Foundation, Crawlspace & Concrete Contractors in Shelton, WA
Terrafirma in Shelton, WA
At TerraFirma, we focus on safeguarding and improving the structural integrity of homes in Shelton, WA. With years of experience, we’ve helped countless homeowners in the area tackle the unique climate and soil challenges that come with living here.
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 Shelton home and ensure it stays safe for years to come.
Shelton’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 Shelton
Foundation problems can lead to significant damage to your home if not dealt with promptly. In Shelton, WA, homeowners may see signs like cracks in the floors, bowing walls, and sagging floors, all of which could indicate more serious structural issues. You might also notice doors that stick, windows that won’t shut properly, or gaps appearing between your walls and ceilings. These issues can signal shifts in your foundation caused by soil movement, water damage, or simply the wear and tear of age.
At TerraFirma, we specialize in foundation repair right here in Shelton. Our expert solutions are designed to address the specific issues affecting your foundation. We start with a thorough inspection to determine the cause and extent of the problem, then recommend one or more of our effective repair systems to restore your foundation’s strength.
Foundation piers
In Shelton, WA, our push and helical piers are expertly designed to stabilize and lift your foundation by transferring its weight to deeper, more stable soil. Helical piers work great in areas with known soil conditions, while push piers are ideal for locations where soil stability may be uncertain. Both options 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 professional installation, ongoing maintenance options, and transferable warranties, providing you with confidence and peace of mind for your home in Shelton.
Basement Waterproofing Shelton
Dealing with a wet basement in Shelton, WA? It can create serious issues like mold, mildew, and structural damage, not to mention poor air quality in your home. You might notice signs such as musty odors, stained walls, pooling water, or efflorescence—a white, powdery substance that appears when water evaporates. Even a small crack in your basement wall can turn into a significant pathway for moisture.
TerraFirma provides top-notch basement waterproofing solutions in Shelton, ensuring your space stays dry, healthy, and functional in any weather.
Crawl Space Repair Shelton
Crawl spaces in Shelton, WA, may be easy to forget, but they’re essential for your home’s structure and air quality. If left unmaintained, these areas can become a breeding ground for mold, pests, and standing water. This can result in wood rot, unpleasant odors, and even health problems for those living in the home.
We understand the unique crawl space conditions in Shelton, WA. That’s why TerraFirma offers tailored crawl space repair solutions to tackle moisture, mold, pests, and sagging floors with our comprehensive encapsulation, drainage, and structural support services.

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 Shelton 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 Shelton
Cracked, damaged, or uneven concrete isn’t just an eyesore—it can also pose a safety risk. These issues often arise from factors like poor soil compaction, freeze-thaw cycles, erosion, or tree roots. Homeowners in Shelton trust us to promptly and effectively repair their concrete slabs, sidewalks, patios, and driveways.
TerraFirma provides quick, reliable, and durable concrete leveling and repair services in Shelton, WA, using advanced polyurethane foam injection and professional crack sealing.
PolyLevel® Concrete Lifting
PolyLevel uses expanding polyurethane foam to lift and stabilize concrete slabs. This non-invasive solution is perfect for Shelton, WA, residents looking to:
- 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 Shelton, WA for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Shelton, WA
Shelton, WA, is located in a region known for its seismic activity. Homes built before the updated building codes of the 1990s may be particularly at risk. Even a minor earthquake can cause your home to shift off its foundation or suffer significant structural damage.
TerraFirma’s earthquake retrofitting services help secure your Shelton home to its foundation and strengthen its ability to withstand seismic events.
Earthquake retrofitting in Shelton not only enhances your home’s safety but can also lower your insurance premiums and deductibles, plus help you qualify for coverage that wasn’t available before the upgrade.
How We Retrofit
Assessment & Planning
In Shelton, WA, the retrofitting process starts with a thorough evaluation of your building’s current state. A qualified professional, like a structural engineer or trained technician, will inspect your home to pinpoint any weaknesses and suggest the best solutions.
This evaluation involves a thorough inspection of the foundation, walls, roof, and overall structure. Based on these findings, our engineer will create a detailed retrofitting plan tailored to your needs.
Foundation Bolting
In Shelton, securing your home’s foundation is essential. Our technicians install anchor bolts that connect your house to its foundation, ensuring stability and preventing movement during an earthquake.
In Shelton, WA, we strengthen foundations by drilling holes and installing sturdy steel bolts. Our team tightens these bolts to enhance your structure’s stability and improve its resistance to seismic activity.
Adding Shear Walls
In Shelton, WA, shear walls play an essential role in earthquake retrofitting, helping to distribute seismic forces and keep buildings from collapsing.
In Shelton, WA, shear walls, made from sturdy materials like plywood, are strategically placed in key areas of your home, especially within cripple walls. These walls enhance support and stability, helping to minimize the risk of damage during an earthquake.
Bracing & Reinforcing
Next, we’ll strengthen your home by installing steel braces and straps in key areas. Our team carefully applies these to essential structural components like the roof, walls, and floors. This step significantly boosts your home’s stability, giving it a resilient framework designed to withstand seismic forces right here in Shelton.
Securing Applicances
By securing appliances, you can create a safer living environment in Shelton, WA. Anchoring items like water heaters and refrigerators is crucial. Our technicians will also install protective measures for gas meters to help 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 Shelton Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Shelton 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 Shelton, WA has its own unique charm—and TerraFirma is here to tackle any challenge you face. Reach out to us today for a complimentary in-home estimate and learn how we can enhance the safety, health, and value of your home for years to come.
Shelton
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.