must be set with perforated paper tapes and proprietary branded base and flushing compounds such as BGC WR Taping Cement.

The wet area base-coat system is typically a two-coat system under tiled areas and a three-coat system where tiles are not used.

All horizontal, vertical and corner joints and fastener points must, be stopped and set with the same materials, to ensure water resistance across the wall areas.

The use of correct materials, application and sequencing of taping and jointing is important and any deviation may result in joint failure.

Mixing of different proprietary compounds or application of setting type compounds over acrylic drying compounds, may lead to joint failure and will negate any proprietary item warranties.
Only use drying type topping or finishing compounds over water-resistant acrylic drying type base-coat compounds.

NOTE: Do not use setting type compounds over water-resistant acrylic drying type compounds.

Do not use self adhesive tapes.

Table 3 – Tiled Areas

First Coat Tape Second
Coat
Finish Coat
Water
Resistant
Taping
Cement
Paper Tape Water
Resistant
Taping
Cement
None
Required

Table 4 – Tiled Areas: – Non-Wet Areas

First Coat Tape Second
    Coat
Finish Coat
Water
Resistant
Taping
Cement
Perforated
Paper Tape
Water
Resistant
Taping
Cement
None
Required

Table 5 – Non-Tiled Areas: – Finish Coat

First Coat Tape Second
    Coat
Finish Coat
Water
Resistant
Taping
Cement
Paper Tape Water
Resistant
Taping
Cement
Water
Resistant
Taping
Cement

 First Coat and Tape

  • Wipe joint recesses with damp cloth to remove dust from plasterboard face.
  • Fully fill recess evenly with BGC WR Taping Cement.
  • Centrally bed the paper tape into bed coat and cover lightly with BGC WR Taping Cement compound and allow to fully dry.
  • Cover all fastener points with BGC WR Taping Cement compound and allow to fully dry.

 Figure 9

Second Coat

  • Apply the second coat of BGC WR Taping Cement compound, 180mm wide and feather out the edges and allow to fully dry.
  • Apply a second coat to all fastener points, feather out 25mm and allow to fully dry.
  • When the coating compounds are dry, lightly sand all joints and fastener points.

Figure 10

Finish Coat

The finish coat is only required where tiles are not used and another decorative finish is required.

  • Apply a 280mm wide approximate, thin finish coat, centrally over the second coat.
  • Dampen the outer edges with a sponge to feather out the edges of the finish coat and allow to dry.
  • Apply a thin finish coat over all fastener points and feather out 40mm and allow to dry.

Figure 11

Sanding and Finishing

  • Allow joint and fastener point coating compounds to dry for 24 hrs before sanding.
  • For tiled areas lightly sand all joints and fastener points, with 150 grit or with 220 sanding mesh, to remove any high spots.
  • Wipe off excess dust with a slightly damp cloth, prior to the application of tile adhesive, seal coats or decorative finishes.

Figure 12

Australian Standards

The following tables are the specific requirements for Wet Areas taken from the Australian Standards 3740-2004 and are applicable to areas lined with BGC WR plasterboard.

Wet Areas

An area within a building supplied with water from a water supply system and includes bathrooms, showers, laundries and sanitary compartments. Excludes kitchens, bar areas, kitchenettes or domestic food and beverage preparation areas”.

The BCA requires that all wet-area design, construction and materials, do not create unhealthy, dangerous conditions, or damage to building components, caused by dampness, water overflow, infiltration or penetration.

LEGEND:
N/A – Not Applicable / * Including mechanical fixings or fasteners through surface materials / ¥ Wall/floor junctions only / ‡Where floor waste is provided the floor shall be graded to the waste / §If a shower is included in a bath, include the requirements for shower area walls.

Figure 13

Table 6 – Design and Installation for Wet Area Waterproofing AS3740-2004

Vessels or area where the fixture is installed Level of risk Design and installation criteria
Floor Walls Junctions Penetration Figure No.
Shower area High Waterproofed
& drained
Water
resistant
Waterproof Waterproof 14
Bathrooms Medium Concrete &
compressed
fibre cement
sheet flooring
Water resistant‡
N/A Waterproof¥ N/A 13, 15
Areas adjacent to baths & spas§ (applies to all rooms in
which a bath or spa is installed)
Medium Timber floors
including
particleboard,
plywood &
other materials
Waterproof
N/A Waterproof¥ N/A 13, 15
Concrete &
compressed
fibre cement
sheet flooring
Water resistant‡
Water
resistant§
Waterproof¥ Horizontal
surface
Waterproof*
Vertical surface
Water resistant
Timber floors
including
particleboard,
plywood &
other materials
Waterproof
Water
resistant§
Waterproof¥ Horizontal
surface
Waterproof*
Vertical surface
Water resistant
15
Walls adjoining other vessels
(e.g., sink, basin or laundry tubs)
Low N/A Water
resistant
Waterproof¥ Horizontal surface Waterproof*
Vertical surface
Water resistant
Laundries & WCs Low Water resistant‡ N/A Water resistant¥ N/A
Bathrooms & laundries requiring a floor waste in accordance with Volume One of the BCA High Waterproofed
and drained
N/A Waterproof¥ Waterproof where
through the floor,
otherwise N/A

Australian Standards cont.

Figure 14

Table 7 – General Requirements for Extent of Application AS 3740-2004

Vessels or area where the
fixture is installed
Design and installation criteria
Floors & horizontal
surfaces
Walls Wall junctions
& joints
Penetrations Figure No.
  • Shower area Enclosed & hobbed
Waterproof entireenclosed showerarea, including hob

Waterproof to150mm min. abovethe shower floor substrate or 25mm min. above the maximum retained water level and the remainder to be water resistant to a height of 1800mm min. from finished floor level

Waterproof internal & external corners & horizontal joints within a minimum height of 1800mm above the floor level with a minimum width of 40mm either side of junction Seal all penetrations 14
Enclosed & hobbed Waterproof entireenclosed showerarea includingwater stop Waterproof to150mm min. abovethe shower floorsubstrate and the remainder to be water resistant to a height of 1800mm min. from finished floor level
Enclosed & stepped down Waterproof entireenclosed showerarea includingthe stepdown Waterproof to150mm min. abovethe shower floor substrate or 25mm min.above the maximum retained water level and the remainder to be water resistant to a height of 1800mm min. from finished floor level
Enclosed & preformedshower base N/A Water resistant to aheight of 1800mmmin. from finishedfloor level Seal allpenetrations 14
Insert baths N/A for floor underthe bathWaterproof entireshelf area, incorporating a waterstop under the bath lip and project a minimum of 5mm above the tile surface N/A for wallunder the bathWaterproof to150mm above the lip of the bath* N/A for wall underthe bath* Seal all tap & spoutpenetrations wherethey occur in ahorizontal surface 13
Walls adjoining other vessels(e.g., sink, basin or laundry tub) N/A Water resistant toa height of 150mmmin. above vesselif the vessel is within 75mm min. of the wall Where the vesel isfixed to a wall, sealedges for extentof vessel Seal all tap andspout penetrationswhere they occurin a horizontal surface
Laundries & WCs Water resistant toentire floor Seal all wall to floorjunctions with askirting or flashingto 25mm min. above the finished floor level, sealed to the floor Waterproof all wallto floor junctions,where a flashing isused the horizontal leg shall be a minimum of 40mm N/A
Bathrooms & laundriesrequiring a floor waste inaccordance withVolume One of the BCA Waterproof & drainentire floor N/A Seal all wall to floorjunctions with askirting or flashingto 25mm min. above the finished floor level, sealed to the floor Waterproof wherethrough the floor,otherwise N/A

LEGEND: N/A – Not Applicable / * If a shower is included in a bath, refer to the requirements for shower area walls & penetrations ¥ Does not apply to joinery fittings such as vanities.

Figure 15

Table 7 – Continued

Vessels or area where the     fixture is installed Design and installation criteria
Floors & horizontal     surfaces Walls Wall junctions     & joints Penetrations Figure No.
Unenclosed Waterproof entire     shower area Waterproof to       150mm min. above       the shower floor       substrate or 25mm       min. above the       maximum retained       water level and the       remainder to be       water resistant to a       height of 1800mm       min. from finished     floor leve Waterproof internal       and external corners       and horizontal joints       to a minimum height       of 1800mm above       the floor level with       a minimum width       of 40mm either side     of junction Seal all     penetrations 13
Areas outside the shower       area for concrete and       compressed fibre cement     sheet flooring Water resistant to     entire floor N/A Waterproof all wall       to floor junctions,       where a flashing is       used the horizontal     leg shall be a minimum of of 40mm N/A 13
Areas outside the shower area       for timber floors including       particleboard, plywood and     other flooring materials Waterproof     entire floor N/A Waterproof all wall       to floor junctions,       where a flashing is       used the horizontal       leg shall be a     minimum of 40mm N/A
Areas adjacent to baths and       spa*¥ for concrete and       compressed fibre cement     sheet flooring Water resistant to     entire floor Water resistant to a       height of 150mm       min. above vessel       and exposed       surfaces below       vessel lip to floor     level* Seal edges for       extent of vessel       and junction of bath       enclosure with floor.       Where the lip of the       bath is supported       by a horizontal       surface this area       shall be waterproof       for showers over bath       and water resist for     all other cases Seal all tap and       spout penetrations       where they occur       in a horizontal     surface
Areas adjacent to baths and       spas*¥ for timber floors including       particleboard, plywood and     other flooring materials Waterproof     entire floor Water resistant to a       height of 150mm min.       above vessel and       exposed surfaces       below vessel lip to     floor level* Seal edges for       extent of vessel       and junction of bath       enclosure with floor.       Where the lip of the       bath is supported by       a horizontal surface       this area shall be       waterproof for       showers over bath       and water resist for     all other cases Seal all tap and       spout penetrations       where they occur in a horizontal     surface

BGC Plasterboard wishes to acknowledge and recommend treatment and installation of wet areas as per the Australian Standards

 External Alfresco Ceilings

The construction of external entertainment areas attached to Fasteners a dwelling with a lined ceiling in Australia is proving popular. These areas are inherently exposed to much more arduous conditions to that of the rest of the house internally.

Areas that could be included are areas outside the main enclosed living area of a house or similar environment. E.g. carports, garage ceilings, alfresco areas or similar.

Environment

The environments of external ceilings are often severe and can be effected by;-

  • The generally constant high humidity
  • The climate of the region
  • Wind loads
  • Garage Roller Door Vibration
  • Insufficient perimeter support

To overcome potential problems in these areas it is important to consider the following points;-

  • The correct choice and installation of lining materials, fasteners, jointing and coating materials, designed to suit the environments
  • Correct placement and installation of battens and installation methods
  • The design and detail of the structural components and their protection from moisture
  • Final paint decoration

Condensation

  • Surface condensation and wind loads can be the main causes of lining board and jointing system failure. Insufficient protection can lead to the plasterboard distorting as well as potential mould attack.
  • Use sarking or foil backed insulation underneath metal roofing as this is more susceptible to condensation build up than roofing tiles.
  • It is important that ceiling cavity areas are well ventilated to prevent condensation build up, the Installation of eave and gable vents, roof ventilators etc can assist in this.
  • Building materials and systems may be adversely affected by these severe environmental and physical conditions, which if not installed correctly can lead to ceiling failure and or collapse.

Recommended BGC Plasterboard Materials

  • 10mm Water Resistant Plasterboard
  • 13mm Water Resistant Plasterboard
  • 13mm Wet Area Fireboard
  • 16mm Wet Area Fireboard
  • 10mm Moisture Resistant Flameboard

Fasteners

Fasteners used can be screws or nails and must be to Class 3. When fixing BGC Plasterboard to an external ceiling, use fasteners in the 1/3 spacing method using appropriate fasteners & stud adhesive.

Recommended fixing & spacing

Screw fixings:
Plasterboard width # of Screws Position of screws.
1200mm 5 evenly spaced 1 per recess & equally spaced 300mm centres.
1350mm 7 evenly spaced 1 per recess & equally spaced 225mm centres.

Nail fixings:

Plasterboard width # of nails Position of nails.
1200mm 7 evenly spaced 1 per recess & equally spaced 200mm centres.
1350mm 9 evenly spaced 1 per recess & equally spaced 170mm centres.
Installation

All perimeters to have appropriate framing/noggings etc in order to support all sheet edges. Perimeters to be screw fixed only at 300mm centres. The perimeter may be fixed out with timber noggings or metal plasterers angle (Rondo P18) or equivalent. Framing centres to be at a maximum of 450mm.

All flush joints must be back blocked in accordance with AS/NZS2589:2007.

Paper tape must be used in conjunction with setting type base products in the recessed joins. Base and topping to comply with ASTM C475.

Plasterboard sheets to have a minimum 6mm space from perimeter walls. Fascia boards/perimeter beams should continue at least 20mm below the bottom of the plasterboard ceiling or the perimeter wall/ceiling trim.

Painting

Roll or brush on high quality sealer undercoat designed for external application. Use only manufacturer’s recommended external paint for this application.

Level 4 shall be the minimum level finish for plasterboard.
Level 5 is recommended when critical lighting conditions apply.

Considerations

Before lining the building it is prudent to consider the following design and construction issues;-

  • Consideration must be given to the framing, this may vary throughout Australia especially in high wind and coastal areas
  • It is highly recommended to batten out the ceiling with Rondo 16mm metal battens or 16mm Furring Channel or 28mm Furring Channel or equivalent. These are to be fixed on the appropriate direct fix clips.
  • High-pressure differentials across a wall, may cause the wall to bend and move; hence
  • Ensure that wall and ceiling areas do not exceed maximum allowable areas, heights or lengths, and provide movement and or relief control joints where necessary.

Find Out More

Jan 02

Plasterboard and Cornice

BGC Plasterboard is an interior lining material which provides a blemish free, monolithic surface ready for decorative paint and thin cover finishes for both commercial and residential applications.

BGC Plasterboard is manufactured using a gypsum core covered with a linerboard which is wrapped around the gypsum to protect the core.

Complementing its plasterboard sheet range, BGC Plasterboard manufactures a range of cove and decorative cornices which provide a solution for the finishing of joints between walls and ceilings.

BGC Plasterboard:

  • Interior wall lining system
  • Suitable for residential & commercial applications
  • Cost effective
  • Ready for decoration
  • Quick and simple to install
  • Excellent acoustic performance
Product Information

BGC Plasterboard is purpose designed as a complete plasterboard wall and lining system, which complies with the requirements of the Building Code of Australia (BCA).

BGC Plasterboard has been tested by the CSIRO (Manufacturing & Infrastructure Technology) in accordance with AS 2588 – 1998: Gypsum Plasterboard; see report DTS698, April 2003.

BGC Plasterboard interior lining provides a blemish free, monolithic, smooth surface ready for decorative paint and thin cover finishes for homes, offices and institutional buildings.

BGC Plasterboard is to be installed as detailed in AS 2589:2007 ‘Gypsum Linings – Application and Finishes’.

Support framing must conform to the BCA and Australian Standards, be plumb, true and level, prior to the application of the plasterboard, see table 2 page 7. Refer to section 4.2.2 AS2589:2007

BGC Plasterboard may be fixed to timber or CFS (Cold-Formed Steel) light-steel framing or masonry, using plasterboard screws, nails and or adhesive.

Only screws or nails must be used for tiled areas and over existing lining or vapour barriers.

Jointing is effected with Plaster Cement Jointing Compounds and paper tape, to give reinforced crack resistant and seamless surfaces.

Key Benefits

  • Cost effective, easy to install drywall system.
  • Seamless, smooth monolithic appearance.
  • Excellent fire resistance and acoustic performance.
  • High serviceability performance.

Plasterboard Finish Selection

Selecting the level of finish of the interior lining depends on the function of the space, lighting and the desired decorative surfaces required.

For most applications, Finish Levels 4 or 5 are used, as detailed in AS 2589:2007.

Level 3 is used, where heavy to medium texture finishes are applied and the lighting is non-critical.

Level 4 is most commonly used in commercial and residential work, where the finishes are satin, flat or low sheen paint systems and the lighting is non-critical.

For large area walls and ceilings, where critical and severe glancing lighting have an effect, a Level 5 finish must be used to minimize any adverse effects of harsh lighting.

Early Fire Hazard Indices

BGC Plasterboard has been tested by the NATA accredited AWTA for fire resistance in accordance with AS 1530.3; see Report Test Number: 7-518246-CN, April 2003.

Ignitability Index – 13
Spread of Flame Index – 0
Heat Evolved Index – 1
Smoke Developed Index – 3

Sheet Sizes 

THICKNESS(mm) & PRODUCT WIDTH(mm) SHEET WIDTH (mm)
2400 2700 3000 3600 4200 4800 5400 6000
10 Plasterboard 1200 x x x x x x x x
1350 x x x x x
13 Plasterboard 1200 x x x x x x x x
1350 x x x x
10 Ceilingboard 1200 x x x x x x x x
1350 x x x x x x
10 Water ResistantPlasterboard 1200 x x x x x x x
1350 x x x x x
13 Water ResistantPlasterboard 1200 x x x x x
1350 x x x
13 Fireboard 1200 x x x x
16 Fireboard 1200 x x x x
10 Moisture ResistantFlameboard 1200 x x
1350 x
13 Wet Area Fireboard 1200 x
16 Wet Area Fireboard 1200 x x x
10 Soundboard 1200 x x
1350 x
13 Soundboard 1200 x
6.5 Curveboard 1200 x
13 Impactboard 1200 x

Some sizes may not be available in all states, please check with your local BGC Plasterboard office for availability. 

Installation

BGC Plasterboard recommends that this section should be read in conjunction with the architects’ specifications to determine the Level of Finishes.

BGC Plasterboard should be installed after all preceding trades have been completed.

Ceilings should be installed first. BGC Ceilingboard should preferably be fixed with their long edges perpendicular to the windows or light sources, to obviate unwanted light reflections across the joints.

For the walls, BGC Plasterboard sheets should be laid with their long edges horizontal, to minimise the number of joints as well as light reflections across the joints. This is most important when Finish Levels 4 or 5 are specified, as indicated in Table 2 page 7.

BGC Plasterboard may be cut by scoring the face side and snapping back away from the score. Then cut the paper on the second side following the original score line. Neat straight cuts can be made using a straight edge.

The cut edges should be sanded smooth to form clean joints.

Control joints should be set at twelve (12) metres maximum, or at construction joints, which ever is the lesser (refer page 6).

Control Joints

Control joints must be installed in walls and ceilings at a maximum spacing of 12m, or at control/construction joints, whichever is the lesser.

Architectural features, openings, and the like may be used as control joint set out points.

Rondo ‘P35’ or MBS ‘PXJ-30’ are suitable control/ expansion joints.

Control joints are centrally located across the 15mm minimum gap between adjacent BGC Plasterboard sheets, and the flanges nailed at 300mm centres to the framing behind.

Framing

BGC Plasterboard may be fixed to timber, CFS light steel framing or furring channels, which satisfy the BCA requirements and which have been plumbed true and straight.

Timber framing must comply with the requirement of AS1684 ‘National Timber Framing Code’ and AS1720.1&.2 ‘Timber Structures’ and have a moisture content less than 16% at time of lining.

CFS light-steel framing must be in accordance with AS/NZS4600 ‘Cold-Formed Steel Structure Code’, AS3623 ‘Domestic Metal Framing’ and AS1397.

BGC Plasterboard may be fixed to CFS steel framing not exceeding 1.25mm BMT. Framing members must have a 35mm minimum face width for nail fixing and 32mm for screw fixing.

Steel Frame Application

Framing

Frames must be plumbed true and straight, to comply with the degree of finish required of the BGC Plasterboard.

The tolerance deviation over 1.8m spans, along and across members, for 90% of the wall and ceiling framing, shall be as set out in Table 2.

Frame Alignment Deviation – Table 2

LEVEL 3 AND 4 LEVEL 5
Deviation of
90% of area
(mm)
Deviation of
remaining area
(mm)
Deviation of
90% of area
(mm)
Deviation of
remaining area
(mm)
4 5 3 4

Maximum spacing of framing members depends on the structural requirements for the building, in accordance with AS1170 and AS4055, however the maximum allowable spacing for studs, joists, furring channels or battens shall be as set out in the Table 3.

Spacing of Frame Member  – Table 3

THICKNESS
(mm) & PRODUCT
APPLICATION MAX. SPACING
OF FRAMING
MEMBER (mm)
10 Plasterboard Walls 600
Ceilings 450
13 Plasterboard Walls 600
Ceilings 600
10 Ceilingboard Walls 600
Ceilings 600
10 Water Resistant
Plasterboard
Walls 600
Ceilings 450
13 Water Resistant
Plasterboard
Walls 600
Ceilings 600
13 Fireboard Walls 600
Ceilings 600
16 Fireboard Walls 600
Ceilings 600
10 Moisture Resistant
Flameboard
Walls 600
Ceilings 450
13 Wet Area Fireboard Walls 600
Ceilings 600
16 Wet Area Fireboard Walls 600
Ceilings 600
10 Soundboard Walls 600
Ceilings 450
13 Soundboard Walls 600
Ceilings 600
6.5 Curveboard* Walls 450
Ceilings 450
13 Impactboard Walls 600
Ceilings 600

Trimmers are to be used where the main structural members change direction and all openings must be framed.

*Refer to the Curveboard brochure for further information on spacing of framing members as this may change depending on the angle of the curve required.

Adhesive, Nails or Screws

BGC Plasterboard may be fixed to the framing with either adhesive and nails or adhesive and screws as appropriate.

Water-based acrylic gypsum plaster adhesives such as BGC Stud Adhesive, which comply with AS2753, are suitable for fixing BGC Plasterboard to both metal and timber framing

Adhesive fixing is used in conjunction with fasteners, except for wet and tiled areas, fire-rated construction, over vapour-barriers or existing work, where mechanical fasteners, nails or screws only must be used.

The position of daubs of BGC Stud Adhesive ‘O’ and permanent fasteners ‘X’ should be as set out as shown in the Table 4.

Position and Number of Adhesive Daubs and Fasteners Across Sheet – Table 4

SHEET WIDTH
(mm)
WALL INTERNAL
CEILINGS
EXTERIOR
CEILINGS/
GARAGES
1200 XOOOOX XOOXXOOX XOXOXOX
1350 XOOOOX XOOXXOOX XOXOXOX

Ensure that contact surfaces are free from grease, oil, dust or other loose material prior to placing BGC Stud Adhesive daubs (always clean down steel furring before fixing plasterboard sheeting).

Galvanised 2.8mm standard or ring-shank clouts are used to fix the BGC Plasterboard to timber, see Table 5.

Minimum Nail Fastener Length – Table 5

THICKNESS
(mm)
SUBSTRATE MATERIAL
HARDWOOD SOFTWOOD
10 2.8mm x 30mm galvanised nail or
2.8mm x 25mm ring shanked nail
2.8mm x 40mm galvanised nail or
2.8mm x 30mm ring shanked nail
13 2.8mm x 30mm galvanised nail or
2.8mm x 25mm ring shanked nail
2.8mm x 40mm galvanised nail or
2.8mm x 30mm ring shanked nail
16 2.8mm x 40mm galvanised nail 2.8mm x 50mm galvanised nail

A full mechanical fastening system may be necessary in regions experiencing high loads on external ceiling areas such as carports, garages and verandahs.

Framing

Needle-point (NP) or self drilling and tapping point (SDP), bugle-head screws are used to fix to CFS light steel framing, and must comply with AS3566, see Table 6.

Minimum Screw Fastener Length – Table 6

THICKNESS
(mm)
SUBSTRATE MATERIAL
HARDWOOD SOFTWOOD STEEL
SCREW LENGTH mm SCREW GUAGE NO. SCREW LENGTH mm SCREW GUAGE NO. S SCREW LENGTH mm SCREW GUAGE NO
10 25 needle point
(see note 1)
6 30 Type W
(see note 1)
6 25 S point
(see note 1)
6
13 25 needle point
(see note 1)
6 30 Type W
(see note 1)
6 25 S point
(see note 1)
6
16 30 needle point 6 45 Type W 6 20 S point 6
  1. Screws used for fixing plasterboard to timber ceiling substrates (hardwood and softwood) shall have a minimum length of 30mm.
  2. S point screws shall be used for steel thickness less than or equal to 0.75mm base material thickness (BMT).
  3. Drill point screws shall be used for steel thick ness greather than 0.75mm base material thickness (BMT).

Note: When fixing into preservative treated timbers, Class A AS 3566 coatings of screws and nails are to be used.

Fixing to Framing

Walls

Daubs of BGC Stud Adhesive, 25mm diameter x 15mm high are positioned in the pattern as shown in Table 4, spaced at a maximum of 300mm and a minimum of 200mm.

BGC Stud Adhesive must not be used at wall-to-wall and wall-to-ceiling junctions, around openings, butt joints or fastener points.

BGC Plasterboard is placed horizontally along each wall. Sheets to be packed 6-10mm from floor and fastened along the top recessed edge at each stud or furring channel.

The sheets are then pressed firmly against the studs and temporary fastened midway across the sheet at every second stud or furring channel.

Next, fasten the other recessed edge at each stud, or furring channel.

Fasteners must not coincide with BGC Stud Adhesive daubs, and fasteners should be kept to a minimum distance of 200mm from adhesive daubs.

Fasteners around openings should be placed at a maximum spacing of 300mm centres. Allow at least 24 hours for the adhesive to set.

Interior Ceilings

BGC Stud Adhesive, 25mm dia. x 15mm high, are positioned in the pattern as shown in Table 4, spaced at maximum of 250mm and minimum of 200mm centres.

BGC Stud Adhesive must not be used at wall-to-wall and wall-to-ceiling junctions, around openings, butt joints or fastener points.

BGC Ceilingboards are placed at right angles to the ceiling joists, battens or furring channels, and fastened along one recessed edge at each joist, batten or furring channel.

Next, press the sheets firmly against the framing, and fix two nails (for timber framing) or one screw (for CFS steel framing), along the centre of the sheet at each framing member.

Then, fasten off the sheets along the other recessed edge, at each framing member. Fasteners must not coincide with BGC Stud Adhesive daubs, and fasteners should be kept to a minimum distance of 200mm from BGC Stud Adhesive daubs.

Where allowed, fasteners at butt joints and around openings should be placed at a maximum spacing of 150mm for nails and 200mm for screws.

Allow at least 24 hours or 48 hours in slow drying weather, for the BGC Stud Adhesive to cure.

Ceiling Sheet Application

Exterior Ceilings

An exterior ceiling covers areas outside the main enclosed living area of a house such as entertainment areas (Alfresco), carports and garages.

The different environments of exterior ceilings are often severe and can be effected by:

  • The generally constant high humidity,
  • The climate of the region,
  • Wind loads,
  • Garage Roller Door Vibration,
  • Insufficient perimeter support.

To overcome potential problems in these areas it is important to consider the following points:

  • The correct choice and installation of lining materials, fasteners, jointing and coating materials, designed to suit the environments,
  • Correct placement and installation of battens and installation methods,
  • The design and detail of the structural components and their protection from moisture,
  • Final paint decoration.
Condensation
Surface condensation and wind loads can be the main causes of lining board and jointing system failure. Insufficient protection can lead to the plasterboard distorting as well as potential mould attack.
Use sarking or foil backed insulation underneath metal roofing as metal is more susceptible to condensation build up than roofing tiles.
It is important that ceiling cavity areas are well ventilated to prevent condensation build up. The installation of eave and gable vents, roof ventilatiors etc. can assist in this by providing permanent cross flow ventilation.

Building materials and systems may be adversely affected by these severe environmental and physical conditions, which if not installed correctly can lead to ceiling failure and or collapse.

Plasterboard Materials

BGC 10mm and 13mm Water Resistant Plasterboard, 10mm Moisture Resistant Flameboard, 10mm Ceilingboard and 13mm Plasterboard may be used as suitable lining materials in exterior ceiling areas.

Installation

All perimeters must have appropriate framing/noggings etc. In order to support all sheet edges. Perimeters to be screw fixed only at 300mm centres. The perimeter may be fixed out with timber noggings, metal plasterers angle (Rondo P18) or equivalent.

Plasterboard sheets fixed to exterior ceilings must be either mechanically fixed with appropriate screws or using the 1/3 spacing method using appropriate screws and stud adhesive as per AS/NZS 2589:2007. Paper tape must be used in conjunction with setting type base products in the recessed joins. Base and topping to comply with ASTM C475. All trowelled joins to be back blocked in accordance with AS/NZS 2589:2007.

Plasterboard sheets to have a minimum 6-10mm space from perimeter walls.

Fascia boards/perimeter beams should continue at least 20mm below the bottom of the plasterboard ceiling or the perimeter wall/ceiling trim.

Framing centres to be at a maximum of 450mm.

Ceiling Area

For long runs of sheets and or large sheet areas, with set joints, movement control (expansion) joints must occur at maximum prescribed distances.

Generally, set joint areas should not exceed 20m2, with a maximum distance of 3.6m across the sheets and a maximum of 5.4m along the sheets.

1/3 Fixing

Garage Areas

Roller/tilt door operation can result in differential movement due to vibration resulting in positive joint cracking and adhesive breakdown/failure.

While the finish and appearance of these areas remains the same as ceiling in habitable areas additional details are required.

BGC Plasterboard recommends the use of Water Resistant Plasterboard with 1/3 fixings.

  • Screw and glue fix only.
  • Back block all joints.
  • Use of proprietary branded quality sealer prior to painting.
  • Use wet area base coats in jointing system.

Considerations

Before lining the building it is prudent to consider the following design and construction issues:

  • Consideration must be given to the framing, this may vary throughout Australia especially in high wind and coastal areas.
  • It is highly recommended to batten out the ceiling with Rondo 16mm metal battens or 16mm Furring Channel or 28mm Furring Channel or equivalent. These are to be fixed on the appropriate direct fix clips.
  • High-pressure differentials across a wall, may cause the wall to bend and move.

Ensure that wall and ceiling areas do not exceed maximum allowable areas, heights or lengths, and provide movement and or relief control joints where necessary.

  • Decoration is as important as the plasterboard installation and is vital in protecting both plasterboard and the set trowelled areas. The surface of the installed plasterboard ceiling should be decorated with an approved exterior grade paint. Please refer to your paint manufacturer for the appropriate grade required.

Alfresco Coffer Detail

Eaves Details – Casing Bead

Timber Stop

Back Blocking

Back blocking is used to reinforce unsupported butt or recessed joints and must be positioned midway between supporting members, in ceilings and walls.

Back blocking must be used in open areas of ceilings (back of recessed joints) with 3 or more joints and where there is a likelihood of excessive shrinkage and movement in the structure.

Black Blocking Procedure For Recessed Edge Joins

  1. Cut back blocks at least 200 mm wide and long enough to fit between the framing members with a gap not greater than 30 mm at each end.
  2. Apply BGC Back Blocking Cement over the full face of the back block. A notched spreader providing 6 mm × 6 mm beads at approximately 20 mm centres at right angle to the joint would be satisfactory.
  3. Fix the plasterboard to framing members.
  4. Place back blocks centrally along the full length of the board edge.
  5. Immediately after the back blocks are in place, fix the next sheet.

Alternatively, ceilings back blocks may be cemented into position from above the ceiling after the sheets have been fixed and before they are flush jointed.

 Back Blocking Procedure

Jointing Application

Paper tape joints produce stronger and more enduring results than those that are set with fibreglass tapes.

BGC Plasterboard recommends the use of paper tapes.

  • Self-adhesive paper tapes should not be used.
  • Where fibreglass tape joints are used, they must be back

blocked before the joints are set (in accordance with the instructions set out in Back Blocking, page 12).

Tape & First Coat

Apply the BGC Base Coat bedding cement to fully fill the
recess of the joint.

Centrally bed the perforated paper tape into bedding coat and remove any air bubbles. Apply additional cement and cover lightly with BGC Base Coat.

Stop-up all fixing points and apply BGC Base Coat to any damaged areas.

Allow the BGC Base Coat to set and dry for a minimum of 24 hours in damp or humid conditions or 1 hour for setting type cements (or as per compound manufacturer’s recommendation).

Second Coat

Lightly sand the first coat.

Check the Level of Finish required in the architects’ specification, before applying the second coat as detailed in Plasterboard Finish Selection (page 4).

Apply a second coat of BGC Base Coat 180mm wide over the joints, making sure to feather out the edges.

Apply a second coat to all fasteners and damaged areas, feathering out by about 25mm.

Allow the second coat to set and dry for a minimum of 24 hours or 1 hour for setting type cements (or as per compound manufacturer’s recommendation).

Third Coat

Lightly sand the second coat.

Apply a thin finish coat of BGC Top Coat centrally over second coat, after it has set and hardened. Dampen the outer edges of the finish coat, with a sponge to feather out the BGC Top Coat about 280mm approx wide.

Apply a thin final coat of BGC Top Coat over all fasteners and damaged areas.

Sanding and Finishing

Allow the BGC Top Coat to dry at least 24 hours.

Lightly sand smooth with 150 grit paper or with 220 sanding mesh.

Wipe off excess dust with a slightly damp cloth.

BGC Plasterboard will perform to the architects’ specification and the Australian Building Codes, provided all procedures are followed as per the compound manufacturers’ specification.

Decoration

BGC Plasterboard does not recommend spray painting to achieve level 4 or higher finish.

Ensure all stopping of joints and nail holes is completed to AS/NZ 2589:2007.

Brush down area prior to painting to ensure board is free from sanding dust.

Roller apply a proprietary branded quality sealer, to the entire sheet area including joints, followed by two coats of full weight flat acrylic paint.

Choice of colour should be considered carefully – darker colours will exacerbate any defects and highlight any imperfections.

Where high humidity is of concern, ensure the chosen painting system will protect joints from moisture absorption.

Cove Cornice

BGC Plasterboard Cove Cornice is designed to give a clean continuous line at the junction of walls and ceilings, and can be used with confidence on both Plasterboard lining and cement plastered walls alike.

BGC Plasterboard Cove Cornice is made of a plaster core with paper face to complement BGC Plasterboard and Ceilingboard. Cove Cornice should be fixed using BGC Cornice Cement with few special tools required.

The use of a mitre box and hand saw for cutting internal and external corner mitres is recommended.

Cove Cornice Sizes – Table 7

SIZE
(mm)
LENGTH
3000 3600 4200 4800 5400
55 x x x x x
75 x x x x
90 x x x x x

Decorative Cornice

The Decorative Cornice range from BGC Plasterboard adds the finishing touch to the interior décor of your new home or renovation.

Esperance provides a timeless design suiting many different styles of home. The soft undulation of the curve provides a stylish finish to any room.

For the bolder finish, don’t look any further than the Albany decorative cornice. With dramatic steps and bold curves, Albany creates an eye catching feature in a room.

Decorative Cornice

Decorative Cornice Sizes – Table 8

DESIGN SIZE
(mm)
LENGTH mm
4800
Esperance 75 x
Albany 95 x

Fixing

Clean down area where cornice is to be applied, remove any excess render or loose material.

Mark a guide line to suite the bottom edge of the cornice (90, 75 or 55 down) and pre-cut lengths as required.

All corner joints, internal and external, are to be mitred.

Where butt joints are unavoidable, ensure both ends are prepared to align accurately.

Apply (butter) a 10mm bead of cornice cement to both long edges and ends of the cornice.

Locate cornice to guide lines and temporarily block as required.

Fill mitres, cleaning off excess cement as you go.

Remove temporary blocking after BGC Cornice Cement has set.

Apply second topping coat to mitres and joints as required.

Note: only ever butter one length at a time and install immediately.

Contact surface may require damping down prior to fixing cornice, depending on drying conditions.

BGC Plasterboard is a proud Australian owned manufacturer of Plasterboard products.
BGC has state-of-the-art manufacturing facilities in Perth and distribution centres in all states of Australia and in New Zealand.

Our distribution network ensures that our entire product range is readily available in all states of Australia.
BGC has a team of technical specialists who can assist with all specification and design information.

Find Out More

Jan 02

Impactboard Plasterboard

Specialty plasterboard that has fibreglass strands within the product and a heavier paper liner meaning the board is much stronger than standard plasterboard. Impactboard is suitable for use in very high traffic areas where walls are subjected to being knocked.

Features and Benefits

  • Specifically designed for high impact areas.
  • High resistance to soft body impact.
  • Reduced indentations from hard body impact.
  • Equivalent acoustic performance to BGC Soundboard.
  • Stronger that standard 13mm plasterboard.
  • Same installation method as standard plasterboard.
  • Easy to joint and finish.
  • Easy to repair.

Impactboard is suitable for both residential and commercial applications and is especially recommended for high traffic areas such as entrance foyers, corridors, waiting rooms and many more. Impactboard should be considered when lining areas where the wall linings are subject to a lot of passing human traffic or lots of movement of equipment or furniture.

Impactboard is ideally suited for commercial applications such as schools, hospitals, airports and shopping areas and in residential applications for hallways, rumpus rooms and games rooms.

 

Thickness
(mm)
Width
(mm)
Mass
(kg)
Length (mm)
3000 3600
13 1200 11.5 x x

Impact Testing

BGC Impactboard has been subjected to a number of hard and soft body impact testing.
Impactboard was compared against other BGC Plasterboard products.

Impactboard is not intended to withstand deliberate damage or to be installed in areas where heavy moving machinery such as forklift trucks are used.

Find Out More

Dec 30

INTRODUCING BGC ENVIROBOARD

BGC Enviroboard is a brand new plasterboard range from BGC Plasterboard. Manufactured using more recycled content than standard plasterboard, the products within the BGC Enviroboard range do not compromise on performance, giving you an interior lining board that can meet the performance requirements you require but is also more friendly to the environment than standard plasterboard.

Environmentally conscious products are rapidly increasing in demand as more and more people consider their impact on the environment when designing buildings.

The products within the BGC Enviroboard range have been developed to meet that growing need.

BGC AND THE ENVIRONMENT

BGC Plasterboard shares the general community concern for the environment and seeks to reduce its environmental footprint in all aspects of its operations.

Natural gypsum, the principal ingredient of BGC plasterboard is mined locally at Cape Cuvier, Western Australia, which is renowned for having some of the highest purity and finer gypsum particle size in the world.

BGC Plasterboard is lined with 100% recycled paper on both sides.

BGC Plasterboard has set prudent environmental targets for waste minimisation and energy and water use, and is an active participant in environmental reporting through the Energy Efficiency, Waterwise and Emissions reporting programs.

Through strict quality control systems, production waste is minimised and wastage is recycled back into new plasterboard.

GOOD ENVIRONMENTAL CHOICE AUSTRALIA

Good Environmental Choice Australia is an environmental labelling program which aims to provide consumers with the knowledge that the product they are purchasing has met certain environmental performance standard which have been developed and assessed in line with International labelling standards.

Scientifically recognised benchmarks for environmental performance have been developed against which products and services are assessed and evaluated to determine whether the product or service should be awarded the Good Environmental Choice Label.

BGC Enviroboard products have been certified by GECA which means that the products and their manufacturing environment have been evaluated and deemed to comply with the strict
guidelines set by GECA.

BGC ENVIROBOARD COMMERCIAL

BGC Enviroboard Commercial is 13mm thick plasterboard that can be used in wall and ceiling systems, ideal for the more demanding office or commercial environment.

At least 11% of the gypsum contained within BGC Enviroboard Commercial has been recycled and BGC Enviroboard Commercial uses 100% recycled paper liner which is green in colour on the face of the board to assist with identification.

BGC Enviroboard Commercial has been designed to be slightly denser than our standard 13mm plasterboard which will assist with the acoustic performance of the board.

THICKNESS
mm
MASS kg/m2 WIDTH
mm
LENGTH
mm
13 9.5 1200 3600

BGC ENVIROBOARD ULTIMATE

BGC Enviroboard Ultimate has been developed as a total solution interior lining. It is ideally suited for a vast array of applications including areas requiring fire ratings and wet areas such as bathrooms so is ideally suited in partition situations where an FRL (Fire Resistance Level) is required in conjunction with a wet area. Ideal choice for hospitality and health/hospital applications.

As well as having excellent fire and moisture resistance properties BGC Enviroboard Ultimate also has superior acoustic performance properties and impact resistance.

At least 11% of the gypsum contained within BGC Enviroboard Ultimate has been recycled and BGC Enviroboard Ultimate uses 100% recycled paper liner which is green in colour on the face of the board to assist with identification.

THICKNESS
mm
MASS kg/m2 WIDTH
mm
LENGTH
mm
13 9.5 1200 3600

FIRE AND ACOUSTIC INFORMATION

BGC Enviroboard Ultimate has higher acoustic ratings than standard plasterboard and has excellent fire ratings.

STEEL STUDS AT 600MM MAX CENTRES

Side 1 – 1 x 13mm BGC Enviroboard Ultimate
Side 2 – 1 x 13mm BGC Enviroboard Ultimate

FRL STUD DEPTH mm 51 64 76 92 150
CAVITY INFILL Rw/Rw+Ctr
-/60/60 Nil 35/30 36/30 37/31 38/32 40/34
9kg – 50mm Polyester 43/33 44/33 45/35 46/38 48/41
30kg – 75mm Polyester 43/33 45/34 45/35 47/38 49/42
WALL THICKNESS mm 73 86 98 114 172

STEEL STUDS AT 600MM MAX CENTRES

Side 1 – 1 x 13mm BGC Enviroboard Ultimate
Side 2 – 2 x 13mm BGC Enviroboard Ultimate

FRL STUD DEPTH mm 51 64 76 92 150
CAVITY INFILL Rw/Rw+Ctr
-/60/60 Nil 40/34 41/35 41/35 42/37 45/38
9kg – 50mm Polyester 48/36 49/40 51/42 51/43 53/46
30kg – 75mm Polyester 49/36 50/40 51/43 52/43 53/47
WALL THICKNESS mm 70 83 95 111 169

STEEL STUDS AT 600MM MAX CENTRES

Side 1 – 2 x 13mm BGC Enviroboard Ultimate
Side 2 – 2 x 13mm BGC Enviroboard Ultimate

FRL STUD DEPTH mm 51 64 76 92 150
CAVITY INFILL Rw/Rw+Ctr
– /120/120 Nil 44/37 45/39 46/39 47/40 49/42
9kg – 50mm Polyester 53/45 54/46 55/48 55/48 57/51
30kg – 75mm Polyester 54/45 54/46 55/48 56/49 57/52
WALL THICKNESS mm 73 86 98 114 172

STEEL STUDS AT 600MM MAX CENTRES

Side 1 – 2 x 13mm BGC Enviroboard Ultimate
Side 2 – 2 x 13mm BGC Enviroboard Ultimate

FRL STUD DEPTH mm 148 172 204 320
CAVITY INFILL Rw/Rw+Ctr
-/120/120 Nil 50/43 51/43 52/43 55/46
9kg – 50mm Polyester – 1 side 64/55 64/56 65/57 65/59
9kg – 50mm Polyester – 2 side 65/55 65/57 66/58 66/60
30kg – 75mm Polyester – 1 side 66/56 67/57 67/59 68/61
30kg – 75mm Polyester – 2 side 69/58 70/59 70/60 71/63
WALL THICKNESS mm 200 224 256 372

STEEL STUDS AT 600MM MAX CENTRES

Side 1 – 2 x 13mm BGC Enviroboard Ultimate
Side 2 – 2 x 13mm BGC Enviroboard Ultimate

FRL STUD DEPTH mm 70 90 120 140
CAVITY INFILL Rw/Rw+Ctr
-/60/60 Nil 35/30 36/31 37/32 38/33
9kg – 50mm Polyester 40/32 41/35 41/36 41/37
30kg – 75mm Polyester 40/33 41/35 41/36 42/37
WALL THICKNESS mm 102 122 152 172

WARRANTY

BGC warrants its products to be free from defects caused by faulty manufacture or materials. If any of its products are so defective the Company will at its option, repair or replace them, supply equivalent replacement products or reimburse the purchase price. This warranty shall not apply to any loss or consequential loss suffered through or resulting from defects caused by faulty manufacture or materials. Fittings or accessories supplied by third parties is beyond the control of BGC and as such is not warranted by BGC.

Find Out More

Dec 30

The Finishing Touch to Your Walls & Ceilings Cornice – Decorative and Functional

Product Description

Cornice is designed to provide a clean and pleasing finish at the junction of walls and ceilings and it’s the little touches that can make your room feel special.

The Decorative Cornice range from BGC Plasterboard adds the finishing touch to the interior décor of your new home or renovation.

Look at what Decorative Cornice can do to the appearance of a room.

Speak to your builder about upgrading from standard cove cornice to one of our Decorative Cornices.

BGC Esperance

BGC Esperance provides a timeless design suiting many different styles of home. The soft undulation of the curve provides a stylish finish to any room.

  • 75mm profile
  • An attractive wave effect
  • Available in 4.8m lengths

BGC Albany

For the bolder finish, don’t look any further than the BGC Albany decorative cornice. With dramatic steps and bold curves, BGC Albany creates an eye catching feature in a room.

  • 95mm profile
  • Bold and stylish
  • Can be retro fitted over existing 55mmm cove
  • Available in 4.8m lengths

BGC Denmark

With symmetrical lines and steps BGC Denmark provides a contemporary look for this cornice profile. The sharp angles of the steps will create a bold focal point to your room.

  • 75mm profile
  • Contemporary design
  • Available in 4.8m lengths

Find Out More

Dec 30

Flexible Plasterboard CurveBoard Design Freedom and Flexibility

CurveBoard is the ideal solution for creating curves on interior walls and ceilings, giving endless design freedom and flexibility. CurveBoard provides another option in the creation of interior spaces.

Designed as a complete plasterboard wall and ceiling lining system which provides a flat, blemish free and monolithic surface which is ready for decoration. CurveBoard is designed to bend to a tight radii without prior wetting.

CurveBoard Plasterboard:

  • provides design flexibility and freedom
  • enables construction of contoured walls or ceilings
  • allows bending to small radii
  • has recessed edges on long edges to provide a continuous surface once flushed
  • saves time and money on installation requiring curved surfaces
  • lightweight and easy to install
  • can be easily applied to timber or light-steel framing
  • can be easily finished in a number of finishes

Product Description

CurveBoard flexible plasterboard enables the creation of curves on internal walls and ceilings. CurveBoard is manufactured as 6.5mm thick plasterboard enabling the plasterboard to bend to tight radii without prior wetting.

CurveBoard is purpose designed as a complete plasterboard wall and ceiling lining system which complies with the requirements of the Building Code of Australia (BCA).

CurveBoard provides a flat, blemish free, monolithic, smooth surface ready for decoration.

CurveBoard can be fixed to timber or CFS (Cold Formed Steel) light-steel framing using plasterboard screws or nails.

Applications

CurveBoard is suitable for creating curved surfaces on internal walls and ceilings.

CurveBoard is available in a sheet size of 3600mm x 1200mm x 6.5mm.

Advantages

  • Provides flexibility and freedom to construct contoured walls or ceilings
  • Allows bending to small radii
  • Has recessed edges on long edge to provide a continuous surface once flushed
  • Saves time and money on installations requiring curves
  • Lightweight and easy to install
  • Can be easily applied to timber or light-steel framing

Performance

BGC CurveBoard must be installed in accordance with the requirements of Australian Standard AS 2589:2007 – Gypsum Linings – Application and Finish.

Wetting of CurveBoard is only required when an extremely tight radii is required or where temperature and humidity are very low.

Horizontal Fix Convex

Framing

CurveBoard may be fixed to timber, CFS light-steel framing or furring channels, which satisfy the BCA requirements and which have been plumbed true and straight.

Timber – 

Timber framing must comply with the requirements of AS1684.1, AS1684.2, AS1684.3, AS1684.4, AS1720.1, AS1720.2 or the BCA.

Light-Steel –

CFS light-steel framing must be in accordance with AS4600 Cold Formed Steel Structure Code, AS3623-1993 Domestic Metal Framing and AS1397-2001. CurveBoard may be fixed to CFS steel framing but must not exceed 1.25mm BMT.

Fasteners

BGC recommends the following fasteners are used:
For Softwood – 25 x 2.8mm
For Timber Framing – 32mm x No.6 Type W
For Lightweight Steel Framing and Furring Channel up to 0.8mm thickness – 25mm x No.6 Type S Needle Point.
For Loadbearing Steel framing 0.8 to 1.2mm thickness – 25mm x No.6 Type S Drill Point
Always ensure that screw guns are adjusted to the appropriate depth.

Table 1 – Maximum Curve Radius & Minimum Curve Radius

Sheets Installed Vertically
Application Min
    Radius
Max
    Spacing
Convex 250mm 250mm 125mm
Concave 450mm 450mm 150mm

 

Sheets Installed Horizontally
Application Min
Radius
Max
Spacing
Convex 250mm 450mm 200mm
Concave 450mm 650mm 200mm

 

Installation

Fasteners should be positioned 10-15mm from edges of the sheet and the head should be slightly below the surface of the plasterboard. Care should be taken to avoid damage to the face of the sheet.

Two layers of CurveBoard  are recommended for most applications with the 2nd layer staggered by at least 200mm to avoid joint alignment.

CurveBoard may be attached horizontally or vertically depending upon the framing support and application, however BGC Plasterboard recommend fixing in a horizontal direction which enables CurveBoard to bend easier.

The maximum stud spacing will depend upon the radius required. Additional studs are usually required to support a tight radius. Please refer to diagrams for recommended spacing.

Finishing

CurveBoard can be finished with several different finishes depending upon the function of the space, lighting and the desired decorative surface required. Finish Levels 4 and 5 are used as detailed in AS2589:2007

The use of a preparatory sealer over the entire surface is recommended prior to application of finish.

Storage and Handling

Care should be taken to ensure edges of CurveBoard are not damaged when handling.
CurveBoard should be delivered to site immediately prior to installation to reduce the risk of damage.
CurveBoard should be stacked flat, up off the ground and supported on equally spaced level gluts.

Warranty BGC Plasterboard

BGC warrants its products to be free from defects caused by faulty manufacture or materials. If any of its products are so defective the Company will at its option, repair or replace them, supply equivalent replacement products or reimburse the purchase price.

This warranty shall not apply to any loss or consequential loss suffered through or resulting from defects caused by faulty manufacture or materials.

Fittings or accessories supplied by third parties is beyond the control of BGC and as such is not warranted by BGC.

Find Out More