Spray foam is the only insulation product that meets BC Building Code requirements for unvented roof assemblies — where insulation must be applied to the underside of roof decking rather than the attic floor. In Langley homes with cathedral ceilings, vaulted living areas, or converted attic spaces, closed-cell spray foam applied to the underside of the roof deck creates both the required R-value and the continuous air and vapour barrier the assembly needs. Western Insulation installs spray foam cathedral ceiling insulation across Langley and the Fraser Valley. Book at westerninsulation.ca/spray-foam-insulation/