Cold Roofs

With cold roof construction, the under-surface temperature of the metal roofing will at times be quite low, so the primary tool of managing condensation is controlling the concentration of water vapour in the attic space. Some condensation is inevitable, and it must be managed to ensure the wetness is not excessive in either degree or duration — allowing moisture to accumulate.

In typical cold roof construction, the insulation is at ceiling level and there is an air gap between the insulation and the roof surface.