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.
Product Information and Certification
Links to manufacturer's information. Click to download in a separate browser window.
Knauf Universal Slab Datasheet | Knauf Earthwool Flexi Slab Datasheet | Knauf Earthwool Handy Guide |
Knauf Building Slab Range - Certification
Earthwool Building 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.
The Certificate holder has taken the responsibility of CE marking the Earthwool DriTherm Cavity Slab in accordance with harmonised European Standard BS EN 13162 : 2012. An asterisk (*) appearing in this Certificate indicates that data shown are given in the manufacturer’s Declaration of Performance.
Knauf Insulation Products CE Markings
Important to note is that products that are currently CE marked or have been CE marked before July 1st 2013 are deemed to comply automatically with the CPR (Construction Products Regulation). All of Knauf Insulations building insulation products are CPR ready, additionally the CPR does not apply to fire protection and acoustic insulation products so they are unaffected by this new legislation.
The most important part of the CPR is the Declaration of Performance (DoP) which contains all of the key information about a product`s characteristic`s, when compiling the DoP the product manufacturer assumes responsibility that the product is in confirmation with its declared performance characteristics.
Knauf Insulation can provide a DoP for each product which can be able to find online via a unique web address to be found on the product label, packaging or invoice - this is not a service that we undertake on Knauf's, our our customer's behalf.