Foundation, Crawlspace & Concrete Contractors in Lake Forest Park, WA
Terrafirma in Lake Forest Park, WA
At TerraFirma, we focus on safeguarding and enhancing the structural integrity of homes throughout Oregon and Washington. For years, we’ve proudly served homeowners in Lake Forest Park, helping them tackle the unique climate and soil challenges in our area.
From a cracking foundation to a musty basement, a damp crawl space, or an uneven concrete slab, TerraFirma has the expertise, tools, and reliable solutions to restore your Lake Forest Park home and ensure it stays safe for years to come.
Lake Forest Park’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 Lake Forest Park
Foundation issues can lead to significant damage to your home if not taken care of. Signs like cracks in the floors, bowing walls, and sagging floors often indicate deeper structural concerns. Residents of Lake Forest Park, WA may find that their doors are sticking, windows are difficult to close, or there are noticeable gaps between walls and ceilings. These could all be indications that your foundation is shifting due to soil movement, water damage, or natural aging.
At TerraFirma, we specialize in foundation repairs in Lake Forest Park, offering targeted solutions designed to address the specific issues affecting your home’s foundation. Our process starts with a thorough inspection to identify the root cause and extent of the problem. After that, we recommend our reliable foundation repair systems tailored to your needs:
Foundation piers
Our push and helical piers are designed to stabilize and lift your foundation by transferring its weight to deeper, more stable soil. Helical piers work best in areas with known soil conditions, while push piers are great for locations with uncertain soil stability. Both systems are minimally invasive and provide permanent solutions for your home in Lake Forest Park.
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 professional installation, ongoing maintenance options, and transferable warranties, ensuring you feel confident and at ease in your Lake Forest Park home.
Basement Waterproofing Lake Forest Park
“Living in Lake Forest Park, WA, a wet basement could set the stage for mold, mildew, structural damage, and compromised air quality in your home. You might notice signs of water intrusion like musty odors, stained walls, pooling water, or a white, powdery substance known as efflorescence left behind after water evaporates. Even a tiny crack in your basement wall can become a significant entry point for moisture.”
TerraFirma provides top-notch basement waterproofing solutions in Lake Forest Park, ensuring your space stays dry, healthy, and functional—come rain or shine.
Crawl Space Repair Lake Forest Park
Crawl spaces are often forgotten, but they play a vital role in your home’s structure and air quality here in Lake Forest Park. If left unattended, a neglected crawl space can become a breeding ground for mold, pests, and standing water. These issues can result in wood rot, unpleasant odors, and even respiratory problems for those living in the home.
We understand the unique crawl space challenges in Lake Forest Park, WA. That’s why TerraFirma offers tailored crawl space repair services to tackle moisture, mold, pests, and sagging floors with effective solutions like full encapsulation, drainage, and 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 Lake Forest Park 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 Lake Forest Park
Damaged, cracked, or uneven concrete can detract from your home’s beauty and pose safety risks. These issues often arise from poor soil compaction, freeze-thaw cycles, erosion, or tree root growth. Homeowners in Lake Forest Park trust us to quickly and effectively repair their concrete slabs, sidewalks, patios, and driveways.
At TerraFirma, we provide quick, efficient, and durable concrete leveling and repair solutions right here in Lake Forest Park, WA, through our cutting-edge polyurethane foam injection and crack sealing techniques.
PolyLevel® Concrete Lifting
PolyLevel employs expanding polyurethane foam to lift and stabilize concrete slabs, making it an ideal, non-invasive solution for the residents of Lake Forest Park, WA:
- 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 Lake Forest Park, WA for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Lake Forest Park, WA
Lake Forest Park, WA, is situated in a region known for its seismic activity. Homes constructed before the 1990s, when updated building codes were introduced, are particularly at risk. Even a small earthquake can lead to a home shifting off its foundation or sustaining serious structural damage.
TerraFirma’s earthquake retrofitting services help secure your Lake Forest Park home to its foundation and strengthen its ability to withstand seismic events.
Earthquake retrofitting in Lake Forest Park not only enhances your home’s safety but can also help lower your insurance premiums and deductibles, and may even qualify you for coverage options that weren’t available before the upgrade.
How We Retrofit
Assessment & Planning
In Lake Forest Park, WA, the retrofitting process starts with a comprehensive assessment of your home’s current condition. A skilled professional, like a structural engineer or certified technician, will thoroughly inspect your property to pinpoint any weaknesses and suggest effective solutions.
This evaluation involves inspecting the foundation, walls, roof, and overall structure. Following this, our engineer creates a detailed retrofitting plan tailored to the findings.
Foundation Bolting
To ensure your home is safe and stable, the next step involves securing the foundation. Our technicians will install anchor bolts that connect your house to its foundation, helping to prevent any shifting during an earthquake.
This process includes drilling into the foundation to place steel bolts, which are then tightened to reinforce the structure, improving its stability and resistance to earthquakes.
Adding Shear Walls
Shear walls play a vital role in earthquake retrofitting in Lake Forest Park, WA, helping to distribute seismic forces and keep your home secure during a quake.
Shear walls are often made from plywood or other durable materials, and are strategically placed throughout homes, especially in cripple walls. These installations enhance the support and stability of your walls, helping to minimize the risk of damage during an earthquake in Lake Forest Park.
Bracing & Reinforcing
Next, we’ll enhance the critical areas of your Lake Forest Park home by installing steel braces and straps. Our team secures these to essential structural components like the roof, walls, and floors. This vital step boosts your home’s stability, creating a robust framework designed to withstand seismic forces.
Securing Applicances
Securing your appliances is key to creating a safer home in Lake Forest Park. Anchoring items like water heaters and refrigerators is crucial for safety. Our technicians can also install protective measures for your gas meters to help minimize 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 Lake Forest Park Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Lake Forest Park 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 Lake Forest Park, WA, is unique, but TerraFirma has the right solution for every challenge. 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 overall value for years to come.
Lake Forest Park
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.