Foundation, Crawlspace & Concrete Contractors in Roy, WA
Terrafirma in Roy, WA
At TerraFirma, we’re proud to serve the vibrant community of Roy, WA, by protecting and enhancing the structural integrity of homes. For years, we’ve been helping homeowners navigate the unique climate and soil challenges of our region with expert repair services.
From a solid foundation and a dry basement to a secure crawl space and a level concrete slab, TerraFirma has the expertise, tools, and reliable solutions to restore your home in Roy and keep it safe for years to come.
Roy’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 Roy
Foundation issues can lead to significant damage to your home if not addressed promptly. In Roy, WA, you might find signs like floor cracks, bowing walls, and sagging floors, which often indicate deeper structural problems. Homeowners may also notice sticking doors, windows that don’t close quite right, or gaps between the walls and ceilings. These issues can all point to shifting foundations caused by soil movement, water damage, or the natural aging process of your home.
At TerraFirma, we specialize in foundation repairs right here in Roy, offering targeted solutions designed to address the specific issues affecting your home. Our process starts with a thorough inspection to identify the extent and source of the problem. After that, we recommend one or more of our trusted foundation repair systems tailored to your needs:
Foundation piers
In Roy, WA, our push and helical piers are designed to stabilize and lift your foundation by transferring its weight to deeper, more reliable soil. Helical piers work best in areas with known soil conditions, while push piers are perfect for locations where soil stability may be uncertain. Both systems are minimally invasive and provide long-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, so you can feel confident and relaxed in your Roy home.
Basement Waterproofing Roy
Dealing with a wet basement in Roy, WA? It can lead to serious issues like mold, mildew, structural damage, and poor air quality in your home. You might notice musty odors, stained walls, standing water, or a white powdery residue called efflorescence that forms when water evaporates. Even a tiny crack in your basement wall can become a gateway for moisture to enter, so it’s important to address any issues early on!
TerraFirma provides state-of-the-art basement waterproofing solutions in Roy, ensuring your home stays dry, healthy, and functional—regardless of the weather.
Crawl Space Repair Roy
Crawl spaces may often be forgotten, but they play a vital role in the structure and air quality of your home in Roy, WA. If left unaddressed, a neglected crawl space can become a breeding ground for mold, pests, and standing water. These issues can lead to wood rot, unpleasant odors, and even respiratory problems for your family.
At TerraFirma, we understand the unique crawl space conditions in Roy, WA. Our expert crawl space repair services tackle moisture, mold, pests, and sagging floors with comprehensive solutions like full encapsulation, effective drainage, 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 Roy 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 Roy
Damaged, cracked, or uneven concrete isn’t just an eyesore—it’s a safety concern. These issues can arise from factors like poor soil compaction, freeze-thaw cycles, erosion, or tree root growth. Residents of Roy turn to us for prompt and effective solutions to repair their concrete slabs, sidewalks, patios, and driveways.
At TerraFirma, we provide fast, clean, and durable concrete leveling and repair solutions for Roy, 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. This gentle, non-invasive method is perfect for the needs of Roy, WA residents, including:
- 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 Roy, WA for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Roy, WA
Roy, WA, is located in an active seismic zone, making it crucial for homeowners to be aware of their property’s safety. Homes built before the updated building codes of the 1990s may be especially at risk. Even a small earthquake can cause significant issues, like shifting off foundations or experiencing serious structural damage.
TerraFirma’s earthquake retrofitting services help secure your Roy home to its foundation and strengthen its ability to withstand seismic events.
Earthquake retrofitting in Roy not only strengthens your home but can also help lower your insurance premiums and deductibles, making you eligible for coverage options you may not have had before.
How We Retrofit
Assessment & Planning
In Roy, WA, the retrofitting process starts with a thorough assessment of your building’s current condition. A qualified expert, like a structural engineer or a trained technician, will inspect your home to pinpoint any weaknesses and suggest the best solutions.
Our evaluation covers the foundation, walls, roof, and overall structure of your home here in Roy, WA. After our thorough assessment, our engineer will create a detailed retrofitting plan tailored to your specific needs.
Foundation Bolting
In Roy, WA, the next crucial step is securing your home’s foundation. Our technicians carefully install anchor bolts to tie the house to its foundation, keeping it stable and safe from lateral movement during an earthquake.
In this process, we drill into the foundation and insert sturdy steel bolts. Our team then tightens these bolts to reinforce the structure, improving its stability and helping it withstand seismic activity.
Adding Shear Walls
In Roy, WA, shear walls play a vital role in earthquake retrofitting by helping to distribute seismic forces, ensuring your home remains standing strong during an earthquake.
Shear walls are usually made from sturdy materials like plywood, and are installed in key areas of your home, especially in cripple walls. They give your walls extra support and stability, helping to minimize the risk of damage during an earthquake.
Bracing & Reinforcing
Next, we focus on strengthening essential parts of your home in Roy with durable steel braces and straps. Our team installs these reinforcements on key structural elements like the roof, walls, and floors. This crucial step enhances your home’s overall stability, creating a robust framework that can better withstand seismic forces.
Securing Applicances
Securing your appliances is key to creating a safer home in Roy, WA. It’s important to anchor essential items like water heaters and refrigerators. Our technicians also provide protection 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 Roy Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Roy 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 Roy, WA has its unique features—and at TerraFirma, we have solutions for every challenge you might face. Reach out to us today for a free in-home estimate, and see how we can help make your home safer, healthier, and more valuable for years to come!
Roy
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.