Specifying FOAMGLAS® insulation to minimise condensation risk.
Nearly all building products and materials allow moisture vapour to pass through them. To stop too much moisture vapour reaching cold surfaces within a construction and condensing, it is common practice to design and specify a vapour control layer (VCL) on the warm side of the thermal insulation layer.
A vapour control layer often contributes to the airtightness of the building envelope as well as its vapour tightness. Maintaining an air and vapour tight layer, in conjunction with a high level of insulation, reduces the likelihood of surface condensation occurring inside the building, or interstitial condensation occurring unseen within the building fabric.