Local Family Business

We provide a permanent and complete mold and water control solution, with a lifetime guarantee. We offer basement flooding and waterproofing services in the greater Seattle area.

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Our Solid Reputation Means Everything To Us

Flooded basement? These are your guys! With the record setting rain in Seattle in the last year, we unfortunately experienced a bunch of flooding in our finished basement and were left very unsure of how to manage; we reached out to several "waterproofing" companies and we received various responses from plumbers, foundation contractors and so-called "water cleanup experts...
Kim R.

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My family hired Wet Basement Services last year when our basement flooded after a particularly heavy rain storm. After calling numerous companies (all of who were booked out for weeks) I was so lucky to find Wet Basement Services. They were busy as well, but they were able to come out after a couple of weeks. John quickly identified the issue and recommended the best system for us that also...
Jean D.

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We don’t always do a great job letting people know when something is working well…unfortunately, we always let them know when it’s not.

So, we wanted to reach out to let you know that ALL your systems installed in June of 2022 at our home in Wallingford are functioning well under pressure…literally 😉 We’ve heard, but are not overwhelmed by the sound, of both submerged pumps...
Catherine H.

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We had WBS come out in early 2022 to install a sump pump and drain tiles in our basement during a house remodel. They were quick and accommodating to our needs and explained everything to us as they worked. Our house is on a high water table (which we did not know when installing the pump), so during heavy rainfall in December of 2023 we noticed the concrete where the tiles were...
Brent T.

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I couldn't be happier with the exceptional service and outstanding results I received from Wet Basement Services. I am a first time home buyer and got myself in a pickle where I purchased a very old house that had a previous water leaking issues in the basement. As someone who had very little knowledge on homes and understanding this was a huge issue, I received estimates from around 10 different vendors...
Kenneth B.

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Had a great experience with these guys; they were up front about our various options, how disruptive they were, and the total cost. I felt like I had all the information I needed to make a good, informed decision. The actual work was done exactly on schedule and for a very reasonable price. Very happy with everything: ease of getting a quote, options offered, speed and quality of work just all around a great experience...
Michael W.

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I highly recommend this group. They took care of water intrusion in our basement. They took the time to studied the problem, and in our case went the extra effort to figure out how to problem solve because we had a challenging set up with floor radiant heating.

They also gave me a competitive bid. Make sure you ask them to quote for the backup battery for the pump, which I recommend.
Mario G.

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Having my basement fixed by Jersey and John was one of the best decisions I’ve made since becoming a homeowner. Every time it rains, I’m so relieved we don’t have to worry about the basement retaining water.

Jersey was so quick with his estimate, and John and his team were thorough, reassuring and easy to communicate with throughout the process. I’m so grateful for the...
Brittany C.

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Family History

Wet Basement Services is the division of Greenwood International that deals specifically with wet basements and homes and mold related issues. The owner, Jerzy Radka, founded this division after his wife was diagnosed with cancer, directly related to mold in the home where she grew up. Embarking on a personal mission to help families realize the dangers of mold and the importance of addressing mold growth before it leads to serious health consequences, Jerzy created EWA, a one-of-a-kind PERMANENT mold-control system....

Wet Basement Services begins with stopping water problems, but the work doesn’t stop there… WBS addresses the real threat posed by un-abated water problems: mold and decay!

Jerzy realizes the importance of permanent mold control and wants to help as many families as possible avoid mold-related health tragedies – not only through his services but also through education and awareness. The WBS website provides a variety of educational materials. In addition, it offers FREE emergency water advice that connects users directly with Jerzy, whose master’s degree in engineering and decades of experience in dealing with mold issues makes him uniquely qualified to help.

Our Holistic Approach

Mold Control

Evidence-based inspection is a staple of our company's modus operandi. Hydrology is a complicated science as well as biology and organic chemistry of mold-related issues. We, as Interior Environmental Professionals, serve our community with knowledge and experience.

Water Control

Leaking and flooding basements can lead to hazardous mold growth, major health issues and costly home repairs. Rock solid solutions of which you have my personal guarantee, and I back it up with a Lifetime Transferable Warranty.

Client Experiences

(which were vendors that relied on a large wet vac to clean up water but provided no actual solve). After speaking to a dozen companies (and having half a dozen of them swing by) we were almost set on selecting a vendor who required that we demo the walls of our entire basement, in walks Jerzy from Wet Basement Services! Asides from explaining EXACTLY HOW he was going to fix the issue, he also brought a presentation deck that outlined the science OF WHY this was occurring in the first place. He then directed us to his website to see detailed photos of the construction process with further information regarding water table and hydrostatic pressure. To prep, we simply had our own contractor partially demo HALF of our finished basement. The construction process went smoothly! Asides from trenching and installing a proper drainage system, the crew also installed a sump pump. John, the PM/Lead on our project, was polite, personable and most importantly, made himself available to answer calls and all of my questions. He and his crew came in and did all the work over the course of three (3) days and they left the jobsite cleaner than when they began. With an owner lifetime guarantee, I'd say they have one of the best warranties in the business. Here's to seeing how well it went the next time we get some major rain - but I have no doubt that in the unlikely event of any issue, John and Jerzy would offer assistance without reservations.

Kim R.

5 / 5

different vendors. I was surprised on how little knowledge a lot of these vendors had on water intrusion and many of these vendors suggested solutions that go against city codes. John from Water Basement Services came by and his knowledge blew everyone else out of the water. Other contractors asked me where and how the water was coming in (which I had no idea) while John was able to provide his expert opinion on the cause and was able to talk about his solution and even was able to explain why his solution was better than competitors I brought up. John cares about the quality of his work and understands that he is supporting the community in Seattle vs other companies who just want to get the job done and get out.

I am very satisfied with the waterproofing work (Interior French Drain + Sump Pump) that they installed in the basement. I also had them do some framing (drywall) and help get me closer to finishing my basement. Jerzy, the owner who is great guy, also installed a beautiful ledge surrounding the framing and they also installed trim on the stairs which is beyond what I asked for.

My basement is now a usable, dry space, and I owe it all to their expertise. It gives me a great peace of mind and helps me sleep a little better at night. I highly recommend them to anyone in need of basement waterproofing services.

Kenneth B.

5 / 5

fully briefed on the job to be done, and they worked hard the whole time they were here. The crewmembers were masters of every job they had to do, including an awesome job of restoring a finished basement to its original state. We were amazed that it could be done! We were happy because they were very willing to tell us what was going on and how they were doing it as well as answering a million questions.

We have been through over an inch of rain since they completed work and not a drop has come into the basement.

Anyone with a residential water problem should start with Wet Basement Services to get straight answers from someone with a sound engineering and hydrology background.

Chuck & Becky C.

5 / 5

Jerzy Interior Environmental Professional

Professional Expertise with Permanent Solutions

Experience without knowledge is blind! I am Jerzy Radka, owner and founder of WBS working in the waterproofing and mold control field since I graduated with a Master's in Forestry and a postgraduate in Environmental Protection in 1983. My company has proven solutions to your water and mold issues. Rock solid solutions of which you have my personal guarantee, and I back it up with a Lifetime Transferable Warranty

Mission and Knowledge Based Company

Evidence-based inspection is a staple of our company's modus operandi. Hydrology is a complicated science as well as biology and organic chemistry of mold-related issues. We, as Interior Environmental Professionals, serve our community with knowledge and experience to permanently resolve water intrusions and mold-related problems in any building basement.

Family Owned and Operated

We are family owned, knowledge-based and mission-driven local company, with thousands of happy clients with ongoing relationships. When we give you our bullet-proof warranty we enter into a relationship with you, and we have your back covered no matter what. Don't need to count on our word for it - ask our clients. We will provide you with a contact list.

Your Home Is At Risk Of Water Intrusion

Are there any new apartments or housing developments built within last three years in your area? Are the gutters and downspouts functioning well? Have you noticed some cracks or settlements in the house foundations or steam walls? If you answered yes to any of these questions, your home could be at risk of water intrusion – with devastating results.

The best protection against such a disaster is PREVENTION! Contact us for consultation!

Your Home Is At Risk Of Water Intrusion

Moreover, once water has eroded a path into your home it is unstoppable. Reoccurring flooding will occur and the resultant mold and fungi growth are now your number one concern. If you want to save a lot of money and time, don’t call “Water Damage Restoration Services”. They only suck up water and dry the area temporarily leaving you with a hefty bill (sometimes 5-digit one) and still leaving you with a headache of unresolved problems. Run to a local hardware store or rental place and get blowers and humidifiers. This would save you money that you will need to use for installing a permanent solution.

Don’t panic! Contact us IMMEDIATELY!

Your Home Is At Risk Of Water Intrusion

extreme water abatement. We’ve helped clients who suffered for decades from winter flooding of their basements. Our system desaturates liquefied soils under your house footings and basement floor slab. This solution is different than most drainage systems of our local competitors, which act only like a “band aid”, and not address real sources of the issue you have. We will be happy to elaborate on it when we meet together when you schedule your Free Inspection.

Our systems will cure your headache PERMANENTLY!

Lifetime transferable warranty on our interior basement waterproofing services.

Interior Water Control Service

Our interior waterproofing system, uses membranes and French drains placed along foundation footings and basement steam walls, thereby encapsulating the basement from the outside. We place new drainage pipes at the side of the footings and cover them with P-gravel and drainage fabric, which redirect water to the exterior by using gravity or a sump pump. This is a highly effective and cost-efficient way to control water intrusions. Interior waterproofing can be done faster than exterior waterproofing.

Water Intrusion Issues?

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Exterior Water Control Service

Our exterior waterproofing consists of excavating foundation walls to the bottom of the footings. Once the area is excavated, the walls are covered with exterior membranes, like Delta or Mira drains, which expand drainage areas to all layers of the soil profile. In addition, we may seal the dry walls with waterproofing solution. At the side of the footings, we install new drainage pipes wrapped in drainage fabric and cover the drain pipes with P-gravel, apply a layer of landscape fabric on top of the pea gravel and drainage, then back fill trench with soil.

Water Intrusion Issues?

Free Inspection and Quote

We Have The Answers

Shield your home from water intrusion for life. Guaranteed!

Our proprietary Extreme Water Abandonment (EWA) system – provides a permanent and complete water control solution, with a lifetime guarantee. We offer basement flooding and waterproofing services in the greater Seattle area, including Redmond, Kirkland, Bellevue, Renton, and other suburbs.

Waterproofing basements
Relieving hydrostatic pressure under concrete slabs and foundations
Restoring basement walls and floors

Contact us for a free inspection and estimate.

Licensed, Bonded and Insured – Contractor No. GREENIL992BA