February 10, 20215 yr Question: Can Dritherm mineral wool slabs be used with block inner and outer leaves, if thin joint blockwork is used? Any serious potential downsides? Any more economical / buildable way of cavity wall insulation if thin joint blockwork used for inner & outer leaves? Thanks Context: Need to control costs, for better or worse. Not forever home. Non-masonry options ruled out for various reasons. Site foreman, scaffolding costs etc all increase with duration of build/delays. So, for better or worse, duration of build is important consideration. SAP pass with wall U value 0.25, airtightness 4.0, floor over slab insulation 100 mm Celotex
February 10, 20215 yr @WWilts, Dritherm Cavity slabs are rated for 'full fill'. Silver/Graphite/Grey bonded EPS bead, conductivity 0.033/0.032W/mK with any block with a thermal resistance less/equal to 0.18W/m.K would get to your U-value. i.e. 100mm block/100mm bonded bead/100mm block. It could possibly be top filled.
February 10, 20215 yr Bin the thin joint if you want fast (as I have said before) Are you sure that is the wall figure or the weighted wall figure when including the windows...??
February 10, 20215 yr Author 7 hours ago, PeterW said: Are you sure that is the wall figure or the weighted wall figure when including the windows. My guess is wall figure
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