Knauf Insulation’s Polyfoam® Supadeck® Insulation Board is a unique
product designed to solve that common headache: installing loft
decking in an attic roof space. Supadeck is a laminated board made
by bonding high-strength Polyfoam extruded polystyrene to a sheet
of flooring grade chipboard. It provides the secondary layer of
insulation and the decking itself – all in one piece. It’s loft
decking made really easy!
Roof construction usually features 100mm deep ceiling joists but,
to achieve an Elemental U-value of 0.16 W/m2K – and satisfy ‘Part
L’ of the Building Regulations / Part J of the Scottish Technical
Standards – a 270mm thick layer of glass mineral wool insulation is
needed. The maths are simple: if the loft is to be decked for
storage purposes, cross joists will have to be installed to raise
the decking above the second, top-up layer of insulation that will
have to be added. But, despite being a common problem, no solution
has been available to make life easy so, for many, it’s still a
time consuming, awkward and expensive job to do.
But not with new Supadeck® Insulation Board! Supadeck is a unique
laminate formed by bonding high-strength Polyfoam extruded
polystyrene to a sheet of P5, flooring grade chipboard. Doing so
makes it much more than ‘just’ loft decking because, apart from the
deck, it also provides the top-up layer of insulation and does away
with the need for supporting cross joists. And, when installed over
a 100mm thick layer of Crown® mineral wool laid between the
ceiling’s existing joists, the combination achieves a U-value of
0.16 W/m2K.
Supadeck comes in one manageable size; 1200mm x 600mm, which means
boards fit through all but the smallest loft hatches and are easy
to handle within the confines of a roof-space. All four edges are
tongued-and-grooved to allow the boards to interlock and form a
flat deck of uniform strength. And installing Supadeck is a doddle!
The boards are laid across the ceiling joists, the edges glued and
the boards fixed to the joists with 150mm screws.
“Supadeck is a great time and labour saving product,” said Mark
Thompson, Knauf Insulation’s Foam Market Development Manager, “…it
does away with the need for cross joists and combines the two key
components needed – the top-up layer of insulation and the decking
surface itself – in one, unique product which makes loft decking so
much easier and quicker to install.”
To support the Polyfoam range, Knauf Insulation have published a
comprehensive brochure – the Knauf Polyfoam Guide – along with a
series of product specific datasheets that contain a wealth of
information and make for essential reading. Advice is also
available from the Knauf Insulation Technical Advisory Service on
01744 693885.
For more details about Knauf Insulation products, or to obtain
copies of their literature, please visit www.knaufinsulation.co.uk
or call 08700 668 660 quoting ID: PR09804.
® Registered Trademark of Knauf Insulation
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