2 lb closed-cell spray foam — referring to its density of 2 pounds per cubic foot — is the standard professional-grade product used for crawlspaces, rim joists, basement walls, and cathedral ceiling assemblies in Langley BC residential construction. At this density, closed-cell spray foam delivers R-6 to R-7 per inch, resists moisture completely, and bonds permanently to concrete, wood, and masonry surfaces. It is the product Western Insulation installs on every Langley crawlspace and basement wall spray foam project. Full specification guide at westerninsulation.ca/spray-foam-insulation/