Drainage Solutions
in North Vancouver, BC
North Vancouver — comprising both the City and the District — sits on the steep south-facing slopes of the Coast Mountains, with residential development climbing from the waterfront up to the base of the ski hills at Grouse, Cypress, and Mount Seymour. This topographic setting creates dramatic drainage dynamics: rainfall that lands anywhere on the mountain eventually moves downhill, and the mosaic of residential lots on these slopes intercept and redirect that flow in unpredictable ways. Any home on a sloped lot in North Vancouver is managing not just the rainfall that lands on its own property but potentially a portion of what lands above it.
Drainage problems in crawlspaces have two distinct origins: water that arrives from outside (surface runoff, failed exterior drainage, high water table) and water that condenses from the air inside the crawlspace onto cooler surfaces. The solutions for each are different, and correctly diagnosing which problem you have — or which combination — is the critical first step. Applying interior drainage solutions to an exterior water problem provides partial relief at best; addressing the exterior source is far more effective and usually less disruptive.
Interior drainage systems — perimeter drain tile installed inside the crawlspace along the base of the stem wall — are the right solution when exterior work is impractical (due to finished landscaping, hardscaping, or very tight site conditions) or when the primary issue is groundwater rising from below rather than surface water entering through the wall. Interior drain tile channels water to a sump pit where a pump removes it. This approach does not stop water from entering the foundation, but it manages it effectively once it does.
Why Choose Us in North Vancouver?
- Experience with North Vancouver'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 North Vancouver
About North Vancouver — What We See Here
The soils on the North Shore are predominantly shallow glacial till over bedrock, which drains quickly in some areas and slowly in others depending on the specific till composition and the presence of clay lenses. Because the till is relatively thin in many locations, the bedrock beneath it can channel water in directions that are difficult to anticipate without site-specific investigation. Homes that appear to have good drainage in dry periods can experience significant water intrusion during intense rainfall events as subsurface flow channels saturate and overflow.
Many of North Vancouver's established residential neighbourhoods — Lynn Valley, Moodyville, Upper Lonsdale — were built in the 1940s through the 1970s on crawlspace foundations, and the combination of steep site drainage, high annual precipitation, and aging construction has created persistent crawlspace moisture problems in a large proportion of this housing stock. The structural challenges are also more complex here because sloped lots sometimes result in one side of the crawlspace being at grade or above while the other is several feet below grade — requiring drainage solutions that address both the high and low sides of the foundation.