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F O R E A V E S & S O F F
I T S
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.
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Gable lining |
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F O R
B A C K I N G
P A N E L S
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. |
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Backing to architectural wall |
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S O F F
I T C O N S T R U C T I O N
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R O O F T I L E U N
D E R L A Y
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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 |
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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 |
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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. |
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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. |
E X T E R N A L W A L L S H E A T H I N G
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MASTERBOARD® is ideal for sheathing to external walls of timber frame construction.
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MASTERBOARD® is unaffected by
moisture and will not rot, degrade or support
mould or fungal growth.
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MASTERBOARD® can also provide racking strength
where required, the loading dependent on board
thickness and nail patterns used.
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MASTERBOARD® should be used in conjunction with a
proprietary vapour
barrier to ensure condensation
problems are avoided.
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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.
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