Foundation, Crawlspace & Concrete Contractors in Silver Lake, WA
Terrafirma in Silver Lake, WA
At TerraFirma, we’re dedicated to protecting and enhancing the structural integrity of homes in Silverlake, WA. For years, we’ve been helping local homeowners tackle the unique climate and soil challenges of our region with expert repair services.
From a cracked foundation and musty basement to a damp crawl space or an uneven concrete slab, TerraFirma has the expertise, tools, and reliable solutions to restore your Silverlake home and ensure its safety for years to come.
Silver Lake’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 Silver Lake
Neglecting foundation issues can lead to significant damage in your Silverlake home. If you’re spotting signs like cracks in the floor, bowing walls, or sagging floors, it’s essential to address these symptoms promptly. You may also notice doors that stick, windows that don’t close right, or gaps appearing between your walls and ceilings. These indicators often point to shifting foundations caused by soil movement, water damage, or simply the passage of time.
At TerraFirma, we specialize in foundation repairs right here in Silverlake. Our expert solutions address the specific issues causing your foundation distress. We start with a thorough inspection to identify the extent and root of the problem, and then we recommend one or more of our trusted foundation repair systems.
Foundation piers
Our push and helical piers are designed to stabilize and lift your foundation by transferring its weight to deeper, more stable soil. Helical piers work best in areas with known soil conditions, while push piers are the smart choice for locations with uncertain soil stability. Both methods are minimally invasive and provide permanent solutions for your foundation needs here in Silverlake.
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 Silverlake home.
Basement Waterproofing Silver Lake
Dealing with a wet basement in Silverlake, WA? It’s more than just an inconvenience—it can lead to mold, mildew, structural issues, and poor air quality in your home. Look out for signs like musty odors, stained walls, pooling water, or white, powdery spots known as efflorescence, which appear when water evaporates. Remember, even a tiny crack in your basement wall can turn into a big problem for moisture intrusion.
At TerraFirma, we provide top-notch basement waterproofing solutions in Silverlake that ensure your space stays dry, healthy, and functional all year round, no matter the weather.
Crawl Space Repair Silver Lake
Crawl spaces in Silverlake are often forgotten, yet they play a vital role in your home’s structure and air quality. If left unchecked, a neglected crawl space can become a breeding ground for mold, pests, and standing water. This can result in wood rot, unpleasant odors, and even respiratory problems for you and your family.
At TerraFirma, we understand the unique crawl space challenges in Silverlake, WA. Our specialized crawl space repair services tackle issues like moisture, mold, pests, and sagging floors with comprehensive solutions, including full encapsulation, effective drainage, and sturdy 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 Silver Lake 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 Silver Lake
Damaged, cracked, or uneven concrete not only looks bad—it can also pose a safety risk. These issues often arise from factors like inadequate soil compaction, freeze-thaw cycles, erosion, or tree roots. Residents of Silverlake trust us to swiftly and effectively repair their concrete slabs, sidewalks, patios, and driveways.
TerraFirma provides quick, reliable, and durable concrete leveling and repair services in Silverlake, WA, utilizing innovative polyurethane foam injection and crack sealing techniques.
PolyLevel® Concrete Lifting
PolyLevel uses expanding polyurethane foam to lift and stabilize concrete slabs. This non-invasive approach is perfect for the unique needs of Silverlake, WA:
- 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 Silver Lake, WA for industrial buildings, warehouse floors, roads, runways, and rail lines—using the same high-quality systems we trust for residential properties.
Earthquake Retrofitting Silver Lake, WA
Silverlake is nestled in a region of the Pacific Northwest that is prone to seismic activity. Homes constructed before the updated building codes of the 1990s may be particularly at risk. Just a minor earthquake can lead to your home shifting off its foundation or experiencing significant structural damage.
TerraFirma’s earthquake retrofitting services help secure your Silver Lake home to its foundation and strengthen its ability to withstand seismic events.
Getting your home earthquake retrofitted in Silverlake can not only enhance its safety but also help lower your insurance premiums and deductibles. Plus, you might even qualify for coverage options that were previously unavailable until after the upgrade.
How We Retrofit
Assessment & Planning
The retrofitting process starts with a thorough evaluation of your building’s current state. A qualified professional, like a structural engineer or trained technician, will inspect your home to pinpoint any weaknesses and suggest the best solutions tailored for Silverlake.
This assessment looks into the foundation, walls, roof, and overall structure. After that, our engineer creates a detailed retrofitting plan tailored to the results.
Foundation Bolting
Securing the foundation is the crucial next step for homeowners in Silverlake. Our technicians install anchor bolts that connect your house to its foundation, helping to prevent lateral movement during an earthquake.
In Silverlake, WA, we start by drilling holes into your foundation, where we insert strong steel bolts. Our team then tightens these bolts to reinforce your structure, boosting its stability and making it more resilient against seismic activity.
Adding Shear Walls
Shear walls play an essential role in earthquake retrofitting by helping to distribute seismic forces and keep buildings in Silverlake, WA, safe from collapse.
Shear walls, often made from plywood or other sturdy materials, are installed in key areas of homes, especially in cripple walls, to enhance support and stability. This added reinforcement helps reduce the risk of damage during an earthquake, ensuring your Silverlake home stays safer in the face of seismic activity.
Bracing & Reinforcing
Next, we enhance the critical areas of your home in Silverlake with sturdy steel braces and straps. Our team installs these reinforcements on vital structural components like the roof, walls, and floors. This process boosts your home’s overall stability, ensuring it has a resilient framework ready to handle seismic activity.
Securing Applicances
Securing your appliances is key to creating a safer home in Silverlake, WA. Anchoring essential items like water heaters and refrigerators is crucial. 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 Silver Lake Home Today
At TerraFirma, we’ve spent over 25 years helping homeowners in Silver Lake 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 Silverlake, WA has its own unique character—yet TerraFirma has the perfect solution for every challenge you face. Reach out to us today for a free in-home estimate and find out how we can help enhance your home’s safety, health, and value for years ahead.
Silver Lake
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.