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Knauf Dritherm 32

Knauf Earthwool Dritherm 32 Cavity Slab Ultimate – 150mm (pack/4)

Glass Mineral Wool – Earthwool DriTherm 32 Ultimate

Knauf Dritherm 32 are non-combustible Glass Mineral Wool slabs, manufactured using our revolutionary ECOSE® Technology and a water repellent additive, designed for use in external masonry cavity walls to provide a full-fill insulation solution which is installed as walls are being built.
They are 455mm wide to suit standard vertical wall tie spacings allowing a closed joint with adjacent slabs.

Application – Masonry cavity walls

Thickness: 150mm
All Thickness: 75,85,100,125,150mm
Width: 455mm
Length: 1200mm
Pack Quantity: 4
Pack Coverage: 2.18m2
Density: 27kg/m3
Weight: 8.83kg
Thermal conductivity: From 0.032 to 0.037 W/mK
Thermal Resistance: 4.65m2K/W
Fire Rating: A1(Non-combustible)
Material: Glass Mineral Wool
Water vapour resistivity: 5.00MNs/g.m


Excellent thermal performance.
    Non-combustible A1 Euroclass Reaction to Fire classification
    Manufactured using a water repellent additive
    Fully fill the cavity to prevent mortar snots and prevent bridges
    Slabs are sized to fit between wall ties without the need for retaining discs,
    Quick and easy to install
    British Board of Agrément approved for use in all exposure zones


DriTherm BBA Logo – Certificate No: 95/3212
Eurofins Gold
A1 Euroclass Fire Rating
Green Guide Rating A+
CE Marking
Bureau Veritas


Durability – Earthwool DriTherm Cavity Slabs are odourless, rot proof, non-hygroscopic, do not sustain vermin and will not encourage the growth of fungi, mould or bacteria.

Application – Earthwool DriTherm Cavity Slabs are for the thermal insulation of masonry cavity external walls and are installed to fully fill 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 – Earthwool DriTherm Cavity Slabs are manufactured in accordance with BS EN 13162, ISO 50001 Energy Management Systems, OHSAS 18001 Occupational Health and Safety Management Systems, ISO 14001 Environmental Management Systems, and ISO 9001 Quality Management Systems, as certified by Bureau Veritas.
Environmental – Earthwool DriTherm Cavity Slabs represent no known threat to the environment and have zero Ozone Depletion Potential and zero Global Warming Potential

Vapour resistivity – Knauf Dritherm 32 Cavity Slabs offer negligible resistance to the passage of water vapour and have a water vapour resistivity of 5.00MNs/g.m.

Handling and storage – Earthwool DriTherm Cavity Slabs are easy to handle and install, being lightweight and easily cut to size, where necessary. 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. Earthwool DriTherm Cavity Slabs should not be left permanently exposed to the element

Knauf Insulation mineral wool products made with ECOSE Technology® benefit from a no added formaldehyde binder, which is up to 70% less energy intensive than traditional binders and is made from rapidly renewable bio-based materials instead of petroleum-based chemicals. 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.

Knauf Earthwool Dritherm 32 Cavity Slab Ultimate – 150mm (pack/4)

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