Jan 12

QT Installation and Fixing

Panel fixings

Fix the QT® EcoSeries Wall Panel onto timber battens or metal channels with galvanised 75mm x 3.15 or 3.75mm ring shank nails (timber battens only) or 10g x 75mm Class 3 (AS3566) screws (timber or steel battens) with the addition of QT® Buttons in all cases. Panel fixings must be no closer than 50mm but no further than 112mm to the horizontal panel edge and no closer than 50mm to the vertical edge, while normal fixing centres are at 225mm maximum centres. It is essential that the vertical and horizontal butt joints be bonded with polyurethane foam adhesive. Also ensure polyurethane foam adhesive is applied to all batten faces prior to the panel being pushed against them for maximum bonding to the support frame. Panels can be joined off stud, if glued to the abutting panel with polyurethane foam adhesive. QT® EcoSeries Wall Panels can span 225mm as an unsupported cantilever. Panels must span across a minimum of two channels or battens and must be installed in a horizontal stretcher bond pattern. To prevent corrosion from salt aerosols in high corrosion zones, (such as geothermal activity or within a 500m distance from the sea) upgrade fixing screws to class 4 or stainless steel (AS3566).


Timber framing must comply with AS 1684 and steel framing must be designed and constructed in accordance with AS 3623. Minimum distances from end and edge of timber framing members must be observed to avoid splitting. Stud spacing must not exceed 600mm centres. Noggings must be fitted between studs at 1350mm maximum centres.
With a 1.8 m spirit level, check for variations in the frame that are over 6 mm. Large variations negatively affect weather protection or can appear as visual defects under critical light conditions. If the frame is out of plumb, but not structurally defective, consult with the builder or contractor for remediation.

Clip and Channel System

Mechanically fix clips at 600 centres in both directions with 2 – 12g x 25mm Class 3 (AS3566) screws into face of stud. Select appropriate slot and engage channel, ensuring channel is plumb.

w x d (mm)
N1 (W28N), N2 (W33N),
N3 (W41N) and C1 (W41C)
45 x 16 or 28 600mm 600mm
N4 (W50N), N5 (W60N),
C2 (W50C) and C3 (W60C)
45 x 16 or 28 450mm 600mm

Steel Battening System – 40mm Top Hat

Fixing 40mm Metal Battens onto timber studs

Batten Spacing at 600 crs Batten Spacing
at 450 crs
0.55 BMT 0.75 BMT 0.55 BMT
N2 (W33N) 2/3.06×65 DSN 2/3.06×65 DSN 2/3.06×65 DSN
N3 (W41N) 2/3.06×65 DSN 2/3.06×65 DSN 2/3.06×65 DSN
N4 (W50N) 2/3.75×65 DSN 2/3.75×65 DSN 2/3.75×65 DSN
N5 (W60N) 2x Type 17 8-15x25mm Pan 2x Type 17 8-15x25mm Pan
N6 (W70N) 2x Type 17 8-15x25mm Pan


NOTE: For fixing 40mm top hat battens to steel framing 2/10-16×16 self drilling hex head
screws for each connection to top plate, bottom plate and nogging is all that is required for
all wind categories.

Timber Batten System

Mechanically fix H3 treated timber battens to stud with 75mm gun framing nails or 75 x 3.15 or 3.75 ring shanked nails. Galvanised nails are required in H3-CCA treated battens. H3-LOSP treated battens are considered non corrosive.

WindClassification(AS4055) TimberBattenwxd (mm) Framing StudCentresMaximum Batten FixingNail Centres(mm)
N1 (W28N), N2 (W33N),N3 (W41N) and C1 (W41C) 45 x 20 600mm 400mm
N1 (W28N), N2 (W33N),N3 (W41N) and C1 (W41C) 45 x 21-50 600mm 300mm
N4 (W50N), N5 (W60N),C2 (W50C) and C3 (W60C) 45 x 20 450mm 300mm
N4 (W50N), N5 (W60N),C2 (W50C) and C3 (W60C) 45 x 21-50 450mm 200mm

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Jan 11

QT Finishing


Ensure service pipes and wires are fixed or checked into the frame and not laid loose in the extended wall cavity. All materials that are susceptible to deterioration due to plasticiser migration must be protected (check with product manufacturer). Some PVC products or electrical cabling that penetrate the coating system and QT EcoSeries Wall Panel, require a conduit to ensure it is protected. Copper pipes require a sleeve, conduit or tape to prevent contact with the wall panel.


Voids or gaps created by service penetrations through the exterior wall require weatherproofing and or waterproofing. A common method is to inject with expandable polyurethane foam and seal with a long lasting exterior gap sealant to make a weather tight seal. Where practical add a flange or decorative feature over the hole or penetration.


Use an exterior grade weatherproof sealant for exterior wall construction and as a general-purpose gap filling. Apply sealant in accordance to manufacturers recommendations. For a sealant to work effectively, the sealant must be applied as shown in the sketch below, Opening Width (D) x Depth (D/2) half the width. Use backing rod as required. Ensure surfaces are in good condition clean and free from oil, dust, loose materials including old sealant and release agents. Apply masking tape to surfaces where contact with sealant is not required. Tape should be removed before sealant cures. Smooth the surface of the sealant and ensure excess sealant is removed. Refer manufacturers curing or drying times before painting.

Heavy & Frequently Adjusted Fixtures

Heavy items are not to be fitted directly to the QT EcoSeries Wall Panel. They should have their own stand-alone supports or be tied to the supporting wall frame (eg. Clothes lines). Items subject to frequent handling (e.g. Flood-Lights and sensors) require a mounting plate, to be fixed across at least two or more frame studs to give longterm fixing support. The backing plate must be of a material that will offer, long-term weatherproof durability. If the internal lining is
already installed, the mounting plate can be installed externally prior to the installation of the QT
EcoSeries Wall Panel.

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