Crawlspace Encapsulation
in Fraser Heights, BC

Fraser Heights occupies the higher ground on the northwestern edge of Surrey, overlooking the Fraser River valley and offering some of the best natural drainage in the municipality. The soils here transition from the heavy clay of lower Surrey to a siltier, better-draining mix on the upper terraces. Homes in Fraser Heights, many of which were built in the 1980s and 1990s, tend to have fewer flooding and standing-water problems than neighbours in lower-elevation areas, but they are not without crawlspace challenges.

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.