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Our Services

  • Concealed drainage system
  • Powerful, reliable sump pumps
  • Battery backup systems
  • Patented waterproofing products
  • Energy-efficient dehumidifiers
  • Industry-leading warranties

Basement Waterproofing Companies in Washington

4137 E. 3rd Avenue
Post Falls, ID 83854
SERVICE AREA:
NW Idaho: including Pinehurst, Coeur d'Alene and Sandpoint.
NW Washington: including Spokane, Cheney and Furport.
View company profile for reviews, awards, before & after photos, and more.
18931 59th Ave NE
Arlington, WA 98223
SERVICE AREA:
NW Washington: including Everett, Mt. Vernon, and Bellingham.
View company profile for reviews, awards, before & after photos, and more.
5883 State HWY 303 NE Suite 101
Bremerton, WA 98311
SERVICE AREA:
NW Washington: including Bremerton, Shelton, and Port Angeles.
View company profile for reviews, awards, before & after photos, and more.
761 NE Garden Valley Blvd.
Roseburg, OR 97470
10111 S Tacoma Way D5
Tacoma, WA 98499
2001 NE 117th ST
Vancouver, WA 98686
13110 SW Wall St
Portland, OR 97223
SERVICE AREA:
Southern and NW Oregon: including Medford and Roseburg.
SW Washington: including Seattle, Tacoma, Olympia and Kent.
View company profile for reviews, awards, before & after photos, and more.

Each of the companies listed here is an authorized Basement Systems dealer in Washington offering expert basement waterproofing services including drainage and sump pump installation. In each company profile, you can read reviews and check out the contractor’s history, service area, ratings, and more.

Choosing a Reliable Waterproofing Company for Your Washington Basement

Having a wet basement is not fun to deal with. The risk of property damage and costly repairs all add to the stress of dealing with a damp basement. If you are suffering from constant worry about the health and safety of your basement, it’s time for a change.

Unlike other home improvement tasks, basement waterproofing isn’t a DIY project. An experienced, licensed basement waterproofer is equipped to properly diagnose basement issues. Whether it be pooling water, gaps in your foundation, leaky basement windows, or high humidity levels, a professional basement waterproofer will be able to detect such issues and provide a long-lasting solution. Don’t wait until your basement becomes a breeding ground for mold, pests, and other hazardous conditions. Contact your local Washington basement waterproofer today.

Look for expertise, training, and experience.

By choosing a basement waterproofer in the Basement Systems network, you’re getting a local company dedicated to the best waterproofing practices. Each contractor listed here is trained in the diagnosis of sub-grade moisture problems as well as the design and installation of proper drainage, moisture and humidity control, and basement materials. All Basement Systems contractors are licenced and certified to fix wet, damp basements and crawl spaces. You can assure your wet basement issues are a thing of the past with this kind of expert service! 

Demand high-quality basement waterproofing products.

Since 1987, Basement Systems has set the industry standard for dry basements. Your Washington Basement Systems dealer has exclusive access to 27 patented products that have helped homeowners over the past 30 years keep their basements dry. Such solutions include our WaterGuard basement drainage system,  UltraSump industrial-strength sump pump, and our SaniDry Sedona Basement Dehumidifier.

Other basement waterproofing products include basement wall and floor treatments, window wells, and basement window replacements. Browse the full line of basement waterproofing products.

Why Do Washington Basements & Crawl Spaces Get Wet?

Flooded basement: When it comes to precipitation, the state of Washington has some of the rainiest regions in the world. Seattle, for example, has a reputation for frequent rain, with an average of more than 150 rainy days. This can easily lead to flooding. When flooding hits your area, your basement is most likely to be the prime target for water damage.

Other wet basement signs: There are many possible sources for pooling water, damp basement walls or flooring, and high humidity. These include: rusty basement windows, poor grading around the foundation, leaks through cracks in the foundation, saturated soils, simple plumbing failures, and poorly functioning drainage or sump pump systems. A basement already musty and damp is ill-prepared for the next bad rainstorm! Basement waterproofing can address the underlying issues, prevent future water damage and improve the indoor air quality.

Basement Waterproofing & Crawl Space Repair

Waterproof your wet basement today! Basement Systems experts in the Washington area have helped homeowners for decades with their basement water issues. From identifying the source of leaks, flooding, groundwater seepage, and musty odors, our wide range of waterproofing and moisture control solutions have helped homes in Washington stay healthy and dry even in the toughest of storms. 

Wet Basement Solutions:
  • Basement Waterproofing
  • Crawl Space Encapsulation
  • Leak Basement Window Repairs
  • Exclusive Drainage & Moisture-Control Products
  • Industrial-Strength Sump Pumps 
  • Energy-Efficient Self-Draining Dehumidifier    
Dry Basement and Crawl Space Benefits:
  • Usable Basement or Crawl Space
  • Healthier Indoor Air
  • Mold, Dust, and Pest Reduction
  • Lifetime Transferable Warranty
  • Home Value Protected
  • Peace of Mind When It Rains!

Next Steps to a Safe, Dry Basement in Your Washington Home.

Basement Systems products address every major basement or crawl space problem, including moisture intrusion, flooding, leaky windows, structural rot, and excessive humidity. The best basement waterproofers for your Washington home are those who can diagnose the source of the problem and have the training, expertise and experience to design and install an effective system that keeps your basement dry.

1) Read Reviews & Check Out Past Work

Spend your time reading through the reviews of the basement waterproofing companies listed here. Check out their profiles that highlight their work (before and after photos), awards, and experience.

2) Get inspections and cost quotes

Call or fill out the Free Estimate form to set up an inspection of your basement. When you choose Basement Systems authorized contractor, you’ll get a free book on how basements are constructed and why they get wet, a custom design solution, and written estimate at no charge.

3) Choose Your Contractor & Enjoy the Result!

Choose a basement waterproofer based on the proposed solution, quality of materials, reputation of the contractor, and the price. Remember you only want to waterproof your basement once! After the work is completed, enjoy your dry basement for storage, finishing, laundry, and entertainment.

Washington's Trusted Waterproofing Companies

Testimonials

  • Thanks for all your hard work. Read Full Testimonial
    Eileen K.
    Sandpoint, ID

    Customer Testimonial

    Eileen K.
    Sandpoint, ID
    Thank you for all your hard work on my basement project. Your crews have been wonderful to work with. The office staff has been helpful and great as well. I will highly recommend your company to anyone who asks. I feel like I've made new friends as well. Thank you Eileen Keller
  • I have been completely impressed with how everyone at Rainy Day has communicated with us about everything... Read Full Testimonial
    Sherman B.
    Sultan, WA

    Customer Testimonial

    Sherman B.
    Sultan, WA
    I have been completely impressed with how everyone at Rainy Day has communicated with us about everything they planned to do. From the first sales call until the final day of work. Everyone went out of there way to make sure we knew what to expect next. The operations manager came out at the beginning of the project, and a job this big is definitely a project and went over the work one more time and gave us a rough schedule on when they expected to get the work done. He also kept us updated on the crews schedule on a daily basis because they were facing some unexpected weather challenges due to snow in the area. We had a couple of crews involved in the project and the foremen of each crew made sure we knew just what they were going to be doing that day when they arrived and then what they had accomplished just before they left in the evening. The only thing I would like to see is to have the operations manager come by one last time after the work was completed and inspect the final installation. I recently had a new roof put on by a small roofing company in the area and after the job was completed the owner of the company came out and inspected the work and found a few (very few) items he thought needed correction and had someone come out and fix them. I really appreciated that extra care since I am far from an expert on roofing. The same applies here with the crawlspace and the Rainy Day material. I'm far from being an expert on this part of our home so one last look at the work by someone who is would be awesome. Bottom line is I think the system should be very helpful in controlling both moisture in the crawlspace and therefore the house and in controlling rodents that are a constant issue when you live in a rural area with woods and fields surrounding the house.
  • Looks great, nice clean work. Dan seemed trustworthy. Trusted our referral also. Happy with the job :) Read Full Testimonial
    Renee and Patrick M.
    Arlington, WA

    Customer Testimonial

    Renee and Patrick M.
    Arlington, WA
    Looks great, nice clean work. Dan seemed trustworthy. Trusted our referral also. Happy with the job :)
  • We are so pleased with our crawl space insulation. It's been almost a month now and we have noticed a... Read Full Testimonial
    Terry W. & Dennis I.
    Arlington, WA

    Customer Testimonial

    Terry W. & Dennis I.
    Arlington, WA
    Dear Rainy Day people, We are so pleased with our crawl space insulation. It's been almost a month now and we have noticed a difference. It's a subtle thing, but the house seems to hold the heat better and the air inside seems cleaner. We expect the improvement to be even more noticeable as the days and nights grow colder. We learned a lot from Lawrence Janesky's book, “Crawl Space Science. We haven't given much thought to the question of humidity before. Now we have been alerted, and we just bought a new hygrometer so we can see what's happening. I always thought our house was pretty dry, but so far it looks like it's hovering in the high range of ideal temperature, around 60% when it's around 80% outside. We'll watch and see what happens this winter and next spring. It's nice to know about the SaniDry system in case we want to install one later on. In all, we had a great experience with your team. Office staff was friendly and helpful. Zachariah came out to our place to design the system and give us an estimate. He kept us informed about what could be done and why. Daniel and his crew did an excellent job in just two days. Rosalino and Juan deserve extra credit for spending a whole day in our musty, dusty crawl space cleaning everything out. Jordan joined the crew for the actual installation work the next day. Daniel oversaw everything, replaced a ladder for us, took photos, and kept us informed. By the end of the second day, the installation was complete, the whole area was cleaned up, and the house and yard looked just as it did before. We are very impressed with your team. good work! Many thanks to everyone on the Rainy Day team. Yours sincerely, Terry W. & Dennis I.
  • We are writing to you to tell you how pleased we are with your company! Jean-Paul did a great job explaining... Read Full Testimonial
    Robert and Barbara B.
    Arlington, WA

    Customer Testimonial

    Robert and Barbara B.
    Arlington, WA
    To The Whole Team at Rainy Day:We are writing to you to tell you how pleased we are with your company!Jean-Paul did a great job explaining all the services that you had to offer. He was very patient with some upgrades we decided on after we signed the contract. He always got back to us promptly. Just overall a great guy to deal with! We were so impressed with him that we did not even shop around to any other companies.Scheduling was easy with Niki. She is always very pleasant to deal with on the phone.Jessica was very friendly and helpful with our changing contract with some upgrades.The team that came out consisted of at times Wyatt, David Nush, Josh, and Derek. They were all very professional, energetic, helpful, did a great job keeping the job site tidy, and moving forward.David Nush was very patient with our questions. He did a great job explaining the process to us and what was going to happen each day. He made the process run smoothly every day.We had some concerns with the noise level on the SaniDry Sedona was installed and we happened to be at The Home Show last weekend which you guys had a booth at. We spoke to Zachariah Milligan. After listening to us he instructed us to contact Niki to get someone out to check out the system. He also did a great job answering some lingering questions.We called first thing today and Niki had Daniel Mcllvain give us a call. He came out to inspect our system. He made some minor adjustments. He also explained the system to us a bit better.Overall from start to finish, we are very extremely pleased! Sincerely;Robert and Barbara
  • "It has been the best home improvement I have made on my house since I bought it. I used to be totally... Read Full Testimonial
    Alex S.
    Sedro-Woolley, WA

    Customer Testimonial

    Alex S.
    Sedro-Woolley, WA
    "It has been the best home improvement I have made on my house since I bought it. I used to be totally afraid, every time it would rain, my basement would flood, and since the put the basement system in, I not only not worry anymore, but I actually enjoy the sound of the rain again...my whole house smells better, everything is dry, everything works in order, and the customer service has been just absolutely unmatched. Anytime I have a question or concern, they are super quick to get back to me, super quick to take care of me, can't recommend them enough."
  • Zach was so patient, so magnificent, so incredibly informative, and showed me all kinds of stuff on his... Read Full Testimonial
    Denise Z.
    Sedro-Woolley, WA

    Customer Testimonial

    Denise Z.
    Sedro-Woolley, WA
    I'm in Alger, and a gentleman named Zach came here today. I am so grateful for all the information that you sent ahead of time. I studied it the best I could, and Zach was so patient, so magnificent, so incredibly informative, and showed me all kinds of stuff on his computer screen. It'll probably take me like years to do the best that I can do with everything that needs to be done, but I have never had a workman come out here that was so gracious, understanding, and completely taken in by what needs to be done and forwarding that information to a gal that only picks up fabric colors and materials and stuff like that. Totally out of my element with this stuff, but he made it simple so that I can make a really good decision. Thank you so much for sending him to me. Thank you for everything that you guys do. You're really part of the solution.
  • VERY satisfied. Thank you! Professional, courteous and friendly; a top-notch crew. All experiences were... Read Full Testimonial
    Cindy and Bob S.
    Lake Stevens, WA

    Customer Testimonial

    Cindy and Bob S.
    Lake Stevens, WA
    VERY satisfied. Thank you! Professional, courteous and friendly; a top-notch crew. All experiences were pleasant.
  • We were very pleased with the crew. Jerry had a “teacher’s heart” as he explained... Read Full Testimonial
    Jeff and Elizabeth T.
    Snohomish, WA

    Customer Testimonial

    Jeff and Elizabeth T.
    Snohomish, WA
    We were very pleased with the crew. Jerry had a “teacher’s heart” as he explained everything to me. He was very knowledgeable. Also, I was thrilled that they went above and beyond what was contracted in helping me design and dig the outlet trench. Dan you run a fantastic operation! Thanks!!!

Have Basement Systems solve your basement or crawl space water problem. From the Coastal Region to the Puget Sound Lowlands, Cascade Mountains to Okanogan Highlands and Columbia Plateau, your local Washington basement experts will be happy to help transform your wet, leaky or humid basement into a usable, dry, healthier space today! 

Improve your home starting with a free basement inspection and estimate!

You wouldn’t call a plumber to reroof your house. Don’t call a handyman to fix a wet basement. Call in the specialists who have been revolutionizing basement waterproofing since 1987. Basement Systems and its network of dealers have solved wet basement problems for hundreds of thousands of homeowners throughout the United States, Canada, the United Kingdom, and Ireland. As a Basement Systems dealer, we offer a system that consists of patented products and proven techniques that aren't available to other contractors or handymen. Allow us to show you why it’s the leading waterproofing system in the world. Whether you simply want to use your basement for storage and a laundry, or are planning to convert it to living space, the first priority is to make sure it’s dry. We can help. 

Customer Reviews

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    By Judith &.
    Dallas, OR
    Just improve the communication between the front office and...
    View Review

    Customer Review

    full starfull starfull starfull starfull star
    By Judith &.
    Dallas, OR
    Just improve the communication between the front office and the customer
  • full starfull starfull starfull starfull star
    By Joyce M.
    Salem, OR
    Overall very professional, customer oriented, clear in...
    View Review

    Customer Review

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    By Joyce M.
    Salem, OR
    Overall very professional, customer oriented, clear in explanations of what is needed. Both salesperson and crew were very pleasant and easy to communicate with.
  • full starfull starfull starfull starfull star
    By Ronan F.
    WA
    Our experience with TerraFirma was great from beginning to...
    View Review

    Customer Review

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    By Ronan F.
    WA
    Our experience with TerraFirma was great from beginning to end. They were very fast, efficient, clean and courteous. We had the crawlspace encapsulated and our whole house smells and feel better. No more mold and bowed floorboards. And they were cheaper than the competitors.
  • full starfull starfull starfull starfull star
    By Tom G.
    Anacortes, WA
    Dan did a great job explaining the system along with the...
    View Review

    Customer Review

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    By Tom G.
    Anacortes, WA
    Dan did a great job explaining the system along with the different options. We knew right upfront what the final price would be so there were no surprises.  
  • full starfull starfull starfull starfull star
    By Cathy S.
    Coeur D'Alene, ID
    The dry-wall crew was great also! Everyone was very clean...
    View Review

    Customer Review

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    By Cathy S.
    Coeur D'Alene, ID
    The dry-wall crew was great also! Everyone was very clean and professional. This is actually my daughters house and she is very picky. She is very happy with the results!
  • full starfull starfull starfull starfull star
    By Lynn
    Coeur D Alene, ID
    I am well pleased with the work your company provided.
    View Review

    Customer Review

    full starfull starfull starfull starfull star
    By Lynn
    Coeur D Alene, ID
    I am well pleased with the work your company provided.
  • full starfull starfull starfull starfull star
    By Barbara N.
    Post Falls, ID
    I needed the project to wrap up by 5:30 p.m., at the very...
    View Review

    Customer Review

    full starfull starfull starfull starfull star
    By Barbara N.
    Post Falls, ID
    I needed the project to wrap up by 5:30 p.m., at the very latest. They ran over, and I was an hour late to a meeting. I'm glad they finished, and I was forgiven for being late.
  • full starfull starfull starfull starfull star
    By Kay B.
    Newman Lake, WA
    Everyone was very professional and great customer service!
    View Review

    Customer Review

    full starfull starfull starfull starfull star
    By Kay B.
    Newman Lake, WA
    Everyone was very professional and great customer service!
  • full starfull starfull starfull starfull star
    By Jeff S.
    Greenacres, WA
    Prompt, professional and courteous
    View Review

    Customer Review

    full starfull starfull starfull starfull star
    By Jeff S.
    Greenacres, WA
    Prompt, professional and courteous
Click to see why people hire us

Recent job requests for basement waterproofing in WA:

Project Location: Medical Lake, WA 99022

Comment: We are having some water pooling in our unfinished basement

Project Location: Lake Stevens, WA 98258

Comment: Wet basement. I also have uneven floors.

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