Foundation, Crawlspace & Concrete Contractors in Nehalem, OR
Terrafirma in Nehalem, OR
At TerraFirma, we focus on safeguarding and strengthening the structural integrity of homes in Nehalem and beyond. For years, we’ve been proud to assist homeowners in this unique coastal community, addressing the specific climate and soil challenges that come with living in this beautiful region.
From a cracking foundation to a musty basement, a damp crawl space, or an uneven concrete slab, TerraFirma has the experience, tools, and reliable solutions to restore your Nehalem home and ensure its safety for years ahead.
Nehalem’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 Nehalem
Foundation issues can lead to significant damage to your home if not taken care of. If you’re in Nehalem, OR, keep an eye out for signs like floor cracks, bowing walls, and sagging floors, as these may indicate deeper structural problems. You might also notice doors that stick, windows that won’t close right, or gaps between your walls and ceilings. These issues can all be clues that your foundation is shifting due to soil movement, water damage, or simply the wear and tear of time.
At TerraFirma, we specialize in foundation repairs right here in Nehalem, offering expert solutions designed to address the specific cause of your foundation issues. Our process starts with a thorough inspection to evaluate the extent and source of the problem. From there, we suggest one or more of our reliable foundation repair systems:
Foundation piers
Our push and helical piers are designed to stabilize and lift your foundation by shifting its weight to deeper, more stable soil. Helical piers work great in areas with known soil conditions, while push piers are perfect for spots where soil stability is uncertain. Both options are minimally invasive and provide lasting solutions for your foundation needs in Nehalem.
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 Nehalem home.
Basement Waterproofing Nehalem
In Nehalem, a damp basement can create problems like mold, mildew, structural damage, and poor air quality in your home. You may notice signs of water intrusion such as musty odors, stained walls, pooling water, or efflorescence—a white, powdery residue left after water evaporates. Even a tiny crack in your basement wall can become a significant gateway for moisture.
TerraFirma provides state-of-the-art basement waterproofing solutions in Nehalem, ensuring your space stays dry, healthy, and functional, come rain or shine.
Crawl Space Repair Nehalem
Crawl spaces in Nehalem may be out of sight, but they play a vital role in your home’s structure and air quality. If not properly maintained, these areas can become a breeding ground for mold, pests, and stagnant water. Neglecting your crawl space can result in wood rot, unpleasant odors, and even health problems for your family.
We understand the unique crawl space challenges in Nehalem, OR. TerraFirma’s crawl space repair services are tailored to tackle moisture, mold, pests, and sagging floors with comprehensive solutions like 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 Nehalem 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 Nehalem
Damaged, cracked, or uneven concrete can be more than just an eyesore—it poses a safety risk too. These issues often arise from factors like poor soil compaction, freeze-thaw cycles, erosion, or tree roots. That’s why homeowners in Nehalem trust us to repair their concrete slabs, sidewalks, patios, and driveways promptly and efficiently.
TerraFirma provides quick, clean, and durable concrete leveling and repair services right here in Nehalem, OR, using cutting-edge polyurethane foam injection and expert crack sealing.
PolyLevel® Concrete Lifting
PolyLevel employs expanding polyurethane foam to lift and stabilize concrete slabs. This non-invasive method is perfect for residents of Nehalem, OR, looking to address:
- 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 Nehalem, OR for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Nehalem, OR
Nehalem, like much of the Pacific Northwest, is situated in an active seismic zone. Homes constructed before the 1990s, when updated building codes were put into place, are particularly at risk. Even a small earthquake can lead to significant issues, such as shifting off foundations or experiencing serious structural damage.
TerraFirma’s earthquake retrofitting services help secure your Nehalem home to its foundation and strengthen its ability to withstand seismic events.
Upgrading your home with earthquake retrofitting in Nehalem not only enhances safety but can also lower your insurance premiums and deductibles. Plus, you may qualify for coverage options that weren’t available before the upgrade.
How We Retrofit
Assessment & Planning
In Nehalem, OR, the retrofitting process starts with a thorough assessment of your building’s condition. A skilled expert, 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 the findings, our engineer will create a detailed retrofitting plan tailored to your needs.
Foundation Bolting
Bolstering the foundation is the next key step in the process. Our technicians carefully install anchor bolts to secure your home to its foundation, ensuring it stays in place during an earthquake.
In Nehalem, our process begins by drilling into the foundation and placing sturdy steel bolts. Our team then 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 Nehalem, OR, by helping to distribute seismic forces and keep buildings safe from collapse.
Shear walls, made from sturdy materials like plywood, are strategically installed throughout homes in Nehalem, especially in areas known as cripple walls. These walls offer extra support and stability, helping to safeguard your home against potential earthquake damage.
Bracing & Reinforcing
Next, we’ll enhance the critical areas of your home in Nehalem by adding steel braces and straps. Our team will carefully install these to essential structural elements like the roof, walls, and floors. This step significantly boosts your home’s stability, creating a sturdy framework that can better handle seismic forces.
Securing Applicances
By securing appliances, you’ll help create a safer living environment for everyone in Nehalem. It’s important to anchor items like water heaters and refrigerators. Our technicians also provide protection for gas meters to minimize 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 Nehalem Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Nehalem 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 Nehalem, OR is unique, but TerraFirma has a solution for every challenge. Reach out to us today for a free in-home estimate and learn how we can help make your home safer, healthier, and more valuable for years to come.
Nehalem
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.