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
Seattle Office
10111 S Tacoma Way d4,
Tacoma, WA 98499
Phone: +1 253 400 1850
Hours: Monday – Friday, 8am-5pm
Choose TerraFirma for Foundation Repairs Near Me 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.
Some of the most requested services
Terrafirma offers in Seattle, WA
Basement Crack Repair in Seattle & Bellevue
Cracks in basement floors are more common than you might expect in Seattle! The size and location of cracks can tell us a little more about what’s going on under your home.
Hairline Cracks in Basement are usually not a sign of structural weakness.
Cracks in Basement Leaking Water can be solved by our sump pump and drainage system solutions.
Heaving Crack in Basement suggests that the soil beneath the basement floor is expanding. When the soil becomes wet, it creates enough pressure to lift and crack a concrete slab floor.
When to Worry about Cracks in Basement – Cracks wider than 1/8″ should be sealed. Check out these 6 common basement crack problems.


Foundation Repair Contractors Near Me in Seattle
EverBrace & PowerBrace Wall Stabilization Systems reinforce and strengthen your Seattle home against further shifting and settlement
Helical Piles or Helical Piers are the top choice for stailizing Seattle homes with foundations shifting on wet, unstable soil conditions.
Whereas Push Pier Systems push supports all the way to the bedrock under your Seattle home.
Check out all our foundation piering systems here.
TerraFirma is not just your Residential Foundation Repair Expert…
We’re Seattle’s Top Commercial Foundation Contractor
for Commercial, Retail, Warehouses, Schools, Government Offices, and More
SEATTLE Homeowners Frequently Asked Questions
What types of cracks in my foundation or basement should I be concerned with?
Houses in Seattle, Renton and throughout the Pacific Northwest, are particularly susceptible to cracks. Common problems to stay alert for include horizontal or stair step cracking along the foundation wall, diagonal cracks in the corners, crumbling walls and inward bulges.
What’s the cost of foundation repair in Seattle and Bellevue?
Since every home is unique, each one requires a custom design and approach to repair. Our foundation experts in Seattle and Bellevue will inspect your home and create a custom plan that best suits your needs, detailing all costs. We offer free estimates to homeowners across the States of Oregon and Washington
How to fix a leaking basement floor?
Whether your home is in Seattle or Renton, when you have water coming through the floor or windows to your basement, the first step is installing a perimeter drain system. We can also install a direct drainage channel, which will help direct any water that comes through the crack into the drain and your sump pump.
How to repair a sagging crawl space in Seattle and Bellevue?
Many crawl spaces are designed with a support system that is either inadequate, rotting, or has unstable soils underneath its support posts. In many cases, a failing crawl space structure can be resolved by installing crawl space supports. This is a fast job that can provide permanent, warrantied results.
How to stop water from leaking through my basement windows?
If your basement is flooding due to window well leakage, the installation of a WellDuct Window Well Drain is a quick and affordable way to prevent a water-filled window well from flooding your basement.
What type of pier to use for foundation repair in Seattle?
Helical piers and push piers differ in their design and installation process. The choice between helical piers and push piers depends on factors such as soil conditions and structural requirements. As a general rule, helical piers are often preferred in areas with weak or unstable soil conditions.
Are you noticing damp drywall and carpet in your basement?
Don’t wait until the next heavy rain to protect your home from water damage. Musty smells, walls that feel damp to the touch, and ground-level leaks are all indicators that your basement may need to be waterproofed.
How to repair damaged concrete in Seattle?
Damaged concrete could be sealed with urethane caulk found at your local big-box DIY store, that is a solution prone to cracking, bubbling and drying out over time. The local experts at TerraFirma are here to help with long lasting solutions to seal your unprotected joints and cracked concrete.
What’s the best way to repair concrete?
Available to be installed year-round, the NexusPro solution offers several advantages over traditional concrete crack repairs. Its fast cure time (60 minutes) and performance under extreme temperatures makes it a perfect match for concrete repairs in Seattle, Kirkland and throughout the Pacific Northwest.
How to fix moisture issues in your crawl space?
Water that seeps into your crawl space can serve as a breeding ground for pests, mold, and odor. Crawl space encapsulation by TerraFirma can help you address crawl space issues ranging from poor drainage to damaged foundation.
How to protect my basement from leaking and flooding in Seattle?
An effective basement waterproofing system is essential to keep your basement dry and available for your specific needs. Regardless of where your home is located, when water gets into your basement, the sump pump is what protects you from a flood or any leaking that could cause expensive property damage.
What are the soil conditions in Seattle and Bellevue?
Expansive soils, present in the Pacific Northwest, absorb water and expand, exerting pressure against the foundation. Also common to the region are Consolidating Soils that shrink and compact. Houses built on hills or with a hot, southern-facing exterior are particularly susceptible
SCHEDULE A FREE
INSPECTION IN Seattle
We offer free inspections to homeowners throughout King County. Contact us today and make sure your home is in top shape!

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