About US


NWCW, LLC (Northwest Concrete Waterproofing) has made a name for itself industry-wide as the “go to” specialty contractor in the greater Pacific Northwest region for elevator pit leak repair, seawall / bulkhead repair and waterproofing. We are structural concrete waterproofing, sealing, commercial coatings, and protective linings specialists.

NWCW’s expertise is proven and our knowledge and experience are valued for projects such as concrete waterproofing, leak repair, wastewater system maintenance, asset rehabilitation and repair as well as troubleshooting.We are also a local and family owned business that has the capacity to serve the Seattle, Tacoma, Portland and Spokane markets.

WHY Choose Us?


We serve the general building maintenance industry, property management, multi family, commercial, industrial, construction, and municipalities with water proofing, leak repair, concrete restoration, elevator pit, and seawall rehabilitation and protection needs. We fit our specialized expertise into your project however you need us, as a direct contractor or subcontractor. 

SERVING PROPERTY MANAGERS & BUILDING OWNERS AND BUILDING ENGINEERS

With their needs for elevator pit leak repair, waterproofing, underground concrete leak repair and specialty concrete crack repair. We are a go to contractor in the Seattle, Tacoma, Portland and Spokane markets.

SPECIALTY CONCRETE SERVICES

Special situations such as elevator pit leak repair and sealing as well as seawall and bulkhead repair and restoration. We also provide crack and seal repair that is common among these situations.

ELEVATOR SERVICE COMPANIES

We serve all of the major elevator companies in Washington, Oregon, and Idaho providing elevator pit sealing, water removal, and general contractor services.

SERVING GENERAL CONSTRUCTION & MUNICIPALITIES as INFRASTRUCTURE SPECIALISTS

With their needs in storm water, wastewater, and potable water systems. Most noticeably in manhole renewal, larger diameter pipeline rehabilitation, tank repairs and protective coatings.