Properly installed spray foam insulation in a Langley BC home is designed to last the lifetime of the building — typically 80 years or more for closed-cell products. Unlike fibreglass batts, which compress, sag, and lose R-value over time in moisture-exposed locations like crawlspaces, spray foam bonds to the substrate and does not degrade, settle, or lose performance under normal conditions. For Langley homeowners making a long-term investment in their home's performance, spray foam in moisture-sensitive locations is a once-and-done solution. Full lifespan guide at westerninsulation.ca/spray-foam-insulation/