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Products & Services

Basement Waterproofing
Waterproof Wall Products
DryTrak Basement Water Control System
Floodring Water Heater Protection
Basement Dehumidifier
Sump Pump Solutions
Triplesafe Sump Pump
SuperSump Sump Pump
UltraSump Sump Pump
Interior Drainage Systems
Waterguard® Drainage System Drytrak®
Trench Drain WaterGuard®: Iron Ochre System (IOS)
Flowguard Drain
Well duct Window Well Drain
Warrantied Products & Solutions

Foundation Repair
Pier Systems
Push Piers
Slab Piers
Helical Piers
Smart Jack Crawl Space Support Posts
Foundation Wall Repair
Geo-Lock Wall Anchors
Powerbrace Basement Wall Repair System
CarbonArmor Reinforcing Basement Wall System
Bowing Foundation Wall Repair
Concrete Lifting

Concrete Repair
Concrete Driveway Repair
Concrete Pool Deck Repair
Concrete Walkway Repair
Concrete Patio Repair
Concrete Leveling & Lifting
Mudjacking Alternatives
NexusPro Cracked Concrete Repair

Earthquake Retrofitting

Air Purifier

Free Estimates & Inspections

TerraFirma serving King, WA

Structural repair, crawl space repair, basement waterproofing, & more

Have wet basement walls, a cracked foundation, crawl space humidity, sinking concrete slabs, or other issues with your King County, WA home? TerraFirma provides expert foundation repair, crawl space repair, concrete repair, and basement waterproofing solutions that restore the home's performance and image, and value overall.

We specialize in customizable solutions adaptable for all King County, WA homes! Call 1-866-486-7196 or click below to schedule a free, no-obligation service estimate today!

Foundation repair solutions in King County, WA

Even the smallest of structural issues can worsen to cause damage to the rest of your King County, WA home. TerraFirma has reliable Supportworks products and solutions that not only restore your foundation but prevent ongoing damage in the future.

Our foundation repair services include:

  • Pier systems
  • Structural repair services
  • Foundation wall repair systems
  • Concrete repair
  • And more!

Have you noticed structural settlement? Cracks within the foundation? A tilted Chimney? We have solutions for these issues and more!

Call or email us today to schedule a free consultation with a system design specialist, who will provide an initial foundation assessment and walk you through the entire repair process.

Restore & encapsulate your crawl space

Interested in crawl space solutions that fix water build-up, humidity, mold growth, and structural issues and provide added storage space and protection? The crawl space repair system from TerraFirma is the solution! Not only does TerraFirma restore your King County, WA crawl space, they also seal the below-grade space to protect it from the elements and for added storage space!

Our crawl space repair & encapsulation services include:

  • Crawl space sump pumps
  • Crawl space vapor barriers
  • Crawl space access wells
  • Downspout extensions
  • And more!

Wet basement repair products & solutions

A wet basement can cause serious issues with the overall structure of your King County, WA home. We specialize in basement waterproofing solutions that repair damaged below-grade spaces and provide added water protection.

Our basement waterproofing services include:

  • Waterproof wall products
  • Water heater protection
  • Basement dehumidifier
  • Basement sump pump
  • Interior drainage solutions
  • Window well drains
  • Downspout extensions
  • And more!

Interested in patented Basement Systems products and services that do more than provide temporary fixes? Our warrantied solutions are just what you need for long-term solutions!

Concrete repair contractors

Sinking, cracked, and weak concrete looks as unappealing as dangerous, as they are a serious falling hazard. TerraFirma isn't interested in providing services that will make your King County, WA home messy and end up costing you more. That is why we offer our polyurethane concrete solution, NexusPro, cracked concrete repair. This innovative concrete repair solution applies quickly to produce durable, long-lasting results without the mess and stress.

Our concrete repair services include:

  • Concrete leveling
  • NexusPro cracked concrete repair
  • Concrete sidewalk repair
  • Concrete driveway repair
  • Concrete pool deck repair
  • Concrete patio repair
  • Mudjacking alternatives
  • And more!

Wet basement, crawl space, foundation repairs & more

Since 2005, TerraFirma has offered reliable foundation repair, crawl space repair, basement waterproofing, concrete repair, earthquake retrofitting services that restore King County, WA homes and provide lasting protection.

Call 1-866-486-7196 or click below to schedule a FREE, no-pressure service estimate for any of our services in King County, WA!

Job Stories From King County, WA
Pooling Water in Bellevue, WA

Barry W. had a problem with his front walkway in Bellevue, WA, as it was pooling water right before the concrete steps due to settlement. He was worried that this could lead to a slipping risk or the water flowing into his foundation, so he contacted TerraFirma for help. 

Tulane Seville, the Sales Manager, met with Barry and assessed the property. He found that not only was the walkway settled, but the front steps had also cracked and settled. To fix this issue, Tulane recommended TerraFirma's Concrete Leveling Solutions, which involved using polyurethane foam and Nexus Pro. He then passed on this information to Robert Marciniak and his crew to come up with a plan. 

The TerraFirma crew quickly got to work and within a day, they had repaired and stabilized Barry's walkway and front steps. As a result, the pool of water and the potential slipping hazard were eliminated.

Water Seeping into Crawl Space in Federal Way, WA

Karrie B. was facing a problem in her home in Federal Way, WA, where water was seeping into her crawl space from the backside under the foundation. She was concerned about the damage it could cause to her house and decided to seek help from TerraFirma.

Eric Durand, the System Design Specialist, visited Karrie's property to assess the damage. He found out that water was seeping in from under the footing of the home, and there were a few cracks on the foundation due to water damage over the years. The back patio had also settled and cracked due to water. Eric suggested installing the TripleSafe Sump Pump and drain tile to waterproof the crawl space, along with a SmartJack on one of the support beams to reduce pressure on the foundation wall. Eric collaborated with Angel Encinas and his team to develop a plan.

Angel Encinas' crew installed the SmartJack, TripleSafe Sump Pump, and drain tile in Karrie's crawl space in just one day to secure it and keep it dry for years to come.


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