Closed-cell spray foam delivers R-6 to R-7 per inch — more than twice the thermal resistance of standard fibreglass batts in the same thickness. It is completely impermeable to moisture, bonds directly to every surface it contacts, and acts as both insulation and vapour barrier simultaneously. In Langley BC's persistently damp climate, these properties make it the only consistently reliable insulation solution for crawlspace walls, rim joists, basement foundation walls, and cathedral ceiling assemblies. Western Insulation installs closed-cell spray foam on every North Shore and Fraser Valley project. Full application guide at westerninsulation.ca/spray-foam-insulation/