Knauf Insulation
has launched one of its popular continental products, Crown®
Encapsulated Loft Roll, into the UK insulation market. Covering a
200mm thick layer of glass mineral wool in a soft, polyester fabric
makes handling much easier with – great news for installers –
installation becoming an almost ‘itch-free’ task! And, great news
for designers looking for practical insulation solutions, it’s also
very versatile: it can be used at ceiling joist level to insulate a
cold roof or, with an easy-to-install suspension system under the
rafters, a warm roof.
Crown® Encapsulated Loft Roll is made from a 200mm thick layer of
glass mineral wool covered with a soft, easy-to-handle spunlaced
polyester fabric. A kraft paper and polyethylene vapour control
layer is bonded to one side and this is printed with markings to
help installers measure and cut the roll accurately. Available in
just one convenient size – 5.50m long by 1.20m wide – the product
has a thermal conductivity of 0.040 W/mK and a thermal resistance
of 5.0 m2K/W.
Designed for insulating roofs, Crown® Encapsulated Loft Roll can be
used in a number of ways. To insulate a cold roof it can either be
used between the ceiling joists or, as a second, top-up layer,
across them. To create a warm roof, metal suspension-straps are
screwed to the rafters, the roll cut to size, ‘impaled’ on the
straps and then held in position with retaining clips. The straps
are also designed to enable a plasterboard or timber lining to be
installed should it be required; Knauf ‘C’ Channel clips to the end
of the straps to form a framework for plasterboard or,
alternatively, timber battens can be fitted to receive
tongued-and-grooved boards.
Depending on the exact details of the construction, creating a warm
roof in this way gives an elemental U-value of about 0.20 W/m2K –
exactly as prescribed by ‘Part L’ of the Building Regulations /
Part J of the Scottish Technical Standards for new build roofs
(0.30 W/m2K for refurbished work).
“Encapsulating mineral wool is an obvious thing to do,” said Debra
Green, Knauf Insulation’s Product Manager, at the product’s launch,
“apart from being easier and much more pleasant to use, it also
creates opportunities to design alternative insulation
solutions.”
A comprehensive data sheet – Crown® Encapsulated Loft Roll – is
available on the Knauf Insulation website and gives a wealth of
information about the product and its installation. 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: KR08704.
® Registered Trademark of Knauf Insulation.
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