Walls Waterproofing in Spokane, WA
Keep your basement and crawl spaces dry with expert walls waterproofing services in Spokane, WA from the trusted team at FHN Plumbing.
- Licensed & Insured
- Quick Leak Detection
- Prompt Water Damage Prevention
- Durable Waterproofing Systems
Damp Walls or Leaking Showers? Get Them Sealed in Spokane, WA.
Our team provides lasting solutions to keep your basement and crawl space dry, preventing costly repairs down the line.
Your Trusted Source for Walls Waterproofing in Spokane, WA
FHN Plumbing combines plumbing repair with waterproofing so you only pay once. Whether water is seeping from a failed shower pan, a leaking pipe in a wall cavity or irrigation soaking a block foundation, we fix the cause and seal the wall the right way.
Our expertise includes:
- Drainage system installation
- Sump pump and pit installation
- Interior and exterior wall sealing

Additional Plumbing Maintenance Services in Spokane, WA
Our maintenance and specialty plumbing services in Spokane, WA protect your home year-round and extend the life of every system.

Customers
Why Choose FHN Plumbing for Walls Waterproofing in Spokane, WA?
Choosing the right waterproofing contractor for your Spokane home is key for long-term protection. We use industry-leading techniques and high-quality materials for durable results.
- Quality Materials, We use long-lasting, proven waterproofing membranes and sealants for lasting protection.
- Lasting Solutions, Our team uses durable materials and techniques designed for reliable, long-term water protection.
- Experienced Crew, Our technicians are trained in the latest waterproofing techniques and safety protocols.
Citywide Coverage
No matter where you're located in Spokane, WA, you can count on FHN Plumbing for dependable walls waterproofing services. We're committed to providing consistent, high-quality protection across the entire area.
Experienced Team
The FHN Plumbing team has extensive experience tackling the waterproofing challenges Spokane, WA homes face. From minor cracks to major foundation leaks, our experts have the knowledge to deliver lasting solutions.
Safety-First Approach
All our waterproofing work is performed with meticulous attention to detail and in full compliance with Washington plumbing and construction standards. You can have peace of mind knowing your home is in safe hands.
Trusted Certified Spokane Plumbing Services Professionals
At FHN Plumbing, we take pride in providing licensed, certified plumbing services throughout Spokane, WA. Backed by recognized industry credentials, our experienced plumbers combine technical skill with genuine customer care. Whether it is repair, installation, or maintenance, we follow strict safety and quality standards to deliver lasting results you can trust.
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PHCC Plumbing Contractor Recognition
Better Business Bureau (BBB) Accreditation
Angi Certified Pro
ISO 9001 Quality Management CertificationLasting Walls Waterproofing Solutions in Spokane, WA
Exterior Block Wall Waterproofing in Spokane, WA
Block and stem walls often show efflorescence, which is the white mineral crust left when water passes through masonry. Irrigation and sprinklers aimed at the house are common culprits. We adjust or reroute irrigation, clean the wall and apply a breathable masonry sealer or elastomeric coating. Proper grading and drip line placement help keep the wall dry for good.

Crawl Space Encapsulation in Spokane
Crawl space encapsulation involves sealing the crawl space entirely with heavy-duty vapor barriers and often includes a dehumidifier. This not only waterproofs the walls but also controls humidity, stopping mold growth and wood rot in the crawl space. Washington has two very different climates, with long, wet and mild seasons in the west and hot, dry summers and cold winters in the east. An encapsulated crawl space can significantly improve indoor air quality and energy efficiency by keeping moisture from moving up into the home. We use durable, reinforced poly sheeting for walls and floors, sealed at all seams and penetrations.
Foundation Crack Repair & Sealing in Spokane
Even minor cracks in foundation walls can allow significant water intrusion. Our services include crack repair using epoxy or polyurethane injection to seal these entry points permanently. This method fills the entire depth of the crack, restoring strength and preventing water penetration. We address both vertical and horizontal cracks, knowing that horizontal cracks can signal structural issues that need a thorough assessment before sealing. Addressing these early prevents further water damage and costly future repairs.
Exterior Foundation Waterproofing in Spokane
Exterior foundation waterproofing involves excavating around the foundation to apply a waterproof membrane or coating directly to the wall. This is often the most effective method for preventing water from entering the basement or crawl space. We use high-quality asphalt-modified polyurethane membranes or polymer-based coatings that resist hydrostatic pressure and soil movement. Steep slopes and wet soils can move over time, which stresses buried sewer and water lines and sometimes separates joints. Proper drainage solutions, such as French drains, are also integrated to divert water away.
Shower Pan Leak Repair and Waterproofing in Spokane, WA
A cracked or poorly sloped shower pan often causes wet baseboards and stained ceilings below. We test the pan by plugging the drain and flooding it to verify the leak. Then we rebuild the pan with correct pre-slope, a new liner or bonded membrane and a properly clamped drain. A second flood test confirms the pan is watertight before tile.
Interior Walls Waterproofing in Spokane, WA
Interior walls waterproofing focuses on managing water that has already penetrated the foundation walls. This usually involves installing an interior drainage system, often called a French drain, along the perimeter of the basement floor. Water is collected and channeled to a sump pump, which then sends it safely away from the foundation. While not preventing water from entering the wall, it stops it from pooling inside your living space. This solution is less disruptive than exterior excavation and is suitable where exterior access is limited.
Waterproofing Costs vs. Repeat Water Damage in Spokane, WA
Waterproofing a shower or wall costs much less than repeated drywall, cabinet and flooring repairs. Ignoring moisture also invites mold, which can be expensive to remediate. A typical shower wall waterproofing project falls in the low thousands, while exterior block sealing varies with wall size. We give you a written quote so you can compare options side by side.

Foundation Crack Repair in Spokane
Even small cracks in your foundation walls can allow water to seep into your basement or crawl space. Our walls waterproofing service includes foundation crack repair using specialized epoxy or polyurethane injection techniques. These materials fill and seal cracks, preventing future water entry and often strengthening the foundation. Addressing cracks early in Spokane homes is crucial to avoid larger, more costly structural issues.
Walls Waterproofing Near Me in Spokane, WA
We are deeply familiar with the homes and ground conditions throughout Spokane, making us the right partner for your walls waterproofing needs. Our local experience means the solutions we provide fit your property and the local climate.
Our waterproofing crews are based locally, so we can inspect damp walls quickly and get repairs scheduled fast. We bring moisture meters and thermal cameras to every visit. That lets us give you answers the same day.
FHN Plumbing at a Glance
- Fully licensed plumbing team covering Spokane, WA
- Same-day appointments and 24/7 emergency response
- Upfront, flat-rate pricing before work begins
- 4.9-star rated by 382+ Washington customers
Spokane Map
Spokane Information
- Population
- 229,447
- Area codes
- 509/425/253
- Service area
- Spokane and communities within 40 miles
- Nearby
- Spokane Valley, Pasco, Richland, Kennewick
Effective walls waterproofing protects homes in Spokane, WA from rain, soil pressure on foundations, and the damp conditions that encourage mold growth in unsealed basements and crawl spaces.
Expert Services
Trust our professionals for reliable FHN Plumbing solutions in Spokane, WA.
Our Specialized Plumbing Services in Spokane, WA
At FHN Plumbing, we provide a complete range of plumbing services across Spokane, WA. From leak detection to full system installations, our team ensures fast, precise, and affordable service for both residential and commercial properties. Explore our core services below:
How Our Walls Waterproofing Process Works in Spokane, WA
We take a complete approach to walls waterproofing, with every step done with precision and care for your Spokane, WA property.
Request a Quote
Contact us at (425) 491-3131 to schedule a thorough inspection of your property. Our experts will assess your foundation, identify water entry points, and discuss your specific needs.
Thorough Inspection
We conduct a complete evaluation of your foundation walls, checking for cracks, signs of hydrostatic pressure, and existing drainage issues. This helps us design the most effective waterproofing plan.
Tailored Solution
Based on our findings, we propose a custom waterproofing strategy, which may include exterior coatings, interior drainage, or crack repair. We use proven methods and quality materials.
Frequently Asked Questions About Walls Waterproofing in Spokane
The cost of walls waterproofing in Spokane, WA can vary a lot, typically ranging from $3,000 for interior crack sealing to $15,000 or more for extensive exterior foundation waterproofing with drainage systems. Factors like the size of the area, severity of water damage, chosen methods, and accessibility all influence the final price. We provide detailed, upfront quotes after a thorough inspection.
Interior waterproofing addresses water after it has entered the foundation, usually managing it with sealants and drainage systems inside the basement or crawl space. Exterior waterproofing prevents water from reaching the foundation walls in the first place, usually by excavating and applying membranes or coatings to the outside of the foundation.
Yes. Our workmanship is warrantied, and many membrane systems carry their own manufacturer warranty when installed correctly. We explain the coverage in your written quote.
For extensive walls waterproofing projects involving excavation, structural changes, or major changes to drainage systems, a permit from the city of Spokane may be required. Simple crack repairs usually do not need a permit. FHN Plumbing will help you determine if a permit is necessary for your project and handle the application process if needed.
For extensive walls waterproofing projects that involve excavation, major structural changes, or changes to drainage systems, a permit from the Spokane building department may be required. We will advise you on any required permits and help with the application process so all work complies with local codes.
Walls waterproofing is generally not recommended as a DIY project due to its complexity and the high importance of a sound foundation. It often involves heavy excavation, specialized equipment, precise material application, and knowledge of drainage principles and local building codes. Improper waterproofing can lead to more severe and costly damage down the line, so professional help is highly advisable.
Sprinklers and drip lines aimed at the house are the most common cause. Heavy storms and poor grading also send water toward walls. Masonry absorbs that water and leaves mineral deposits as it dries out.
The duration of a walls waterproofing project varies depending on its scope. Minor crack repairs might take a few hours, while an interior drainage system could take 1 to 3 days. A full exterior foundation waterproofing project, involving excavation around the entire home, could take 3 to 7 days or more. We provide a clear timeline during our first consultation.
What People Are Saying About Our Plumbing Experts?

Emily R.
I called FHN Plumbing for plumbing repair, and the technician was fast, polite, and thorough. They explained the problem clearly and fixed it the same day. I will definitely hire them again. Highly recommended!
Plumbing Repair · Yakima, WA
Robert G.
The trenchless sewer replacement saved our front yard. They walked us through the camera inspection footage first so we knew exactly what we were paying for.
Sewer Line Replacement · Pasco, WA
Sofia M.
Two new toilets installed in one visit, no mess left behind, and the tech even adjusted a faucet he noticed was dripping. Fair pricing and really friendly.
Toilet Installation · Spokane, WA
Patricia H.
We had a slab leak that two other companies could not find. FHN Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Spokane Valley, WA
James P.
Our commercial plumbing system had a leak under the sink, and FHN Plumbing handled it professionally. The plumbers arrived quickly and restored everything without disruption to our customers.
Commercial Plumbing · Wenatchee, WA
Laura S.
I scheduled a water heater replacement, and the team made the process smooth and affordable. The new unit works perfectly, and they cleaned up after completing the job.
Water Heater Replacement · Kennewick, WA













