Knauf Insulation’s Earthwool® DriTherm Cavity Slab has been a firm favourite for insulating masonry cavity wall for many years. In the quest to minimise the performance gap it is critical to recognise the importance of accurate installation of all insulation materials.
Recent research shows that air movement within cavity walls leads to extra heat loss. Gaps between the insulation product and the inner leaf, around openings, penetrations and individual pieces of insulation promote this unintended heat loss.
Earthwool DriTherm is fit tolerant and can be cut with a positive tolerance so that the slabs fit snuggly together and against penetrations and openings. Therefore, it can accommodate slight variations in the surface of the inner leaf – restricting air movement and delivering real thermal performance.