Not all parts of your Langley home need the same R-value — and understanding the difference between your attic, walls, basement, and crawlspace is the first step to making smart insulation decisions. The attic needs the most at R-50 to R-60. Exterior walls need effective R-22 to R-24, which often requires combining cavity batts with continuous rigid foam to prevent thermal bridging through the framing. Basement and crawlspace walls need a minimum of R-20, best achieved with closed-cell spray foam that acts as both insulation and vapour barrier in one application. Western Insulation covers every zone in detail and explains exactly where most Langley homes fall short. Read the complete R-value insulation guide for Langley BC — then explore our full home insulation services in Langley to get started.