An external wall insulation (EWI) system is fixed to the outside of a building to minimise heat loss through the building structure, and thereby reduce energy use. It also provides a weather-proof facade, controls condensation, eliminates cold bridging and reduces sound transmission. The system is formed of several layers of core components. From inside to outside, these are: beads and closures, adhesive, insulation, reinforced basecoat, primer and topcoat. Depending on the required performance and appearance, different types of insulation and render-based finish can be used. EWI can be applied to blockwork, brickwork and concrete-based substrates, as well as various frame constructions using an external cement-based particle board.
展开▼
