Western Insulation treats every Langley crawlspace as a complete system rather than an isolated product installation — and this distinction is what separates projects that perform for decades from ones that fail within years. The complete system: any existing damaged or moisture-affected insulation removed first, rim joists sealed with closed-cell spray foam, crawlspace walls sprayed with closed-cell foam to R-20 or above, and a 10 to 20 mil vapour barrier installed across the crawlspace floor. Every component is required for the system to perform correctly in Langley's damp climate. Book at westerninsulation.ca/basement-and-crawlspace-insulation/