A wall is a system of layers, and each layer has a defined job. The right wall insulation boards therefore depend on where the board sits, what it must contribute and how the wall manages structure, wind, rain, air leakage, water vapour, heat and sound.

Wind Barrier Board – ISOplaat and ProWind – ISOplaat are intended for wind-protection or sheathing-type applications in relevant external wall and timber-frame build-ups. Their role is to help protect the insulation layer from wind and cold-air movement while supporting a vapour-open envelope. They are non-structural softboards unless a current, application-specific approval states otherwise. Joint treatment, fixing, exposure and cladding details must follow the relevant documentation.

Insulation Board – ISOplaat and thicker ISOmodul boards are relevant where the design needs an additional wood-fibre insulation or acoustic layer in suitable wall or interior applications. Their porous structure can contribute to thermal and acoustic comfort, and their low weight makes them practical to cut and handle. Final performance depends on thickness, continuity, adjacent materials and workmanship.