Foundation Waterproofing in Seattle

It's a set of measures that keep water and moisture from getting through your foundation walls and floor into your basement or crawl space. The aim is to protect the structure from water damage and keep the space below your home dry.

Look for dampness or moisture in the basement or crawl space, mold or mildew on walls, floors, or ceilings, cracks in walls or floors, lingering musty odors, standing water near the foundation, sinking or uneven floors, and unusually high indoor humidity.

Cracks often come from pressure built up by water collecting in the soil around the foundation. As that water pushes against the structure, it can stress the walls and floor, which is why cracking is one of the clearer signals that water is getting where it shouldn't.

It works in stages. Drains are installed to carry water away from the foundation, a treatment is applied to stop moisture from passing through the walls, and additional steps direct water away from the building. Careful planning matters here, since timing, weather, and proper concrete curing all affect how well the finished work holds up.

We use quality materials built for the job, including MiraDRAIN fabric and Henry's waterproof coatings, chosen to seal the foundation effectively and hold up over time.

Waterproofing is typically applied to foundation walls that have soil on one side and usable space, like a basement, on the other. That's where water pressure from the surrounding ground is most likely to force moisture through.

Along with preventing water damage to your structure and belongings, waterproofing cuts down on the moisture that feeds mold and mildew, and it can improve energy efficiency by keeping the space drier, which may lower heating and cooling costs. Protecting against water damage also helps preserve your property's value.