BC Building Code requires vapour barriers in crawlspaces — and for good reason. Without one, ground moisture enters the crawlspace air, fuels mold, attracts pests, and accelerates wood rot in your floor joists and subfloor. Western Insulation installs code-compliant polyethylene vapour barriers (10–20 mil) alongside closed-cell spray foam or rigid foam board insulation for every crawlspace insulation project in Langley. The result is a clean, dry, properly sealed crawlspace that performs for decades. Available rebates through BC Hydro and FortisBC can offset up to $5,500 of the project cost for eligible Langley homeowners. Read the full guide at westerninsulation.ca/crawlspace-insulation-langley-bc/ and explore our services at westerninsulation.ca/spray-foam-insulation/ and westerninsulation.ca/rigid-foam-insulation/