Spray foam insulation in Langley BC costs $1.50 to $2.50 per board foot installed for open-cell and $2.50 to $5.00 per board foot for closed-cell. For a typical Langley crawlspace, a complete spray foam project including vapour barrier runs $3,000 to $6,500 before BC Hydro and FortisBC rebates of up to $1,200 on qualifying crawlspace upgrades. For rim joists, costs run $500 to $1,500 depending on perimeter length. Western Insulation provides written, zone-specific quotes with confirmed BC rebate eligibility — free assessment at westerninsulation.ca/spray-foam-insulation/