Crawlspace Encapsulation
in Grandview Heights, BC

Grandview Heights is one of South Surrey's rapidly developing neighbourhoods, with a mix of townhouses, single-family homes, and multi-family residential projects built over the past decade. The newer construction in this area generally benefits from modern vapour barrier requirements in the BC Building Code, but "code minimum" is not always sufficient given local soil and drainage conditions — particularly as the neighbourhood transitions from a largely residential to a more urbanized form with increased impervious surfaces that alter surface water flow patterns.

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.