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, concrete crack 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.

Commercial Services

NWCW specializes in waterproofing of commercial, municipal, institutional and industrial structures:

• new and old conveyance systems

• commercial parking garage structures

• elevator shafts and elevator pits

• commercial and industrial buildings, water towers, and cooling systems

A core focus of our waterproofing work concerns water inflow & infiltration mitigation on conveyance systems:

• large-diameter (30″+) pipelines that allow man entry

• sewer manholes

• wet wells

• lift stations

• storm water catch basins

• utility vaults

• treatment plants

Commercial-Grade Waterproofing. Now for Your Home

Pierce & Kitsap County homeowners trust NW Concrete Waterproofing — the same team
that protects commercial buildings across the Pacific Northwest.

OUR RESIDENTIAL SERVICES

Every service backed by commercial-grade materials and crews who handle large-scale Projects
across the Pacific Northwest.

Basement Waterproofing:

Stop water intrusion at the source with interior drainage systems, exterior membranes, and sump pump
installation. Commercial-grade solutions scaled for your home. Learn More here.

Crawl Space Encapsulation:
Seal out moisture, mold, and cold air with a complete encapsulation system — vapor barriers,
drainage, and dehumidification designed to last decades. learn more here.

Crawl Space Repair:
From wood rot and mold to sagging floors and structural damage — we diagnose the root cause and fix it
right using the same protocols as our commercial projects. learn more here.

Crawl Space Remediation:
Complete remediation of mold, moisture, pests, and structural damage. We eliminate the problem and install
permanent protection so it never returns.

WHY CHOOSE NW CONCRETE WATERPROOFING?

Commercial Expertise in Every Residential Job

Most waterproofing companies serve only the residential market. NW Concrete Waterproofing is different —
we built our reputation on commercial and industrial work across the Pacific Northwest. That
means the crew walking into your home uses the same techniques, the same materials, and the same
quality standards as crews on multi-million-dollar commercial projects.

In Pierce and Kitsap County, that commercial-grade difference is visible in every job we complete: tighter
membrane seams, deeper drainage installation, and follow-up assessments that residential-only companies
simply don't offer.

The Pacific Northwest Problem

Homes in Pierce and Kitsap County face a unique convergence of moisture challenges that national
waterproofing chains simply aren't designed to handle:

• Glacial clay soils that compress and expand with seasonal moisture, pushing water toward foundation
walls

• Kitsap's marine air keeping humidity elevated year-round, even in basements and crawl spaces

• Puget Sound's high water table in lower-elevation neighborhoods of Bremerton, Port Orchard, and Gig
Harbor

• 37 inches of annual rainfall that saturates soil and creates persistent hydrostatic pressure
Our solutions are calibrated to this exact environment — not copy-pasted from a national playbook.

FREQUENTLY ASKED QUESTIONS

Q: What areas do you serve?
A: NW Concrete Waterproofing serves all of Pierce County and Kitsap County, Washington. Our service
area includes Tacoma, Lakewood, Puyallup, Gig Harbor, Bonney Lake, Auburn, Federal Way, Kent,
Renton, Bremerton, Silverdale, Port Orchard, Belfair, Kingston, and surrounding communities. Call us to
confirm service availability in your specific area.

Q: How is NW-CW different from national companies?
A: National waterproofing franchises use standardized systems designed for average conditions across
the country. NW Concrete Waterproofing is locally rooted in the Pacific Northwest and specializes in the
unique challenges of glacial clay soils, Puget Sound water tables, and marine humidity. More importantly,
our team comes from a commercial and industrial background — we use the same materials and installation
standards on your home as we do on large commercial projects.

Q: How long does waterproofing take?
A: Most residential waterproofing projects are completed in 1–5 days depending on scope. A basement
waterproofing job typically takes 1–4 days for interior systems. Crawl space encapsulation usually takes
1–5 days. More comprehensive remediation projects involving structural repair may take 3–6 days. We
provide a clear timeline during your free inspection so there are no surprises.

Q: Do you offer warranties?
A: Yes. All of our waterproofing systems come with a written warranty. Specific warranty terms vary by
service type and materials used, and will be clearly outlined in your project contract. We stand behind our
commercial-grade work with the same accountability we bring to our commercial clients.

Q: What signs indicate I need waterproofing?
A: Common warning signs include: water stains or efflorescence (white mineral deposits) on basement
walls, musty or moldy odors in your home, visible mold growth, damp or wet crawl space floors, sagging
or soft flooring above the crawl space, increased allergy symptoms, higher than normal energy bills, and
cracks in foundation walls. If you notice any of these, schedule a free inspection before the problem
worsens

Ready to Protect your home?

Get a free inspection from the Pacific Northwest's commercial-grade waterproofing specialists.