Beaverton is one of the fastest-growing cities in Oregon, but much of its housing stock is olderbuilt during the 1960s through 1990s tech corridor expansion, on Washington County’s clay and silt soils that hold seasonal rainfall for weeks at a time. When Portland’s rainy season hits, those soils saturate quickly, and the pressure they build against Beaverton’s older foundation walls is one of the most consistent causes of basement flooding we see in Washington County.
Better Basement and Waterproofing serves Beaverton and surrounding Washington County communities with the same licensed, warrantied waterproofing work we deliver throughout the Portland metro.
WHY BEAVERTON BASEMENTS FLOOD
Washington County’s Tualatin Valley sits on a flat, low-lying basin drained by the Tualatin River. That flat terrain slows surface water drainage significantly during the wet season. Neighborhoods like Cedar Hills, Raleigh Hills, and Garden Home sit on soils that were historically wetlands or floodplain and despite decades of development, the soil’s water-holding characteristics remain.
During heavy rainstorm cycles from October through May, Beaverton foundations face sustained hydrostatic pressure from fully saturated soil that cannot drain between storms. Water-saturated clay soil pushes against every crack, joint, and porous section of a concrete foundation. Once it finds a path, it uses that path every season.
For a full explanation of how soil type drives basement flooding, read our guide on Portland’s clay soil and basement water problems. The same geology that makes Beaverton’s tech campuses sit on flat land makes its residential basements vulnerable to the same pressures.
WHAT WE INSTALL IN BEAVERTON HOMES
Interior perimeter drainage system. For Beaverton basements with recurring water intrusion, an interior drainage system captures water at the cove joint and routes it to a sump pump before it reaches the floor. This is the most reliable solution for the sustained hydrostatic pressure Washington County soils create.
Sump pump installation with battery backup. A properly sized pump with battery backup is essential for Beaverton homes. PGE outages during winter storms are the exact moments when a sump pump is working hardest.
Foundation crack repair. We seal leaking cracks with polyurethane or epoxy injection. Beaverton’s clay soil creates significant seasonal foundation movement, making crack development more likely in older homes.
Crawl space encapsulation. Beaverton has a mix of basement and crawl space homes. For crawl space properties, full encapsulation with a sealed vapor barrier and conditioned vents addresses the ground moisture that Tualatin Valley soils produce year-round.
For a clear picture of what these services cost, see our Portland basement waterproofing cost guide. Every Beaverton project starts with a free inspection and written estimate.
We are licensed with the Oregon Construction Contractors Board. Verify our license before signing anything.
Schedule your free Beaverton basement inspection here
Better Basement and Waterproofing serves Beaverton, Portland, Eugene, Vancouver, and surrounding communities in Oregon and Washington.
