When space is tight and R-value needs to be maximised, closed-cell spray foam stands apart from every other insulation material. At R-6 to R-7 per inch, it delivers more than twice the thermal resistance of standard fibreglass batts in the same thickness — and it acts as both an air barrier and a vapour barrier simultaneously, eliminating the need for separate products. In a Langley crawlspace, rim joist, or basement wall where moisture control matters as much as thermal performance, that combination is extremely valuable. Western Insulation installs spray foam across Langley for exactly these applications, and the complete R-value guide compares it against blown-in fibreglass, rigid foam board, mineral wool, and standard fibreglass batts so you can evaluate every quote with confidence. See the full insulation R-value material comparison for Langley homeowners — then explore our spray foam insulation service in Langley BC.