Description
DriTherm Cavity Slabs are semi-rigid or rigid slabs of
non-combustible, glass mineral wool with a water-repellent
additive. They are 455mm wide to suit standard vertical wall tie
spacings, ensuring a closed joint with adjacent slabs.
DriTherm Cavity Slabs have a special additive to make the
product water repellent and are produced in three grades:
- DriTherm Cavity Slab 37 Standard has a thermal
conductivity ranging from 0.035 to 0.037 W/mK
- DriTherm Cavity Slab 34 Super has a thermal conductivity
of 0.034 W/mK
- DriTherm Cavity Slab 32 Ultimate has a thermal
conductivity of 0.032 W/mK
Application
DriTherm Cavity Slabs are for the thermal insulation of masonry
cavity external walls, either partially filling or fully filling
the cavity. They are approved for use in buildings up to 12m high
in any exposure zone and for use in multi-storey applications up to
25m in height.
Standards
DriTherm Cavity Slabs are non-combustible inorganic glass wool,
defined as mineral wool in BS 3533: 1981 and are manufactured in
accordance with BSI Quality Assurance Standard BS EN ISO 9001:
2000.
Durability
DriTherm Cavity Slabs are odourless, rot proof,
non-hygroscopic, do not sustain vermin and will not encourage the
growth of fungi, mould or bacteria.
Vapour Resistance
DriTherm Cavity Slabs offer virtually no vapour resistance,
allowing water vapour to pass freely through the slab.
Certification
DriTherm Cavity Slab is certified by British Board of Agrément
Certificate 95/3212 which approves its use in buildings up to 12m
in height in any exposure zone, and in multi-storey applications up
to 25m in height.
DriTherm Cavity Slabs have been used in many buildings over
25m in height, including exposed coastal sites. Approval can be
sought from Knauf Insulation Ltd and the British Board of Agrément
for DriTherm Cavity Slab’s use in buildings over 25m high.
Guarantee
DriTherm Cavity Slabs are guaranteed for 50 years to resist
the transmission of liquid water from the outer masonry leaf to the
inner masonry leaf in new external cavity walls and to have a
thermal conductivity of 0.032 to 0.037 W/mK at normal building
temperatures. Masonry includes bricks, blocks and dressed and
reconstituted stone. The guarantee is available by application from
Knauf Insulation Ltd.
Environmental
| ECOSE® Technology |
Knauf Insulation mineral wool products with ECOSE® Technology benefit from a natural, formaldehyde-free binder made from rapidly renewable organic materials, instead of petroleum-based chemicals, which is up to 70% less energy intensive.
The technology has been developed for Knauf Insulation’s glass and rock mineral wool products, enhancing their environmental credentials without affecting the thermal, acoustic or fire performance. Insulation products made with ECOSE® Technology contain no dye or artificial colours – the colour is completely natural.
|
DriTherm Cavity Slabs are 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.
DriTherm Cavity Slab’s
manufacture has a low impact on the environment and is classified
as Zero ODP and Zero GWP.
Moisture Resistance
DriTherm Cavity Slabs contain a water repellent silicone binder
to ensure that no liquid water is able to pass through the slab and
reach the inner leaf of masonry.
Tests by the British Board of Agrément confirm that DriTherm
Cavity Slabs will not transmit water to the inner leaf. Nor will it
transmit moisture by capillary action across the cavity or from
below DPC level.
Handling and Storage
DriTherm Cavity Slabs are easy to handle and install, being
lightweight and easily cut to size.
They are 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. Installation instructions are on every pack.
DriTherm Cavity Slabs should not be left permanently exposed to
the elements.
Product Data
DriTherm Cavity Slab 37 Standard
| Thickness (mm) |
Thermal conductivity
(W/mK) |
Thermal resistance
(m2K/W) |
Slab Size (mm) |
Slabs per Pack |
Area per Pack
(m2) |
| 100 |
0.037 |
2.70 |
1200 x 455 |
12 |
6.55 |
| 85 |
0.037 |
2.25 |
1200 x 455 |
14 |
7.64 |
| 75 |
0.037 |
2.00 |
1200 x 455 |
16 |
8.74 |
| 65 |
0.037 |
1.75 |
1200 x 455 |
18 |
9.83 |
| 50 |
0.035 |
1.40 |
1200 x 455 |
18 |
9.83 |
All dimensions are nominal
DriTherm Cavity Slab 34 Super
| Thickness (mm) |
Thermal conductivity
(W/mK) |
Thermal resistance
(m2K/W) |
Slab Size (mm) |
Slabs per Pack |
Area per Pack
(m2) |
| 100 |
0.034 |
2.90 |
1200 x 455 |
8 |
4.37 |
| 85 |
0.034 |
2.50 |
1200 x 455 |
8 |
4.37 |
| 75 |
0.034 |
2.20 |
1200 x 455 |
10 |
5.46 |
| 65 |
0.034 |
1.90 |
1200 x 455 |
12 |
6.55 |
All dimensions are nominal
DriTherm Cavity Slab 32 Ultimate
| Thickness (mm) |
Thermal conductivity
(W/mK) |
Thermal resistance
(m2K/W) |
Slab Size (mm) |
Slabs per Pack |
Area per Pack
(m2) |
| 100 |
0.032 |
3.10 |
1200 x 455 |
6 |
3.28 |
| 85 |
0.032 |
2.65 |
1200 x 455 |
8 |
4.37 |
| 75 |
0.032 |
2.30 |
1200 x 455 |
8 |
4.37 |
| 65 |
0.032 |
2.00 |
1200 x 455 |
10 |
5.46 |
All dimensions are nominal