Foundation, Crawlspace & Concrete Contractors in Yamhill, OR
Terrafirma in Yamhill, OR
At TerraFirma, we’re dedicated to safeguarding and improving the structural integrity of homes right here in Yamhill and throughout Oregon and Washington. For years, we’ve been proud to serve local homeowners, helping them tackle the unique climate and soil challenges that our region presents.
No matter if you’re dealing with a cracked foundation, a musty basement, a damp crawl space, or an uneven concrete slab, TerraFirma has the experience, tools, and reliable systems to restore your Yamhill home and ensure it stays safe for years to come.
Yamhill’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 Yamhill
Foundation issues can lead to significant damage to your home if not taken care of. Signs like floor cracks, bowing walls, and sagging floors often indicate more serious structural problems. Homeowners in Yamhill, OR may experience sticking doors, windows that refuse to close properly, or visible gaps between walls and ceilings. These could all be indications that your foundation is shifting due to soil movement, water damage, or age-related wear and tear.
At TerraFirma, we specialize in foundation repair right here in Yamhill, offering expert solutions designed for the unique causes of your foundation issues. We start with a thorough inspection to determine the extent and source of the problem, and then we recommend one or more of our trusted foundation repair methods.
Foundation piers
In Yamhill, our push and helical piers are designed to stabilize and elevate 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 perfect for settings where soil stability is uncertain. Both options are minimally invasive and provide long-lasting solutions.
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, ongoing maintenance options, and transferable warranties, ensuring you feel confident and at ease in your Yamhill home.
Basement Waterproofing Yamhill
Dealing with a wet basement in Yamhill, OR? It can lead to mold, mildew, structural issues, and even poor air quality in your home. You might notice musty odors, stained walls, puddles of water, or efflorescence—a white, powdery residue that forms when water evaporates. Remember, even a tiny crack in your basement wall can turn into a significant entry point for moisture.
TerraFirma provides top-notch basement waterproofing solutions in Yamhill, ensuring your space stays dry, healthy, and functional, whatever the weather brings.
Crawl Space Repair Yamhill
Don’t underestimate your crawl space! In Yamhill, OR, it’s an essential part of your home’s structure and air quality. If neglected, it can become a breeding ground for mold, pests, and standing water, leading to wood rot, unpleasant odors, and even respiratory problems for your family. Take care of your crawl space to ensure a healthier home!
We understand the crawl space conditions in Yamhill, OR, and at TerraFirma, our repair services are tailored to tackle moisture, mold, pests, and sagging floors with comprehensive 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 Yamhill 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 Yamhill
Damaged, cracked, or uneven concrete can be more than just an eyesore—it poses a safety risk as well. Issues like poor soil compaction, freeze-thaw cycles, erosion, or tree root growth can lead to these problems. Here in Yamhill, homeowners trust us to promptly and effectively repair their concrete slabs, sidewalks, patios, and driveways.
TerraFirma provides quick, efficient, and durable concrete leveling and repair solutions for Yamhill, OR, using state-of-the-art polyurethane foam injection and expert crack sealing.
PolyLevel® Concrete Lifting
PolyLevel utilizes expanding polyurethane foam to lift and stabilize concrete slabs. This non-invasive method is perfect for the residents of Yamhill, OR who are 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 Yamhill, OR for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Yamhill, OR
Yamhill, like much of the Pacific Northwest, is located in an active seismic zone. Homes built prior to the updated building codes introduced in the 1990s may be particularly at risk. Even a small earthquake can cause a home to shift off its foundation or sustain significant structural damage.
TerraFirma’s earthquake retrofitting services help secure your Yamhill home to its foundation and strengthen its ability to withstand seismic events.
Updating your home with earthquake retrofitting in Yamhill can help lower your insurance premiums and deductibles, and even make you eligible for coverage that wasn’t available before the upgrade.
How We Retrofit
Assessment & Planning
In Yamhill, OR, the retrofitting process kicks off with a thorough evaluation of your building’s current condition. A qualified professional, like a structural engineer or a skilled technician, will assess your home, pinpoint any weaknesses, and suggest the best solutions to enhance its safety and efficiency.
This assessment involves a thorough inspection of the foundation, walls, roof, and overall structure. Following this, the engineer will create a detailed retrofitting plan tailored to the findings.
Foundation Bolting
Securing the foundation is a crucial next step for homes in Yamhill, OR. Our technicians install anchor bolts to firmly connect your house to its foundation, helping to prevent any lateral movement during an earthquake.
Our process includes drilling into the foundation and installing sturdy steel bolts. Our team then tightens these bolts to reinforce the structure, boosting 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, ensuring your Yamhill home stays safe and sound.
Shear walls, usually made from plywood or other sturdy materials, are installed in key spots around your home, especially in areas like cripple walls. They enhance the support and stability of your walls, helping to minimize the risk of damage during an earthquake.
Bracing & Reinforcing
In Yamhill, the next step involves strengthening key areas of your home with steel braces and straps. Our team installs these critical reinforcements on essential structural components like the roof, walls, and floors. This crucial enhancement boosts your home’s stability, ensuring it has a sturdy framework capable of withstanding seismic forces.
Securing Applicances
By securing your appliances, you can create a safer living environment in Yamhill. It’s important to anchor 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 Yamhill Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Yamhill 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 Yamhill, OR is unique—but TerraFirma has the perfect solution for every challenge. Reach out to us today for a free in-home estimate, and find out how we can help make your home safer, healthier, and more valuable for years to come.
Yamhill
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.