In regard to the range of cavity wall insulation options the mac design guide for taller masonry cavity walls says a foil faced polyisocyanurate insulation is the most beneficial iso is known for its use as roofing insulation but it is also recommended in masonry cavity walls for its thermal moisture and fire performance as well as.
Rigid insulation in wall cavity.
Cavityrock is a semi rigid insulation board designed for exterior cavity wall and rainscreen applications.
Rigid cavity wall insulation kingspan kooltherm k8 cavity board is a high performance fibre free rigid insulation suitable for cavity wall applications.
Extruded polystyrene xps rigid foam insulation available foam sealed designed for masonry cavity wall applications foamular cw25 extruded polystyrene xps insulation is virtually impervious to moisture along with its high r value light weight competitive price and wide range of sizes makes it ideal for use in a cavity wall system.
The correct method of using rigid foam is to run continuous 4 foot by 8 foot sheets of the foam across the concrete basement wall making the rigid foam the de facto wall.
These products offer superior long term thermal efficiency fire resistance moisture control acoustic performance and are compatible with numerous framing systems and cladding attachment systems.