Crawlspace Encapsulation
in New Westminster, BC
New Westminster is British Columbia's oldest incorporated city and has one of the highest concentrations of pre-war residential housing in Metro Vancouver. The Queen's Park neighbourhood in particular has exceptional heritage housing stock — Victorian and Edwardian homes on full perimeter foundations, many with crawlspaces that were original construction in the early 1900s. When we work in these homes, we are often the fourth or fifth generation of tradespeople to address crawlspace conditions, and the accumulated history of previous repairs — good and bad — is part of what we need to understand before planning a current project.
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.
Why Choose Us in New Westminster?
- Experience with New Westminster's specific soil and drainage conditions
- Custom-designed systems — not one-size-fits-all packages
- Fully licensed, insured, and WCB-covered technicians
- Written report with photos after every inspection
- Workmanship guarantee on all completed work
Request Service in New Westminster
About New Westminster — What We See Here
New Westminster's hillside topography, with much of the residential development on slopes above the Fraser River, creates drainage challenges similar to other hillside communities in the region. The older storm drainage infrastructure in established neighbourhoods has limited capacity by modern standards, and during heavy rainfall events, surface water can overwhelm curb drains and flow toward residential foundations. The clay-over-till soil profile common on the slopes holds water at the surface and creates hydrostatic pressure against foundation walls.
The city's older homes frequently have original fir framing that, when dry, is dense and hard — actually more resistant to rot than modern hem-fir in many cases. However, the moisture conditions in unencapsulated crawlspaces over the decades can compromise even dense old-growth fir over time. We pay particular attention to the condition of original sill plates, which are often the first structural element to show moisture damage because they sit closest to the ground. Where sill plates are solid, the adjacent framing is usually in better shape than the exterior appearance of the crawlspace might suggest.