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

Elevate's RESISTA is a high-performance polyisocyanurate (PIR) insulation board laminated on both sides to a gas-tight, multi-layered aluminum-kraft facer (AK) or mineral-coated glass fiber facer ...

If your home is listed, or in a conservation area, planning rules may not allow external wall insulation. The most thermally efficient EWI systems typically use plastics such as expanded polystyrene ...