Description
Crown Rafter Roll 32 is an unfaced, semi-rigid roll of glass
mineral wool with extra high thermal performance.
Application
Crown Rafter Roll 32 is for
insulating between the rafters of pitched roofs of both new build
and existing buildings. It is easy to cut and friction fit between
rafters.
As Crown Rafter Roll 32 is unfaced, it is necessary to add a
separate vapour control layer on the warm side of the insulation.
In accordance with Building Regulation requirements, a 50mm
ventilation path must be preserved behind the insulation where the
underlay has high thermal resistance, for example traditional
roofing felt.
Crown Rafter Roll 32 can be used either as a single or double
layer between rafters, or as the first layer of a two layer system
in combination with Polyfoam Linerboard.
Standards
Crown Rafter Roll 32 is a non-combustible inorganic glass wool,
defined as mineral wool in BS 3533: 1981 and is manufactured in
accordance with BSI Quality Assurance Standard BS EN ISO 9001:
2000.
Durability
Crown Rafter Roll 32 is odourless, rot proof, non-hygroscopic,
does not sustain vermin and will not encourage the growth of fungi,
mould or bacteria.
Environmental
Crown Rafter Roll 32 is free
from CFCs, HCFCs and any other material with ozone depletion
potential in its manufacture and content and represents no known
threat to the environment.
Crown Rafter Roll 32’s
manufacture has a low impact on the environment and is classified
as Zero ODP and Zero GWP.
Vapour Resistance
Crown Rafter Roll 32 allows
water vapour to pass freely through it, therefore allowing the
construction element to breathe.
Crown Rafter Roll 32 is unfaced,
making it necessary to install a separate vapour control layer.
Handling and Storage
Crown Rafter Roll 32 is easy to handle and install, being
lightweight and easily cut to size. It is supplied in polythene
packs which are designed for short term protection only.
For longer term protection on site, the product should either be
stored indoors, or under cover and off the ground.
Crown Rafter Roll 32 should not be left permanently exposed to
the elements.
Product Data
| Thickness
(mm) |
Length
(mm) |
Width
(mm) |
Area(m2/roll) |
Thermal
Conductivity (W/mK) |
Thermal Resistance
(m2K/W) |
| 100 |
4.00 |
1200 |
4.80 |
0.032 |
3.10 |
| 85 |
4.60 |
1200 |
5.52 |
0.032 |
2.65 |
| 75 |
5.25 |
1200 |
6.30 |
0.032 |
2.30 |
| 65 |
6.10 |
1200 |
7.32 |
0.032 |
2.00 |
| 50 |
7.90 |
1200 |
9.48 |
0.032 |
1.55 |
All dimensions are nominal