Drainage Solutions
in Mission, BC
Mission sits on the north bank of the Fraser River directly opposite Abbotsford, with the older parts of the community perched on the hillside above the river and newer development extending north up the Dewdney Trunk Road corridor. The hillside setting gives many Mission homes good natural drainage by gravity — a significant advantage compared to the flat bottomland communities — but the steep terrain creates its own challenges, including lateral water pressure against uphill foundation walls and erosion that can undercut perimeter drainage.
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 Mission?
- Experience with Mission'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 Mission
About Mission — What We See Here
The historic downtown area of Mission has residential housing dating from the late 1800s through the mid-20th century, including some of the oldest surviving homes in the Fraser Valley. Crawlspaces in these properties have had a very long time to accumulate problems, and the original structural wood — where it survives — is often dense, slow-growth timber that has proven remarkably durable despite decades of inadequate moisture management. Even so, prolonged moisture exposure eventually catches up with any wood species, and we often find targeted areas of significant rot alongside sections of original framing that are still structurally sound.
Mission's location at the head of the navigable Fraser means it experiences some of the highest spring freshet water levels in the region during snowmelt years. Properties near the river and in the lower Mission areas should have sump systems that are sized to handle freshet conditions, not just typical winter rainfall — a meaningful distinction in terms of pump capacity specification.