Foundation, Crawlspace & Concrete Contractors in Forest Grove, OR
Terrafirma in Forest Grove, OR
At TerraFirma, we focus on safeguarding and improving the structural health of homes in Forest Grove and throughout Oregon and Washington. For years, we’ve proudly served homeowners in Forest Grove, helping them tackle the unique climate and soil challenges of our beautiful region.
From a cracked foundation and a musty basement to a damp crawl space or an uneven concrete slab, TerraFirma has the knowledge, tools, and reliable solutions to restore your Forest Grove home and ensure its safety for years to come.
Forest Grove’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 Forest Grove
Foundation issues can lead to significant damage if not taken care of. If you’re in Forest Grove, OR, you might notice signs like cracks in your floors, bowing walls, or sagging floors. Additionally, stuck doors, windows that won’t close right, or gaps between your walls and ceilings may indicate deeper structural problems. These symptoms could mean your foundation is shifting due to factors like soil movement, water damage, or simply the wear and tear of time.
At TerraFirma, we provide expert foundation repair services right here in Forest Grove. Our approach is all about addressing the specific issues affecting your foundation. We start with a thorough inspection to pinpoint the extent and cause of the problem. Based on our findings, we then recommend one or more of our reliable foundation repair solutions:
Foundation piers
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 ideal for locations where soil stability is uncertain. Both options are minimally invasive and provide lasting solutions for your foundation needs in Forest Grove.
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 have confidence and peace of mind in your Forest Grove home.
Basement Waterproofing Forest Grove
Dealing with a wet basement in Forest Grove? It can lead to mold, mildew, structural damage, and poor air quality in your home. You might notice musty odors, stained walls, pooling 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 Forest Grove, ensuring your space stays dry, healthy, and functional regardless of the weather conditions.
Crawl Space Repair Forest Grove
Crawl spaces are often forgotten, but they play a vital role in the structure and air quality of your home here in Forest Grove, OR. 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 smells, and even respiratory problems for those living in your home.
We understand the unique crawl space conditions in Forest Grove, OR, and TerraFirma’s crawl space repair services are tailored to combat moisture, mold, pests, and sagging floors. We provide comprehensive solutions including full encapsulation, drainage systems, 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 Forest Grove 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 Forest Grove
Damaged, cracked, or uneven concrete isn’t just an eyesore—it’s a safety concern. These issues often arise from poor soil compaction, freeze-thaw cycles, erosion, or the growth of tree roots. Homeowners in Forest Grove 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 right here in Forest Grove, OR, utilizing innovative polyurethane foam injection and expert crack sealing.
PolyLevel® Concrete Lifting
PolyLevel utilizes expanding polyurethane foam to lift and stabilize concrete slabs, making this non-invasive solution perfect for residents of Forest Grove, OR.
- 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 Forest Grove, OR for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Forest Grove, OR
Forest Grove, like much of the Pacific Northwest, is situated in an active seismic zone. Homes built before the updated codes of the 1990s may be particularly at risk. Even a minor earthquake can lead to homes shifting off their foundations or experiencing significant structural damage.
TerraFirma’s earthquake retrofitting services help secure your Forest Grove home to its foundation and strengthen its ability to withstand seismic events.
Upgrading your home with earthquake retrofitting in Forest Grove not only helps protect your property but can also lower your insurance premiums and deductibles, plus make you eligible for coverage options that weren’t available before.
How We Retrofit
Assessment & Planning
In Forest Grove, OR, the retrofitting journey starts with a thorough assessment of your building’s current state. A qualified expert, like a structural engineer or trained technician, will inspect your home to pinpoint any weaknesses and suggest the best solutions tailored to your needs.
This assessment looks closely at the foundation, walls, roof, and overall structure of your home. From there, our engineer creates a detailed retrofitting plan tailored to the findings.
Foundation Bolting
Securing the foundation is the next step in this process. Our technicians install anchor bolts to firmly connect your home to its foundation, helping to prevent side-to-side movement during an earthquake.
Our process includes drilling into the foundation and inserting steel bolts, which our team tightens to reinforce the structure. This improves stability and helps it better withstand seismic forces, ensuring your home in Forest Grove is safe and secure.
Adding Shear Walls
Shear walls play a vital role in earthquake retrofitting by helping to distribute seismic forces and keeping buildings in Forest Grove, OR safe from collapse.
Shear walls are usually made of plywood or other durable materials, and our skilled workers install them in key areas of your home, especially in the cripple walls. These additions offer extra support and stability, helping to minimize the risk of damage during an earthquake right here in Forest Grove.
Bracing & Reinforcing
Next, we strengthen key areas of your home in Forest Grove with steel braces and straps. Our team carefully installs these to essential structural elements like the roof, walls, and floors. This vital step enhances your home’s overall stability, ensuring it has a sturdy framework that can withstand seismic forces.
Securing Applicances
Securing your appliances is key to creating a safer home in Forest Grove, OR. By anchoring essential items like water heaters and refrigerators, you can enhance safety for everyone in your home. Our technicians will also install safety measures for gas meters to 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 Forest Grove Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Forest Grove 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 Forest Grove, OR is unique—but at TerraFirma, we have the right solutions for every challenge you face. Reach out to us today for a free in-home estimate and find out how we can make your home safer, healthier, and more valuable for years to come.
Forest Grove
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.