Foundation, Crawlspace & Concrete Contractors in Selma, OR
Terrafirma in Selma, OR
At TerraFirma, we focus on strengthening and preserving the structural integrity of homes throughout Oregon and Washington. For years, we’ve been proud to serve homeowners in Selma, helping them tackle the specific climate and soil challenges of our region.
From a cracked foundation and musty basements to damp crawl spaces and uneven concrete slabs, TerraFirma has the expertise, tools, and reliable systems to restore your Selma home and ensure it stays safe for years to come.
Selma’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 Selma
Foundation problems 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 issues. Homeowners in Selma, OR, may experience sticking doors, windows that won’t close properly, or noticeable gaps between walls and ceilings. These issues can all point to a shifting foundation caused by soil movement, water damage, or simply the effects of aging.
At TerraFirma, we specialize in foundation repair in Selma, offering expert solutions designed specifically for the unique challenges your home faces. Our process starts with a thorough inspection to pinpoint the source and extent of the problem. After that, we’ll recommend one or more of our trusted foundation repair systems tailored to your needs.
Foundation piers
In Selma, OR, our push and helical piers are expertly designed to stabilize and lift your foundation by redirecting its weight to deeper, more stable soil. Helical piers work great for areas with known soil conditions, while push piers are ideal for locations where soil stability is uncertain. Both methods 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, ongoing maintenance options, and transferable warranties, ensuring you feel confident and at ease in your Selma home.
Basement Waterproofing Selma
Dealing with a wet basement in Selma, OR? It can lead to mold, mildew, structural issues, and poor air quality in your home. Look out for signs like musty odors, stained walls, standing water, or efflorescence—a white, powdery residue that appears when water evaporates. Remember, even a tiny crack in your basement wall can turn into a big problem by letting moisture in.
TerraFirma provides top-notch basement waterproofing solutions in Selma, ensuring your space stays dry, healthy, and functional in any weather.
Crawl Space Repair Selma
Your crawl space might not be top of mind, but it plays a vital role in your home’s structure and air quality here in Selma. If neglected, it can become a breeding ground for mold, pests, and standing water. These issues can lead to wood rot, unpleasant smells, and even health problems for you and your family. Take care of your crawl space – it’s essential for a healthy home!
We understand the unique crawl space conditions in Selma, OR, and TerraFirma’s repair services are tailored to tackle moisture, mold, pests, and sagging floors. Our solutions include full encapsulation, drainage, and structural support to keep your space safe and healthy.

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 Selma 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 Selma
Damaged, cracked, or uneven concrete can be more than just an eyesore; it poses safety risks too. These issues often arise from factors like poor soil compaction, freeze-thaw cycles, erosion, or tree root growth. That’s why homeowners in Selma trust us to quickly and effectively repair their concrete slabs, sidewalks, patios, and driveways.
TerraFirma provides quick, efficient, and durable concrete leveling and repair solutions for Selma, OR, using innovative 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 folks in Selma, 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 Selma, OR for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Selma, OR
Selma, OR, is located in a seismically active region of the Pacific Northwest. Homes built 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 sustaining significant structural damage.
TerraFirma’s earthquake retrofitting services help secure your Selma home to its foundation and strengthen its ability to withstand seismic events.
Retrofitting your home for earthquake resilience in Selma can help lower your insurance premiums and deductibles, and may even make you eligible for coverage options that weren’t available before the upgrade.
How We Retrofit
Assessment & Planning
In Selma, 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.
This assessment involves a thorough inspection of the foundation, walls, roof, and overall structure. After that, our engineer creates a detailed retrofitting plan tailored to the results.
Foundation Bolting
The next step in this process is securing the foundation. Our technicians will install anchor bolts to firmly connect your home to its foundation, ensuring it stays in place and reducing the risk of movement during an earthquake.
In Selma, our process involves drilling into the foundation and placing sturdy steel bolts. Our team tightens these bolts to reinforce the structure, boosting its stability and making it more resilient against seismic activity.
Adding Shear Walls
Shear walls play a vital role in earthquake retrofitting in Selma, OR, helping to distribute seismic forces and keeping buildings safe from collapse.
Shear walls are usually made from plywood or other durable materials, carefully installed in key areas of your home, especially within cripple walls. These walls offer extra support and stability, helping to lower the risk of damage during an earthquake.
Bracing & Reinforcing
Next, we’ll enhance the critical areas of your Selma home by using sturdy steel braces and straps. Our skilled team installs these to essential structural elements like the roof, walls, and floors. This important step boosts your home’s stability, creating a resilient framework capable of withstanding seismic forces.
Securing Applicances
Securing your appliances can make your home safer for everyone. It’s important to anchor items like water heaters and refrigerators. Our technicians can also install safeguards 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 Selma Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Selma 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 Selma, OR is unique, and TerraFirma has the perfect solution for any challenge you may face. 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.
Selma
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.