Crawlspace insulation in Langley BC using closed-cell spray foam on walls and a vapour barrier on the floor typically costs $3,000 to $6,500 for an average-sized crawlspace before BC Hydro and FortisBC rebates of up to $1,200 on qualifying upgrades reaching R-20 minimum. Rigid foam board on crawlspace walls is a cost-effective alternative at $1.50 to $3.50 per square foot in dry crawlspaces. Western Insulation provides written, specific quotes covering every cost element — free assessment at westerninsulation.ca/basement-and-crawlspace-insulation/