The result is the following guide to the best insulation for exterior walls. See It Sika’s Rmax Pro Select board is ...

Walls Around 35 per cent of your ... insulate them with fiberglass, sprayed foam, or foam board – but ensure your insulation is vapour-permeable so you don’t risk rotting the wood.

Commonly used insulating materials include mineral wool, polystyrene beads or polyurethane foam. The insulation is blown into the wall cavity from the outside ... or the British Board of Agrément (BBA ...