Jan 11

CSR Hebel Benefits

The many benefits of using Hebel PowerBlocks include:

Solid and strong:

Hebel PowerBlocks are made from Autoclaved Aerated Concrete (AAC), a strong, solid masonry building material with the advantage of being 25% the weight of conventional concrete.

Acoustic Performance: Significantly reduced sound transmission from room-to-room.

Thermal Resistance: Unique thermal properties result in a more stable inside temperature, reducing the energy required to heat and cool your home, thereby reducing energy bills.

Environmentally friendly: 73% less embodied energy and 61% less greenhouse gas emissions than comparative masonry products*. *Source: LCA Report GECA 2006.

Fire Protection: Non-combustible blocks with frameless construction deliver superior fire resistance. Hebel PowerBlock systems also allow you to build right up to your boundary line.

Pest resistance: Not a food source for termites or vermin and no cavity construction liminates the chance of harbouring pests.

Design Freedom: Hebel PowerBlock Wall Systems provide absolute freedom to design and build your ultimate dream home – without compromise.

Technical Support: Competent technical support through Hebel distributors.

Energy Efficiency

The unique combination of thermal resistance and thermal mass make building with Hebel
a smart choice for meeting Australia’s stringent building regulations.

The thermal performance of a building depends on a number of factors such as orientation and size and aspect of windows. The R-Value of walls and floors can significantly affect the energy-rating outcome of dwellings. A 250mm Hebel PowerBlock has 3 times the R-Value of a cavity brick wall (BCA Vol. 2 Figure 3.12.1.3). The use of Hebel in walls and floors will provide increased thermal performance that can allow more

flexibility with other design aspects of a building.

The thermal efficiency of Hebel systems will also reduce the reliance on heating and cooling appliances. The combined effects of running a heater less in winter and fans or air conditioning less in summer can have a big impact on energy costs and the environment.

Single Skin Construction

The AAC masonry constructed from Hebel PowerBlock products is called “Plain Masonry” and the blocks are masonry units referred to as a “Solid Unit”. The type of solid unit is “Autoclaved aerated concrete masonry unit” complying with AS/NZS 4455 – Masonry Units and Segment Pavers.The larger face dimension and being a single skin, Hebel PowerBlock walls are erected quickly when compared to double brick construction.

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Jan 11

CSR Hebel Fire and Acoustic

Fire

Hebel AAC has a BCA Group Number 1. Hebel PowerBlock  walls satisfy BCA2008
Vol.2 Clause 3.7.1.5 (a) (iii) masonry construction and therefore suitable for boundary wall construction on a Class 1 building.

Acoustic

Table 5.1 provides acoustic performance levels for PowerBlock walls. For alternatives and composite wall construction, Table 3.2 are acoustic performance for PowerBlock  systems.

Table 5.1:  Acoustic Performance

   PowerBlock Thickness Rw Rw+ Ctr
100 38 35
150 43 40
250 45 42

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Jan 09

CSR Hebel Construction Notes

General Notes

    • These notes and details are to be read in conjunction with the project’s contract documentation.
    • All materials and workmanship shall be in accordance with this Installation Guide, the current edition of the Hebel® Technical Manual and other Hebel® documentation.
    • Refer to architectural drawings for all setting out dimensions.
    • Do not scale drawings, use written dimensions.
    • Should any omission, penetration, cutting of panels, discrepancy or fault exist, contact the designer immediately for a decision before proceeding with work.
    • All load-bearing walls, bearing on Hebel® floor panels, shall be supported separately in accordance with the project engineer’s design.
    • Hebel® accepts no responsibility for the design or selection of supporting walls, lintels, beams, columns or other structural members.
    • Corrosion protection of all structural steelworks shall be specified by the project engineer or architect.
    • The temporary restraint of walls is the responsibility of the builder or installer.
    • PowerBlocks on site should be protected against rain and water saturation. This can best be achieved by leaving the shrink-wrap cap on the top of pallets and covering the top of blockwork if rain threatens. PowerBlocks should not be laid in the rain.

IMPORTANT

  • Ensure engineering tie-down rods are present and located in accordance with the engineer’s documentation.
  • Ensure control joint locations are marked out in accordance with the engineering documentation.

 Coatings

Table 9.1 details Hebel recommendations for Coating System options for Low Rise and Detached Residential construction to deliver a durable, monolithic appearance.
Hebel and Dulux Acratex have developed coating systems designed specifically for the Hebel AAC substrate and warrant these systems for 7 years. Performance requirements for alternate system options are provided. In such circumstances, the project specifier must satisfy themselves that systems are engineered and suitable for relevant project requirements.
General purpose, site or pre-bagged sand and cement renders must not be used on Hebel PowerBlock™ walls, owing to potential variability and unsuitability of formulation for Autoclaved Aerated Concrete (AAC).

Conventional exterior low build paint systems must not be used, as their ability to accommodate normal expansion and contraction in order to maintain a crack free protective layer is not assured.

Refer to “High Performance Coating Systems” brochure on the website, for more information.

Reinforcing Mesh Installation

Fully meshing all rendered Hebel surfaces using alkali-resistant glassfibre mesh is recommended to assist in maintaining render integrity and minimising consequential cracking.
The minimum requirement is to mesh at corners of wall openings (doors and windows) to minimise corner cracking. The mesh should be embedded into the wet first pass of Hebel
HighBuild.

Linings

Plasterboard can be direct fixed to internal Hebel PowerBlock™ walls. It is recommended that battens be used behind plasterboard linings on the inside surface of external walls. Fibre
Cement sheet linings must be installed on battens.

Table 9.1 Coating systems for Hebel PowerBlock

Primer Acrylic Texture Body Coat Finish Coats
Hebel
Product
Finish
Style
Surface
Aignment
Base
Render or
Levelling
Coat
Product
Description &
Performance
Guide
Dulux
AcraTex
Specification
Product
Description &
Performance
Guide
Dulux
AcraTex
Specification
Product
Description &
Performance
Guide
Dulux
AcraTex
Specification
Comment
PowerBlock Uniform
Sand
Texture
profile
≤3mm Hebel
HighBuild™
(Render)
Relevant to
coatings supplier
recommendations
AcraPrime
501/1
OPTION 1:
1-2mm Acrylic
Texture
Trowel applied
Type: AS4548.4
Polymercontent (dry):
9% min.
Tuscany
orCoventry
Coarse
Elastomeric
Membrane
Type:
AS4548.1
Min DFT:
150 micron
AcraShield
Matt
or
Elastomeric
201
2nd coat
Elastomeric
Membrane
recommended
dependant on
project
complexity
eg. unbroken
broadwall,
scaffolding or
cutting in detail
and coastal areas.
OPTION 2:
Dependant on specifier
approval:
Sponge finishing of Hebel
HighBuild™ to a project
approved standard; plus
Elastomeric Membrane
finishing system.
Elastomeric
Membrane
Type:
AS4548.1
Min. DFT:
250 micron
Elastomeric
201
Hebel
recommends the
installation of
1-2mm Acrylic
Texture Coat over
the render base
coat providing
improved
consistency of
finish, system
flexibility and
durability.

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Jan 09

CSR Hebel Tools and Equipment for Construction

Hebel PowerBlocks can be laid using construction tools/equipment.

String Line – A string line is required to accurately set out and lay Hebel® PowerBlock Walls.

Brick/Blocklaying Profiles – used to gauge the block course are being laid level.

Mixing Bucket – a minimum 20 litre bucket is required for mixing Hebel® Mortar, Hebel® Adhesive and Hebel® HighBuild™ render.

Electric Drill – an electric drill is required to mix the Hebel® Mortar, Hebel Adhesive and Hebel HighBuild render. It is also used to drill clearance holes in the blocks so they can be
placed over the tied down rods where required.

Stirrer – fitted to the electric drill, the stirrer is used to mix the Hebel® Mortar, Hebel Adhesive and Hebel HighBuild render inside the mixing bucket.

Notched Trowel – the notched trowel is used to apply the Hebel® Adhesive to the Hebel® surfaces. The width of the trowel must match the block thickness to ensure the adhesive is applied with full and even coverage.

Rubber Mallet – a rubber mallet is required to ‘tap’ the Hebel® PowerBlocks onto the adhesive and into place.

Spirit Level – required to install the blocks level and plumb.

Hand Saw – a Hebel® handsaw can be used to cut Hebel® PowerBlocks to length and height.

Powered Bandsaw – a bandsaw is ideal for cutting Hebel® PowerBlocks. (perfect when there are many site cuts to be performed).

Hebel® Square – a purpose built square is available for use when marking and cutting Hebel® PowerBlocks.

Steel, Plastic and Timber Trowels – these trowels may be required for the installation of the Highbuild render and texture coatings.

Sanding Float – used to even out inconsistencies in the Hebel® PowerBlock Wall in preparation for render/texture coats.

Hebel® Hand Router – may be used to chase services into solid Hebel® walls.

Circular Saw – (fitted with a diamond blade) may be used to chase services into solid Hebel® walls.

Electric Router – may be used to chase services into solid Hebel® walls.

Crane – may be required to lift large Hebel® Lintels and Hebel® custom floor panels.

Lifting Grabs – required for use in conjunction with crane for lifting Hebel lintels and custom floor panels.

Scaffold – Scaffold is required when building block walls. The amount of scaffold depends on the height of the walls.

Sealant Gun – required to fill the control joints in the Hebel® PowerBlock Walls.

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