Washington

(425) 760-5077

Basement Wall Sealing in Washington

Protect Against Leaks, Moisture, and Mold

Cracks and porous basement walls let water in – but our wall sealing systems stop leaks at the source. With durable sealants and reinforcements, we protect your basement from moisture and damage.

Stopping Moisture at Its Entry Point

What Is Wall Sealing?

Wall sealing is a process that strengthens and waterproofs your basement walls by applying coatings, barriers, or injections that block water intrusion. Over time, porous concrete and foundation cracks allow moisture to seep through, leading to staining, mold growth, and structural weakening.

By sealing the walls, you not only stop water but also improve indoor air quality, protect finished spaces, and extend the lifespan of your foundation. Wall sealing is often combined with drainage systems for comprehensive waterproofing.

Common Signs You Need This Service:

Water stains, streaks, or discoloration on basement walls

Cracks in walls that expand during wet weather

Mold, mildew, or efflorescence forming along walls or mortar joints

Bowing or weakened walls due to long-term water exposure

Musty odors in finished or unfinished basements

Sealing Foundation Walls for Long-Lasting Protection

Our Wall Sealing Process

Wall sealing combines advanced materials and application techniques to stop water seepage. Depending on the damage, we use waterproof coatings, crack injections, or full vapor barriers.

Our method not only blocks current leaks but also strengthens walls against future moisture infiltration.

Repair process:

  • Damage Inspection Identify cracks, porous walls, or recurring leak points.
  • Surface Prep Clean and prep walls to ensure maximum adhesion.
  • Sealant or Injection Application Apply waterproof coatings or epoxy/urethane injections.
  • Vapor Barrier Installation (if needed) Add reinforced liners for extra moisture control.
  • Drainage Integration Connect sealing solutions to interior or exterior drainage systems.
  • Final Quality Check Test for leaks and confirm walls are watertight.

Answers About Protecting Your Basement Walls

Wall Sealing FAQs

What’s the difference between wall sealing and waterproofing?

Wall sealing applies coatings, injections, or barriers to stop water infiltration, while waterproofing often includes drainage and pumping systems.

How long do wall sealants last?

High-quality professional sealants and injections can last decades when paired with proper drainage.

Will wall sealing stop all leaks?

Wall sealing is highly effective, but if water pressure is strong, a drainage system may also be needed for full protection.

Is sealing messy or disruptive?

Not at all. Most applications are done inside and take just a few hours with little cleanup.

Can sealing improve air quality?

Yes. By stopping moisture seepage, wall sealing reduces musty odors and prevents mold growth.

Can sealing work on old or previously painted walls?

Yes. Surfaces are prepped to ensure adhesion, and injections or professional-grade sealants penetrate cracks regardless of age.

Will sealing fix foundation cracks too?

Sealants can stop moisture through cracks, but structural cracks may need reinforcement. We combine sealing with crack repair for lasting results.

How does wall sealing help in humid climates like Washington?

Sealing prevents moisture seepage, which reduces humidity levels inside the basement. This helps protect air quality and minimizes mold growth.

Still Have Questions About Wall Sealing?

If you’re not sure whether sealing alone is enough for your basement, let us help. We’ll walk you through your options and next steps.

Trusted by Homeowners Across Washington

Real People. Real Results.

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Dana Smith
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Update 4/12/26 The company reached out to us, came to our home and made a plan to properly lift our house. The work was done in a timely manner and we had a much better experience with them this time around. We are very happy with how things turned out. Awful company. We paid over $38,000 to raise our foundation 1.5”. It started cracking and they were unable to do what they said they could. They “stabilized “ it and left with our savings. It was the biggest waste of money and I suggest you go elsewhere. Garbage. Our house feels like it’s sinking more.
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Longitude 120 Engineering & Design
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If you need foundation repair, R&R Foundation Specialist should be your first call. Their team is one of the most reliable and professional that we have had the privilege to work with in the industry. We regularly refer clients to Cory and his extremely hard working and well trained staff, for all foundation repair, retrofit, lifts /stabilization needs.
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Kirsten Burt
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So I had some work done by r and r back in 2019. I had six piers put in and really enjoyed Corey the owner… fast forward to 2026 and the other part of my house started having weird sounds and a crack in my ceiling… I live on a hillside and tons of water comes my way and a user error with a downspout may have caused more issues… I made an appointment to have him come Out and do an inspection with a bid…. It’s pretty rare these days to not feel like you have gotten taken… Cory did all the measurements and well it appears the house is just settling. The house was built in 1980 by the original owners and was definitely not built straight. Anyway… Cory literally put me at ease and said. “Let’s just keep these measurements and check them out in a year or so. “He could have easily have just said… “yup. You need six piers….” He didn’t. I highly recommend r and r foundation… thanks for being honest… it goes a long way! Also… when I do need the work done… I, of course, will be using them!
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Philip Kogler
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House built in 1913 did not disappoint with challenges with a leaking foundation into the basement. But, R&R came through and I am able to feel confident that any further water issues are no longer. If the opportunity presented itself, I would hire them again.
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Julie Carlson
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I had them come out to my house to look at an issue of water seeping into my garage which is built into a hill. For reasons that have nothing to do with them, I didn't end up getting the work done. However of the four companies I had look at it, R&R's assessment was easily the most thorough. They are the only one that did any significant inspection outside of the building rather than just inside the garage and their prices were comparable to the other companies I checked out.
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Andrew Harpster
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Had R and R do some work on our older home that needed an update to the crawl space foundation posts a few years back. Work was accomplished in a timely and professional manner. Now in 2025, we are selling our home in a slow market and want to upgrade. We need to show the new buyers the application to transfer the foundation warranty ahead of the inspection in a few days as a show of good will to close the home. R and R's marketing manager, Jordan, was able to accomplish this promptly within one day for us and really set us up well to help close our home. While the foundation repair was important, it was years later, being able to connect with R and R again, and show the new buyers the work they had done and that it was done by a reputable company, that helped seal the deal.
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Christine Freitas
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We have had a great team from initial contact, proposal, work start, communication with office and project managers and crew all were courteous, kind, informative, and we rate them over the top.

Affordable Waterproofing Solutions

Financing Options for Wall Sealing

Protect your home from costly water intrusion with flexible financing for wall sealing services. Keep your basement dry and healthy without large upfront costs.

Financing Benefits:

  • Fast and hassle-free application
  • Flexible payment options to fit your budget
  • Plans available for all credit types
  • Immediate project scheduling after approval

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