Foundation, Crawlspace & Concrete Contractors in Burien, WA
Terrafirma in Burien, WA
At TerraFirma, we specialize in safeguarding and strengthening the structural integrity of homes throughout Oregon and Washington. For years, we’ve been proud to serve homeowners in Burien, helping them address the area’s unique climate and soil challenges.
From a cracking foundation to a musty basement, a damp crawl space, or an uneven concrete slab, TerraFirma has the know-how, tools, and reliable solutions to restore your Burien home and ensure its safety for years to come.
Burien’s TOP-RATED Foundation & Basement Contractors
Contact us at (866) 486-7196 or use the form to the right.
Hours: Monday – Friday, 8am-5pm
Foundation Repair Burien
Foundation problems can lead to significant damage to your home if not taken care of promptly. Homeowners in Burien, WA, may notice signs like cracks in the floors, bowing walls, or sagging floors, which could indicate more serious structural issues. You might find that doors are sticking, windows won’t close right, or there are visible gaps between walls and ceilings—all of which can be indicators of a shifting foundation due to soil movement, water damage, or simply the wear and tear of time.
At TerraFirma, we specialize in foundation repairs right here in Burien, delivering expert solutions that address the specific cause of your foundation issues. Our process starts with a thorough inspection to identify the extent and source of the problem, after which we’ll recommend one or more of our trusted foundation repair systems.
Foundation piers
In Burien, WA, our push and helical piers are designed to effectively stabilize and lift your foundation by transferring its load to deeper, more stable soil. Helical piers are perfect for areas with known soil conditions, while push piers are ideal for regions with uncertain soil stability. Both systems are minimally invasive and provide lasting solutions for your foundation needs.
Wall Stabilization Systems
For cracked, bowing, or leaning walls, we offer a suite of reinforcement products. These include:
- CarbonArmor®: Made from fiber-reinforced polymers ten times stronger than steel.
- PowerBrace®: Zinc-plated steel beams that can be tightened over time.
- GeoLock® Anchors and Helical Tiebacks: These systems halt inward movement and gradually straighten walls over time.
- EverBrace™: Designed for severely deteriorated walls, this system replaces and reinforces failing foundation walls with steel supports.
We also offer grouted micropile tiebacks for difficult soil conditions, SmartJack® crawl space support posts for sagging floors, and vapor barriers to manage humidity and prevent further moisture damage.
Every solution comes with expert installation, flexible maintenance options, and transferable warranties, ensuring you feel confident and at peace in your Burien home.
Basement Waterproofing Burien
Dealing with a damp basement in Burien, WA? It can cause mold, mildew, structural issues, and even poor air quality in your home. Look out for signs like musty odors, stained walls, pooling water, or efflorescence—a white, powdery residue that appears when water evaporates. Remember, even a tiny crack in your basement wall could turn into a significant source of moisture.
TerraFirma provides top-notch basement waterproofing solutions in Burien, ensuring your space stays dry, healthy, and functional, no matter the weather.
Crawl Space Repair Burien
Crawl spaces in Burien are frequently forgotten, yet they’re essential for your home’s stability and air quality. If left unattended, these spaces can become breeding grounds for mold, pests, and standing water. This can lead to wood rot, unpleasant odors, and even health concerns for you and your family.
At TerraFirma, we understand the unique crawl space challenges in Burien, WA. Our expert repair services tackle moisture, mold, pests, and sagging floors with complete encapsulation, effective drainage solutions, and sturdy structural support.

Encapsulation & Drainage
We begin by sealing the crawl space with our VaporLoc Elite liner, a 120-mil thick waterproof barrier that blocks moisture, soil gases, and allergens. To ensure proper drainage:
- We use drainage matting under the liner to guide water to your perimeter drain or sump pump.
- Sump pumps remove water quickly and efficiently, even during heavy rain or high water table conditions.

Crawl Space Entry & Vent Solutions
- EverLast™ Doors & Access Wells: Waterproof, durable entry systems that keep out pests and moisture.
- Turtl™ Access Well: An attractive, lockable access solution in several colors.
- Vent Covers: Sealing crawl space vents prevent outdoor air, moisture, and insects from entering.
Crawlspace repair in Burien is crucial to maintaining your home’s overall health and energy efficiency.

Structural Repairs
To support sagging or weak floor joists, our SmartJack® Support Posts offer adjustable, galvanized steel columns that restore floor stability. These are fast to install and offer permanent results.

Dehumidifiers & Monitoring
Install a SaniDry Sedona dehumidifier to maintain healthy humidity levels year-round. For added security, our ShipShape™ System offers 24/7 performance monitoring, proactive maintenance alerts, and remote control of your crawl space systems.

Concrete Repair Burien
Damaged, cracked, or uneven concrete isn’t just an eyesore—it’s a safety risk. These issues can arise from poor soil compaction, freeze-thaw cycles, erosion, or tree roots. Residents of Burien trust us to repair their concrete slabs, sidewalks, patios, and driveways efficiently and effectively.
TerraFirma provides quick, reliable, and durable concrete leveling and repair solutions for Burien, WA, using cutting-edge polyurethane foam injection and expert crack sealing.
PolyLevel® Concrete Lifting
PolyLevel uses expanding polyurethane foam to lift and stabilize concrete slabs right here in Burien, WA. This non-invasive approach is perfect for:
- Sidewalks – Eliminates tripping hazards and restores smooth walkways.
- Driveways – Prevents further cracking and improves curb appeal.
- Patios, Porches, and Pool Decks – Ensures proper drainage and surface stability.
NexusPro™ Crack & Joint Sealant
To prevent water intrusion that can lead to further sinking, we apply NexusPro, a UV-resistant silicone-based joint sealant that:
- Cures in just 60 minutes.
- Withstands extreme weather and heavy use.
- Includes color-matched sand for a clean, polished look.
SealantPro™ Concrete Protection
After sealing and lifting your concrete, SealantPro provides a long-term barrier against moisture, chemicals, and seasonal temperature changes. It penetrates deep into concrete to resist stains, flaking, and surface erosion.
We also provide commercial concrete repair in Burien, WA for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Burien, WA
Burien, like much of the Pacific Northwest, is located in an active seismic zone. Homes constructed before the updated building codes of the 1990s may be particularly at risk. Even a small earthquake can lead to a house shifting off its foundation or suffering significant structural damage.
TerraFirma’s earthquake retrofitting services help secure your Burien home to its foundation and strengthen its ability to withstand seismic events.
Earthquake retrofitting in Burien not only strengthens your home, but it can also help lower your insurance premiums and deductibles, while qualifying you for coverage that may not have been available before the upgrade.
How We Retrofit
Assessment & Planning
In Burien, WA, the retrofitting process starts with a thorough assessment of your building’s current condition. Our skilled professionals, including structural engineers and trained technicians, will inspect your home to pinpoint any weaknesses and suggest the most effective solutions.
Our thorough evaluation covers everything from the foundation and walls to the roof and overall structure. After that, our engineer will create a detailed retrofitting plan tailored to the specific needs identified during the assessment.
Foundation Bolting
Next, we’ll secure the foundation to ensure your home in Burien is ready for anything. Our technicians install anchor bolts that connect your house to its foundation, providing stability and preventing any shifting during earthquakes.
Our process involves drilling into the foundation and installing sturdy steel bolts. Our team then tightens these bolts to strengthen the structure, improving its stability and ability to withstand seismic activity.
Adding Shear Walls
Shear walls play a vital role in earthquake retrofitting by helping to distribute seismic forces and keeping buildings in Burien safe from collapse.
Shear walls are often made from sturdy materials like plywood and are strategically installed throughout homes in Burien, especially in areas known as cripple walls. They enhance the support and stability of your walls, helping to minimize the risk of damage during an earthquake.
Bracing & Reinforcing
Next, we strengthen key areas of your Burien home with durable steel braces and straps. Our team expertly installs these reinforcements on essential structural elements like the roof, walls, and floors. This crucial step enhances your home’s stability, ensuring it has a robust framework that can withstand seismic forces.
Securing Applicances
Ensuring your appliances are securely anchored can greatly enhance the safety of your home in Burien, WA. It’s vital to anchor items like water heaters and refrigerators. Our technicians also offer installation of protective measures for gas meters, helping to reduce the risk of gas leaks.
Reparing Foundations
During retrofitting, technicians may notice substantial foundation damage that needs immediate repair. Adding crawl space support posts and foundation piers, and stabilizing the walls are some of the ways TerraFirma can reinforce your foundation.

Secure Your Burien Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Burien and across the Pacific Northwest protect their homes from the ground up. From foundation repair and basement waterproofing to crawl space encapsulation, concrete leveling, and earthquake retrofitting, our team delivers top-tier craftsmanship with trusted products, proven systems, and lasting warranties.
Every home in Burien, WA is unique, and TerraFirma is here to tackle any challenge you may face. Reach out to us today for a free in-home estimate and find out how we can help enhance your home’s safety, health, and value for the long haul.
Burien
Homeowners Frequently Asked Questions
How does rain put my home at risk ?
SeaTac soils are impacted by heavy rains causing hydrostatic pressure. This leads to cracks in foundations and basements and may cause your foundation to settle or sink. Engineered support structures and comprehensive drainage systems are key to keeping your home dry, safe, and stable.
What’s the best way to repair concrete?
The NexusPro solution is a commercial grade joint sealant that 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.
What types of cracks in my foundation or basement should I be concerned with?
Houses are susceptible to cracks in basements due to heavy rains and wet soils. Watch out for horizontal or stair step cracking along the foundation wall, diagonal cracks in the corners, crumbling walls and inward bulges.
How to fix a leaking basement floor?
If 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.
Are you noticing damp drywall and carpet in your basement?
Musty smells, walls that feel damp to the touch, and ground-level leaks are all indicators that your basement may need to be waterproofed. Don’t wait until the next heavy rain to protect your home from water damage.
Which vapor barrier is best for weeping walls?
The VaporLoc Elite Wall System is better for weeping walls than other commonly used vapor barriers. The VLE system has double sealed seams, waterproof material (not water-resistant), and is much thicker than vapor barriers available at retail stores.
Can I turn my crawl space into storage?
TerraFirma offers comprehensive encapsulation solutions to keep your crawl space clean, dry, and secure from outside threats. Our industry-leading vapor barrier system keeps out destructive moisture while greatly improving your indoor air quality. In most homes, TerraFirma can even encapsulate your crawl space, giving you a clean, dry area suitable for storage.
How to repair damaged concrete?
While you could seal concrete with urethane caulk found at your local big-box DIY store, that is a solution that is prone to cracking, bubbling and drying out over time. The local experts at TerraFirma are here to help with long lasting solutions to level seal your unprotected joints and cracked concrete.
What is that bad smell coming up from my drain?
Unwanted air and gasses are coming up through your home’s drain system. A great fix is our TrenchLock™ drain insert that can be installed in an existing trench drain to allow water down without allowing air to come up. The system comes with balls that fit over the drainage holes, which create an airtight seal when there is no water.
What is the difference between helical piers and push piers?
Helical piers and push piers are both types of foundation repair methods, but they 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. Helical piers are often preferred in areas with weak or unstable soil conditions.
How long does basement waterproofing last?
TerraFirma-installed waterproofing systems are expected to last decades with regular care & maintenance. We also warranty our installations, our WaterGuard and DryTrak drainage systems come with a transferrable lifetime warranty. Terms apply, view the details here. We stand by our work and the quality of the systems we install.