Earthwool DriTherm Cavity Slabs are semi-rigid or rigid slabs of non-combustible, water repellent, glass mineral wool. They are 455mm wide to suit standard vertical wall tie spacings, ensuring a closed joint with adjacent slabs.
Knauf Insulation mineral wool products made with ECOSE® Technology benefit from a formaldehyde-free 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 developedfor 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.
Earthwool DriTherm Cavity Slab is suitable for use as partial and full fill cavity wall insulation and is effective in reducing the thermal transmittance (U value) of cavity walls with masonry inner and outer leaves where masonry includes clay and calcium silicate bricks, concrete blocks, and natural and reconstituted stone blocks
British Board of Agrément approved for use in all exposure zones
Excellent thermal and fire performance
Slabs ‘knit’ together, thus eliminating air gaps between adjacent slabs
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.
Tests by the British Board of Agrément confirm that Earthwool DriTherm Cavity Slabs will not transmit water to the inner leaf. Nor will they transmit moisture by capillary action across the cavity or from below damp proof course level.
Earthwool DriTherm Cavity Slabs offer negligible resistance to the passage of water vapour and have a water vapour resistivity of 5.00MNs/g.m.
Earthwool 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 cavity walls and to have a thermal conductivity of 0.032 to 0.037 W/mK at normal building temperatures *Available by application to Knauf Insulation Ltd
Earthwool DriTherm Cavity Slabs are certified by British Board of Agrément Certificate 95/3212. Approval can be sought from Knauf Insulation Ltd and the British Board of Agrément for Earthwool DriTherm Cavity Slab’s use in buildings over 25m high.
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 elements
Universal Slabs are odourless, non-hygroscopic, rot proof, do not sustain vermin and will not encourage the growth of fungi, mould or bacteria.