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Foundation, Crawlspace & Concrete Contractors in Cornelius, OR
Terrafirma in Cornelius, OR
At TerraFirma, we’re dedicated to safeguarding and improving the structural integrity of homes in Cornelius and throughout Oregon and Washington. For years, we’ve been proud to assist local homeowners in navigating the unique climate and soil challenges of our region.
From a cracking foundation to a musty basement, damp crawl spaces, or uneven concrete slabs, TerraFirma has the expertise and trusted solutions to restore your Cornelius home and ensure it stays safe for years to come.
Cornelius’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 Cornelius
Foundation issues can lead to significant damage to your home if not addressed promptly. In Cornelius, OR, homeowners may notice troubling signs like cracks in the floor, bowing walls, or sagging floors that indicate deeper structural problems. You might experience sticking doors, windows that won’t close properly, or gaps appearing between your walls and ceilings. These issues could all point to shifting foundations caused by soil movement, water damage, or simply the wear and tear of age.
In Cornelius, TerraFirma specializes in foundation repairs with tailored solutions designed to address the specific causes of your foundation issues. We start with a thorough inspection to determine the extent and source of the problem, allowing us to recommend one or more of our effective foundation repair systems:
Foundation piers
Our push and helical piers are designed to stabilize and lift your foundation in Cornelius by transferring its load to deeper, more stable soil. Helical piers work best in areas with known soil conditions, while push piers are the right choice for regions with uncertain soil stability. 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 professional installation, ongoing maintenance options, and transferable warranties, ensuring you have confidence and peace of mind in your Cornelius home.
Basement Waterproofing Cornelius
Dealing with a wet basement in Cornelius can lead to mold, mildew, structural issues, and poor air quality in your home. Look out for musty odors, stained walls, pooling water, or efflorescence—a white, powdery residue that appears when water evaporates. Even a tiny crack in your basement wall can become a significant gateway for moisture.
TerraFirma provides top-notch basement waterproofing solutions in Cornelius to ensure your space stays dry, healthy, and functional—regardless of the weather.
Crawl Space Repair Cornelius
Crawl spaces in Cornelius are often forgotten, but they play a vital role in your home’s structure and air quality. 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 conditions in Cornelius, OR, and at TerraFirma, our repair services are tailored to tackle issues like moisture, mold, pests, and sagging floors. We offer complete encapsulation, effective drainage solutions, and robust structural support to keep your home 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 Cornelius 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 Cornelius
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. That’s why homeowners in Cornelius turn to us for fast and effective solutions to restore their concrete slabs, sidewalks, patios, and driveways.
TerraFirma provides quick, tidy, and durable concrete leveling and repair services right here in Cornelius, OR, using cutting-edge polyurethane foam injection and crack sealing techniques.
PolyLevel® Concrete Lifting
PolyLevel uses expanding polyurethane foam to lift and stabilize concrete slabs. This non-invasive method is perfect for Cornelius, OR residents who need:
- 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 Cornelius, OR for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Cornelius, OR
Living in Cornelius, OR means being aware that much of the Pacific Northwest is located in an active seismic zone. Homes constructed before the updated building codes of the 1990s may be particularly at risk. Even a small earthquake can shift a home off its foundation or result in significant structural damage.
TerraFirma’s earthquake retrofitting services help secure your Cornelius home to its foundation and strengthen its ability to withstand seismic events.
Enhancing your home with earthquake retrofitting in Cornelius can help lower your insurance premiums and deductibles, plus it may qualify you for coverage options that weren’t available before the upgrade.
How We Retrofit
Assessment & Planning
In Cornelius, OR, the retrofitting journey starts with a thorough assessment of your building’s current condition. Our team, including skilled structural engineers and trained technicians, will inspect your home to pinpoint any weaknesses and suggest the best solutions to enhance its resilience.
This assessment covers the foundation, walls, roof, and overall structure. Afterward, our engineer will create a detailed retrofitting plan tailored to the results.
Foundation Bolting
Next up in our process for homes in Cornelius, OR, is securing the foundation. Our technicians will install anchor bolts to firmly connect your house to its foundation, ensuring it stays put during an earthquake.
In Cornelius, our process begins by drilling into the foundation and placing sturdy steel bolts. Our team then tightens the bolts, reinforcing the structure and improving its stability against seismic activity.
Adding Shear Walls
Shear walls play a vital role in earthquake retrofitting in Cornelius, OR, helping to distribute seismic forces and keep buildings safe from collapsing.
Shear walls, made from sturdy materials like plywood, are strategically placed throughout homes in Cornelius, especially in areas like cripple walls. These walls offer extra support and stability, helping to reduce the risk of damage during an earthquake.
Bracing & Reinforcing
Next, we strengthen vital areas of your home in Cornelius with durable steel braces and straps. Our team carefully installs these reinforcements to essential structural elements like the roof, walls, and floors. This not only boosts your home’s overall stability but ensures it has a robust framework capable of withstanding seismic forces.
Securing Applicances
By securing your appliances, you can create a safer living environment for everyone in Cornelius, OR. It’s essential to anchor items like water heaters and refrigerators. 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 Cornelius Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Cornelius 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 Cornelius, OR is unique—but TerraFirma has a 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.
Cornelius
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.
