Crawlspace mold in Langley BC homes is almost always a moisture problem — and insulation is the solution that addresses the moisture at its source rather than treating the symptom. An uninsulated crawlspace allows ground moisture to evaporate upward continuously, condensing on the cold floor structure above and creating mold conditions in floor joists and subfloor panels. Closed-cell spray foam on crawlspace walls and a vapour barrier on the crawlspace floor eliminate the moisture pathway that mold depends on. Western Insulation provides free crawlspace mold risk assessments across Langley. Book at westerninsulation.ca/basement-and-crawlspace-insulation/