Eurowall Full Fill Cavity Insulation is a 100% CFC and HCFC-free cavity wall insulation board, which is lightweight and easy to cut and install. This insulation board is suitable for insulating a completely filled masonry cavity wall, whilst maintaining a residual 10mm cavity to resist moisture transfer. Manufactured with a rigid polyisocyanurate (PIR) foam core and clad on both sides with aluminium composite foil.