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Foundation, Crawlspace & Concrete Contractors in Issaquah, WA
Terrafirma in Issaquah, WA
At TerraFirma, we’re dedicated to safeguarding and enhancing the structural integrity of homes throughout Washington, including right here in Issaquah. For years, we’ve helped homeowners tackle the unique climate and soil challenges of our region with expert repair services.
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 Issaquah home and ensure its safety for years to come.
Issaquah’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 Issaquah
Foundation issues can lead to significant damage to your home if not taken care of. Common signs like cracks in the floor, bowing walls, and sagging floors may indicate more serious structural problems. In Issaquah, WA, homeowners might also experience sticking doors, windows that won’t close properly, or visible gaps between walls and ceilings. These issues can be signs that your foundation is shifting due to soil movement, water damage, or simply the effects of aging.
At TerraFirma, we specialize in foundation repair right here in Issaquah. Our expert team provides tailored solutions designed to address the root causes of your foundation issues. We start with a thorough inspection to identify the problem’s source and severity, then recommend one or more of our proven foundation repair systems to get your home back on solid ground.
Foundation piers
Our push and helical piers are expertly designed to stabilize and lift your foundation by shifting its load to deeper, more stable soil. Helical piers work best in areas with known soil conditions, while push piers are perfect for spots where soil stability is uncertain. Both systems are minimally invasive and provide lasting solutions for your home in Issaquah.
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, flexible maintenance options, and transferable warranties, providing you with confidence and peace of mind in your Issaquah home.
Basement Waterproofing Issaquah
Dealing with a wet basement in Issaquah can result in mold, mildew, structural issues, and decreased air quality in your home. Signs of water intrusion might include 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 open the door to significant moisture problems.
TerraFirma provides cutting-edge basement waterproofing solutions in Issaquah, ensuring your space stays dry, healthy, and functional all year round, no matter the weather.
Crawl Space Repair Issaquah
Crawl spaces in Issaquah may not always be top of mind, but they play an essential role in your home’s structure and air quality. When neglected, these spaces can become a breeding ground for mold, pests, and standing water. This can lead to serious issues like wood rot, unpleasant odors, and even health problems for those living in the home.
At TerraFirma, we understand the unique crawl space challenges in Issaquah, WA. Our crawl space repair services are specifically tailored to tackle moisture, mold, pests, and sagging floors, offering solutions like full encapsulation, effective drainage, and robust 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 Issaquah 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 Issaquah
Damaged, cracked, or uneven concrete isn’t just an eyesore—it can also pose safety risks. Issues like poor soil compaction, freeze-thaw cycles, erosion, and tree root growth can lead to these problems. Homeowners in Issaquah trust us to swiftly and effectively repair their concrete slabs, sidewalks, patios, and driveways.
TerraFirma provides quick, efficient, and durable concrete leveling and repair solutions in Issaquah, WA, utilizing cutting-edge polyurethane foam injection and expert crack sealing.
PolyLevel® Concrete Lifting
PolyLevel utilizes expanding polyurethane foam to lift and stabilize concrete slabs in Issaquah, WA. This non-invasive method is perfect for:
- 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 Issaquah, WA for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Issaquah, WA
Issaquah is located in a region of the Pacific Northwest that is known for its seismic activity. Homes constructed before the updated building codes of the 1990s can be particularly at risk. Even a small earthquake has the potential to shift a house off its foundation or cause significant structural damage.
TerraFirma’s earthquake retrofitting services help secure your Issaquah home to its foundation and strengthen its ability to withstand seismic events.
Retrofitting your home for earthquakes in Issaquah not only enhances safety but can also lower your insurance premiums and deductibles, plus help you qualify for coverage that was previously unavailable.
How We Retrofit
Assessment & Planning
In Issaquah, the retrofitting process starts with a thorough assessment of your building’s current condition. An expert—like a structural engineer or trained technician—will inspect your home to pinpoint any weaknesses and suggest the best solutions.
This assessment covers a close look at the foundation, walls, roof, and overall structure of your home. Based on the findings, our engineer will create a detailed retrofitting plan tailored to your needs.
Foundation Bolting
Securing the foundation is the next important step in ensuring your home’s safety. Our skilled technicians install anchor bolts to firmly connect your house to its foundation, helping to prevent any lateral movement during an earthquake here in Issaquah.
Our process includes drilling into the foundation and adding steel bolts. Our team then tightens these bolts to strengthen the structure, improving its stability and making it more resistant to seismic activity here in Issaquah.
Adding Shear Walls
Shear walls play a vital role in earthquake retrofitting here in Issaquah, WA, as they help distribute seismic forces and keep our buildings safe from collapsing.
In Issaquah, shear walls are essential for ensuring your home’s safety. Made from sturdy plywood or other durable materials, these walls are strategically placed, especially in areas like cripple walls. They enhance the strength and stability of your home, helping to minimize the risk of damage during an earthquake.
Bracing & Reinforcing
Next, we focus on strengthening crucial areas of your home in Issaquah with durable steel braces and straps. Our team expertly installs these reinforcements to key structural elements like the roof, walls, and floors. This essential step enhances your home’s overall stability, ensuring it has a solid framework capable of withstanding seismic forces.
Securing Applicances
By securing your appliances, you can create a safer living environment for everyone in your home in Issaquah, WA. It’s essential 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 Issaquah Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Issaquah 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 Issaquah, WA has its unique character—but TerraFirma is here to address every challenge. Reach out to us today for a complimentary in-home estimate and see how we can enhance the safety, health, and value of your home for years to come.
Issaquah
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.
