Drainage Solutions
in Brentwood, BC

Brentwood is one of Burnaby's most actively developing neighbourhoods, with rapid densification around the Brentwood Town Centre SkyTrain station transforming what were single-family residential streets into a high-rise urban district. Beneath this transformation, however, there remains a significant inventory of older single-family homes on crawlspace foundations in the surrounding streets — homes that were built in the 1960s and 1970s and have not had major crawlspace work since original construction.

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.