Foundation Waterproofing

What This Service Involves

Foundation waterproofing is the exterior defense that keeps groundwater out of basements and crawlspaces before it ever finds a crack. We clean and prep the wall, then apply a bonded membrane or fluid-applied coating that seals the concrete against the hydrostatic pressure our region's water table can produce. Drainage board and a properly bedded footing drain relieve that pressure and carry water away from the wall. This exterior approach stops moisture at the source rather than managing it after it has entered. The result is a drier, healthier below-grade space you can finish with confidence.

Benefits

A sealed exterior barrier against groundwater intrusion; Membranes rated for the region's hydrostatic pressure; Drainage board that relieves pressure on the wall; Footing drains that carry water safely away; A drier below-grade space ready to be finished

Our Process

1) Excavate and clean the foundation wall to bare concrete; 2) Patch defects and apply the waterproofing membrane; 3) Install drainage board and a bedded perimeter footing drain; 4) Backfill carefully and confirm positive drainage away from the wall

What Affects the Cost

Linear footage and height of wall to treat; Membrane or coating system the conditions require; Excavation access to reach the exterior wall; Drainage board and footing drain materials needed; Backfill and grading to direct water off the wall

Best Time of Year

Exterior waterproofing is best tackled in drier weather when excavations stay stable, ahead of the heavy Northwest rains.