Foundation Contractors in Seattle | TerraFirma

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Foundation Contractors in Seattle

Leaking in basements and crawl spaces in Seattle and Renton, WA

One of the primary concerns associated with rain in Seattle and
Renton is water leaking into homes. Rainwater can seep through
roofs, windows, and foundations, leading to leaks, moisture damage,
and mold growth if not properly addressed. Homes with older or
poorly maintained drainage systems may be particularly susceptible
to leaks during heavy rainfall.

Foundation contractors in Seattle are ready to assist you. Here are the top services we provide to keep your home structurally sound.

TerraFirma protects homes from damp, wet basements and foundations around Seattle
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Preventing Flooded Basements

Basements are particularly vulnerable to flooding in Seattle. The key to preventing this is an efficient water management system.

Sump Pump

A sump pump is essential for homes with basements. It collects and pumps out excess water that gathers in a sump basin to prevent flooding.

Flood Drain

Installing a flood drain can save you from the nightmare of a flooded basement. It channels water away from your home, reducing the risk of water seeping in.

Establishing Moisture Barriers in Crawl Spaces

Crawl spaces become damp and moldy when they’re unprotected in wet climates. That’s why a moisture barrier is essential! Installing a polyethylene sheet on the ground and walls of your crawl space can prevent moisture from seeping in. This keeps the area dry and reduces the risk of mold and mildew, which can cause health problems and structural damage. 

Repairing Damaged Foundations

Cracks in foundations can occur due to various factors, including soil movement, shifting temperatures, and moisture changes. Over time, these conditions can cause the ground to expand or contract, putting stress on the foundation. Fortunately, TerraFirma’s foundation repair in Seattle can take care of these issues with the following techniques.

Foundation Reinforcement

Foundation reinforcement addresses cracks and weaknesses that develop over time. Steel or carbon fiber reinforcements can stabilize the foundation. This method is effective for handling the shifting soil conditions that are common in Washington.

Foundation Anchors

Foundation anchors provide additional support to homes with shifting or settling foundations. These anchors are installed deep into stable soil, holding the foundation in place. This technique is particularly useful in areas with loose or clay-heavy soil, which can cause foundations to move over time.

Choose TerraFirma for Foundation Repairs in Seattle

If you want your home to stand strong against Seattle’s relentless rain, TerraFirma is the way to go. Our team understands the unique challenges of the area, uses effective methods, and utilizes only high-quality materials for each job. Reach out to our foundation contractors in Seattle to keep your home safe and dry.

SEATTLE Homeowners Frequently Asked Questions

What types of cracks in my foundation or basement should I be concerned with?

What’s the cost of foundation repair in Seattle and Bellevue?

How to fix a leaking basement floor?

How to repair a sagging crawl space in Seattle and Bellevue?

How to stop water from leaking through my basement windows?

What type of pier to use for foundation repair in Seattle?

Are you noticing damp drywall and carpet in your basement?

How to repair damaged concrete in Seattle?

What’s the best way to repair concrete?

How to fix moisture issues in your crawl space?

How to protect my basement from leaking and flooding in Seattle?

What are the soil conditions in Seattle and Bellevue?

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INSPECTION
IN Seattle

We offer free inspections to homeowners throughout King County. Contact us today and make sure your
home is in top shape!

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SEE WHAT YOUR NEIGHBORS
HAVE TO SAY ABOUT US!

At TerraFirma we take pride in our work! We are trusted and referred by homeowners since 2005, to provide solutions for home foundations, basement and crawl space moisture, concrete leveling, and earthquake retrofitting.

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Google Rating
4.7
Based on 288 reviews
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Seattle
Homeowner
REVIEWS

Don’t take our word for it – see what our clients have to say.
Throughout the greater Seattle area, including Renton, Bellevue, Kirkland, Auburn, and beyond, our work speaks for itself

6/25/2024Seeing I did a review 2 months ago.. I am unable to make a new one- here is the update for the work we did!6/21-6/24/2024 Work started and completed by TerraFirma!We do not even know what to say, THANK YOU WILL NEVER BE ENOUGH, You all went Way above and beyond expectations. I added pictures.To the Friday crew, to install a piering system, Jake, Aden, Steven (sorry if I spelled it wrong) what can we say, from start to finish this team was a well oiled machine, worked really really well together, put up with my husband Mark and I and all our questions and chit chat. The time that was taken to ensure EVERYTHING was going right, was explained and to ensure the safety of our home was just awesome. We had a lot of fun with these guys in conversation and jokes. When all the work was done, you could not even tell anyone was at the house working all day. These 3 great guys were some of the most fun and charismatic group we have had at the house in years. 🙂 Last but not least.... Jake you are a wonderful teacher to the crew, you have great leadership and a pretty awesome work ethic.Monday with Robert for the leveling of the driveway, walkway and stairs to front door. Working for TerraFirma for 2.5 years, Robert showed much skill and patience, as he worked alone and took his time to ensure that the proper amounts of polyfill was being pushed into all the tiny little holes he drilled all over the place. A tedious process and Robert defiantly has the patience for this part. I asked lots of questions and was pleased with all the knowledge. Again, a crew member that went above and beyond to ensure that what we expected was completed.Robert's ability to close the gaps, level a drive way that had repairs 2 times prior and failed and seeing the garage door with no gapping really blew our minds! We truly could not be happier with the outcome. Towards the end of the day, Jon, a field Supervisor came by to help with the concrete work to fill in the pier holes in the garage. Jon was just the nicest and in the short amount of time he was at our home helping, he was knowledgeable and we had great conversation while he helped with the perfect concreate work! Looks good Jon, Thank you!My family and I would like to say, the longest part was waiting for permits once the work started, it went quick, it was done RIGHT, we are truly 100% satisfied with the outcome. Hands down will recommend TerraFirma to anyone that we know needs this kind of work done on their home.THANK YOU, THANK YOU, THANK YOU!******************************************************************original post:My family and I are just getting started and can not wait to see what the end results are. For now I am rating what I KNOW with 5 stars and wish I could give more. If the work, the work ethic, the understanding and the compassion towards customers follows through this entire project the way it has just begun, I will tell you, I will brag on this company all day long!!I came across TerraFirma at the Tacoma Trade show March 2024. I spoke with both Samuel and Tulane regarding the issues at our home in South Hill Puyallup. I filled out a form, was contacted later the following week to schedule a FREE Estimate and had Samuel come to our home. Thinking we would just show him a couple things and Sam would be in and out in 30 mins, my husband and I were almost confused and very IMPRESSED with the 2.5 hour inspection, overview, breakdown of cost and mapping per say of the work area for our home. We found out and were educated on the scale of " oh S**t that is going on and that there was more to our project than a sinking driveway. Sam was beyond respectable and patient 😉 especially when listening to my concerns and questions on the what is next... and the cost of the what's next.We have now put down our deposit for work to be completed, due to permits that are needed, work can be up to 4 months out now, so Pierce county, please hurry... ;-)From our family to TerraFirma.... we look forward to working with you all soon.
Seth Cunningham came to do an assessment of our home last week, he was friendly, easy to talk with, walked us through different options, and was great at communicating about next steps and what to expect. I particularly appreciated that he didn't use any scare tactics and I didn't feel pressured to make a decision.
We had great experience with Seth, he was polite, kind, communicative, and on time. Would highly recommend!
Installers were very professional. I asked for a few areas to be filled farther They made adjustments in areas that I asked gladly. I would recommend TerraFirm Foundation Systems to others. My back was out, the guys removed items from side of the house. Please give the installation team our thanksEverette
As a residential broker in western WA I’m always interacting with different foundation & basement specialists. TerraFirma is the best I’ve come across. The team there, especially Seth, is top notch. I always get an accurate & reasonable solution from them regardless of the size of the job. I’m working with Seth on a project now & it’s been great. Highly recommend!
A few days after moving into our home we noted some serious issues with our outdoor drainage.Over the course of just 2 days of rain in the Pacific NW, water was flowing into the garage and crawl space rather than away from the house.We needed an evaluation and a plan asap. Based on reviews and services available, a quick call to TerraFirma was the answer.I had an appointment within a few days. We were very pleased when Seth arrived and explained that, by the end of today’s visit we would have a detailed plan including the cost. As we walked around the entire foundation and yard Seth was open to questions and explained details of what he was noticing. Seth was also taking note of other potential issue that could be avoided with some preventive DIY care.The extensive evaluation resulted in great news. Although we knew it was going to be an expensive project, due to the labor involved, Seth presented an optimal approach for a permanent solution at a fair price.We were very happy working with Seth and TerraFirma.Steve and ToniShelton,WA
I had a positive experience with vapor barrier application to my basement walls, a draining system install that wraps around the basement walls, installation of a sump pump, foundation crack repair, sealing/ vapor barrier install in a crawlspace.
Samuel with TerraFirma did a great job diagnosing the issue and providing with options to fix. He was patient and answered all questions. I was impressed with the lifetime warranty for the work they do and seriously considering their services.
Seth came out to bid a project, replacing old wooden posts with steel. He was on time and very knowledgeable. He took his time making sure not to miss any details, which I really appreciated. Can't wait to get the work completed!
These folks are WORTH the call and having them out! Seth, specifically, was amazing at scope, plan and presentation. He was so knowledge and really took into account all of the needs of the house structurally and visually. He was extremely professional in house and on the phone. Nothing was over sold or up sold, and every concern I had was listened to and taken into account. Every detail was in the bid neatly and nothing was out of place. If you've got a basement or crawlspace project, this is as professional as it gets. I will DEFINITELY be keeping this company in mind for future projects and for friends and family. Call. Ask for Seth. He's got you.
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TERRAFIRMA IN SEATTLE

With over 20 years of experience fixing foundations, basements, and crawlspaces, we know Seattle.
Maybe a little too well. Read on to find helpful homeowner tips, case studies, and before & after galleries
from our worlk in Bellevue, Redmond, Renton, and beyond.

Schedule your free
Foundation Evaluation

Schedule your free
Foundation Evaluation