MASTERBOARD^® is moisture resistant and will not deteriorate in wet or humid conditions. In semi-exposed applications such as eaves, soffits, gable overhangs, porches, awnings and canopies, continuous exposure to atmospheric moisture does not permanently affect its physical properties. MASTERBOARD^® is lightweight for easy handling and installation. It can also be cut or drilled using conventional woodworking tools. The boards, when left un-decorated will not degrade, rot or deteriorate physically.

If painting is required, paint can be applied directly without the need for special preparation such as an alkaline resistant primer. Where large areas of external soffits are to be butt jointed, expansion joints must be provided at 4200mm centres to allow for movement of the building.
 

MASTERBOARD^® has also been used as a backing to vitreous enamel and porcelain enamel panels for many years. Bonding MASTERBOARD^® to the back of the panel ensures that these panels remain flat. MASTERBOARD^® will not warp, swell or decay unlike most plywood or gypsum boards. MASTERBOARD^® has greater resistance too moisture than most plywood or gypsum boards and will not warp, swell or decay. Hence, it is a natural material of choice in continually damp and aggressive environments such as underground tunnels and railway stations.

Galvanised steel angles or timber battens secured to the masonry wall and fascia board. Cross-battens or furring channels are employed and fixed to the L-angle at 610mm centres. However, these are only required where the width of the board exceeds 400mm.

A 9mm thickness of MASTERBOARD^® is recommended in this application. The board should be fastened to the angles, furring channels or timber battens using No. 8 self-tapping screws at 300mm centres. To allows for structural movement, an expansion joint should be used in accordance with the architects' recommendation.

If roofing battens are being used, a MASTERBOARD^® underlay needs only to be tacked into position as batten fixings will properly secure the board when applied. If battens are not used, the MASTERBOARD^® underlay should be fixed with clout or wire nails at 300mm centres.

All joints between boards should, ideally, coincide with rafter positions to prevent sagging at joints. Cross noggins at transverse centres are not necessary unless rafters exceed 900mm centres. It should also be noted that MASTERBOARD^® is NOT a loadbearing material and thus cannot withstand foot traffic. Use crawling boards or keep to the roof battens.

• MASTERBOARD^® is ideal for sheathing to external walls of timber frame construction.





• MASTERBOARD^® is unaffected by moisture and will not rot, degrade or support mould or fungal growth.





• MASTERBOARD^® can also provide racking strength where required, the loading dependent on board thickness and nail patterns used.

• MASTERBOARD^® should be used in conjunction with a proprietary vapour barrier to ensure condensation problems are avoided.





• MASTERBOARD^® is simply nailed or screwed to timber framing comprised of stud dimensions appropriate to meet the requisite loadings. Maximum framing centres 610mm, maximum fixing centres 300mm. Over cladding with timber or fibre cement sidings is possible by affixing the sidings through the MASTERBOARD^® and into the timber framing, in accordance with the siding manufacturer's recommendations.