4 Foundation Repair Service Providers in Cougar, WA

  • Advanced Waterproofing LLC is a locally owned, family business based in Longview, Washington that specializes in waterproofing homes in the surrounding areas of Cowlitz County and Clark County.

  • We are a team of professionals specializing in helping you with all your waterproofing drain and foundation repairs.

  • At TerraFirma, we understand that foundation cracks, wet crawlspaces, and musty basements are stressful. We offer a free onsite estimate for all work that you may need to be completed, and we will work with you.

  • Our waterproofing contractors are deeply experienced with a wide variety of issues and can provide residential waterproofing and exterior basement waterproofing services.