Crawlspace Encapsulation
in Abbotsford, BC

Abbotsford is the largest city in the Fraser Valley and the primary agricultural hub of the region. It straddles the transition between the flat Fraser River plain — the Matsqui Prairie — and the upland areas around Sumas Mountain and Vedder Mountain. This topographic divide produces very different crawlspace challenges in different parts of the city. Homes in the Clearbrook and Matsqui Prairie areas sit on some of the flattest, lowest, and most water-retentive agricultural soils in the region; the 2021 atmospheric river event that caused catastrophic flooding in the Abbotsford area demonstrated vividly how quickly these flat, low-lying areas can be overwhelmed by water.

Crawlspace encapsulation is one of the most effective investments a homeowner in Surrey or the broader Lower Mainland can make. The process involves covering the crawlspace floor and walls with a continuous, heavy-duty polyethylene vapor barrier — typically 12-mil or 20-mil reinforced poly — then sealing every seam, penetration, and vent opening with industrial-grade tape and adhesive. The result is a fully conditioned environment that is physically isolated from ground moisture and the damp Pacific Northwest soil beneath your home.

The installation process begins with a thorough cleanup — removing old fiberglass batt insulation (which absorbs moisture and harbors mold), clearing any debris, and treating visible mold colonies. Technicians then install the vapor barrier across the ground, lapping it up the walls and piers, and sealing it to the stem wall with adhesive and mechanical fasteners. All vents are closed and sealed from the inside. Depending on the space, we may also install a commercial-grade dehumidifier calibrated to maintain relative humidity around 50 to 55 percent throughout the year.