TerraFirma
Foundation Repair in Tacoma, WA

Built for Tacoma homes facing Puget Sound moisture, hillside soils, wet winters, and long-term foundation movement.

WHAT CAUSES FOUNDATION PROBLEMS IN TACOMA HOMES?

South Puget Sound conditions shape Tacoma homes: heavy winter rainfall, pockets of clay-rich soil, sloped lots, older crawl spaces, and persistent groundwater near low-lying areas. As soil becomes saturated through long wet seasons and then dries during warmer months, foundations can settle, bow, or shift over time.

Common foundation issues throughout Tacoma include:

  • Cracked walls and uneven floors
  • Basement moisture, seepage, and wall movement
  • Crawl space humidity, settlement, and sagging supports
  • Soil movement caused by heavy Puget Sound rainfall
  • Aging foundations in older Pierce County homes

Since 2005, TerraFirma has helped homeowners throughout Tacoma diagnose and repair foundation problems caused by Pacific Northwest soil, groundwater, and weather conditions.

Foundation Repair Signs of Issues small foundation repair

Schedule a free evaluation

For the soonest available appointments, give us a call!

Why do Tacoma Homes develop foundation problems?

Foundation concerns in Tacoma are closely tied to Puget Sound rainfall, hillside grading, mixed clay and fill soils, and the age of many neighborhood homes.

Across Tacoma, saturated soils, older drainage systems, and sloped properties can place steady pressure on foundations, basement walls, and crawl space supports. When soils expand during wet months and tighten during drier periods, that movement can create settlement and structural stress.

In addition, many older homes in Tacoma neighborhoods were built before current drainage, seismic, and crawl space standards, making them more vulnerable to movement over time.

Tacoma’s Soil &
Geology

Many foundation issues in Tacoma can be traced to South Puget Sound soil behavior, groundwater, older grading, and hillside drainage conditions.


Typical causes of such problems are:

  • Soil composition with clay, glacial till, and fill soils that can shift with moisture
  • Difficult drainage on sloped lots in North Tacoma, South Tacoma, and hillside areas
  • Perched groundwater, compacted fill, and poorly draining soil layers
  • Saturated soil due to Tacoma’s long wet season and Puget Sound moisture
  • Constant hydrostatic pressure against foundations and basement walls

This can lead to foundation settlement, cracking, or basement wall movement in Tacoma homes.

Tacoma’s Rainfall & Water Pressure

Tacoma’s moisture-heavy climate can put continual stress on foundations for much of the year.

Some of the elements that cause foundation issues include:

  • Frequent rainfall and extended damp periods from fall through spring
  • Sustained Puget Sound moisture and stormwater runoff
  • Wet soil pushing against foundations via hydrostatic pressure
  • Dry-season soil contraction after months of saturation
  • Continual expansion and contraction under the foundation of the home

Over time, these moisture cycles can contribute to structural movement in homes throughout Pierce County.

Tacoma’s Housing Stock

Older properties across Tacoma are often susceptible to structural and foundation concerns, especially in neighborhoods with aging crawl spaces, basements, and drainage systems.

The following problems are frequently encountered within aging properties in Pierce County:

  • Foundations with inadequate depths based on current standards
  • Decayed crawl space support structures and wooden structures
  • Poor drainage systems
  • Insufficient moisture-proof protection
  • Susceptibility to settling and movement

As a result of such defects, it is common to see problems like sagging floors and cracked walls develop within the aging property.

Tacoma’s Seismic Context

Homes in Tacoma and Western Washington face seismic risk from the Cascadia Subduction Zone and regional fault activity.

Potential vulnerabilities include the following:

  • Decaying building foundations and framing systems
  • Foundation settlement or shifting
  • Un-reinforced crawlspaces
  • Old homes constructed before modern earthquake building codes
  • Cracked walls or structural movement

While foundation repair is not the same as earthquake retrofitting, ensuring that an old structure remains stable through foundation repair work can go a long way toward improving its performance during an earthquake.

  TF foundation repair icon s foundation repair
Foundation
Reinforcement
TF Foundation Anchor icon s foundation repair
Foundation
Anchor
tf expert icon6 foundation repair
Wall Stabilization/
Restoration
Issue
TF Vapor Barrier icon s foundation repair
Vapor Barrier
Cracks in Basement Floor tf expert check foundation repair tf expert check foundation repair    
Lifting and Stabilizing Foundation tf expert check foundation repair tf expert check foundation repair tf expert check foundation repair  
Reinforce Cracking or Bowing Walls tf expert check foundation repair tf expert check foundation repair tf expert check foundation repair  
Stabilize minor wall racks or bowing under 2″        
Straighten leaning walls tf expert check foundation repair tf expert check foundation repair tf expert check foundation repair  
Restore structure to crumbling walls tf expert check foundation repair      
Seal leaking walls tf expert check foundation repair     tf expert check foundation repair
Wet or stained walls       tf expert check foundation repair
Efflorescence       tf expert check foundation repair

Common Signs of Foundation Problems in Tacoma Homes

FN RES FR Sagging Floor 04 1024x683 1 foundation repair
When the soil beneath a building’s foundation compresses or shifts unequally, it causes parts of the foundation to sink or settle more than others. This uneven settling commonly results in noticeable sloping or uneven floors.
Foundation Settlement
cracked wall in basement foundation small foundation repair
Common symptoms of this problem include horizontal or stair step cracking along the foundation wall, diagonal cracks in the corners, crumbling walls and inward bulges.
Look for spalling cracks or delamination which can impact structural integrity.
Cracks in Foundation and Basement Walls
window door stuck jammed small foundation repair
If your windows and/or doors are sticking, jamming, or your doors have non-functioning locks, you could have a foundation problem. Other common signs include door openings that aren’t square and diagonal cracks at top corners of window and door openings.
Jammed Windows and Sticking Doors
tilting chimney small foundation repair
A leaning or tilting chimney, generally accompanied by cracks where the chimney foundation meets the home foundation. Damage to the roof where flashing meets the chimney, or gaps between the chimney and home walls that have been filled in with mortar, foam, or caulk.
Tilting Chimneys
cracked sidewalk uneven small foundation repair
Driveways in our region can often become cracked and sunken. Issues with the soil underneath those concrete driveway slabs are usually accompanied by concrete sidewalk cracks and raised sidewalks.
Cracked and Uneven Sidewalks & Driveways
efflorescence small foundation repair
Water stains on concrete walls are caused by mineral deposits from the water drying on the concrete. Efflorescence stains appear as a white or grayish ash on the wall.
Keep an eye on basement walls getting yellow, orange or black stains as these are all symptoms related to moisture getting in.
These are also signs that soil or hydrostatic pressure outside the foundation walls could lead to foundation failure.
Stained Basement Walls + Efflorescence
FN RES FR Sagging Floor 04 1024x683 1 foundation repair
Foundation Settlement

In case the soil under the foundation gets compressed or moves in an unequal manner, it leads to differential settling or sinking of different areas of the foundation. Differential settlement often causes sloping of floors.

cracked wall in basement foundation small foundation repair
Cracks in Foundation and Basement Walls

The common indicators of this issue include horizontal or stepped cracking of the foundation wall, diagonal cracking at the corners of the walls, and deterioration of the walls with bulging.

One should also consider checking for spalling and delamination.

window door stuck jammed small foundation repair
Jammed Windows and Sticking Doors

The following symptoms might point to problems with the foundation:

  • Sticking and jamming doors or windows;
  • Non-functioning locks on doors;
  • Door openings not being square;
  • Diagonal cracking in corners above windows and door openings.
tilting chimney small foundation repair
Tilting Chimneys

Tilted chimneys with cracks at the point of contact with the house’s foundation. Damage to the roof where there is contact between the chimney and roof, or any gaps between the chimney structure and the house walls which may have been sealed using mortar, foam, or caulking materials.

cracked sidewalk uneven small foundation repair
Cracked and Uneven Sidewalks & Driveways

Cracking and sinking are common problems with driveways in our area. Soil problems under concrete driveway slabs typically go hand in hand with concrete walkway cracking and raised walkways.

efflorescence small foundation repair
Stained Basement Walls + Efflorescence

The water stain marks left by water droplets on concrete walls happen due to mineral accumulation of water. The efflorescence stain is a gray or white substance on the walls.

Basement wall discoloration in shades of yellow, orange or black should be watched out for since they indicate moisture problems.

SEE WHAT YOUR NEIGHBORS
HAVE TO SAY ABOUT US!

At TerraFirma we take pride in our work! We are trusted and referred by homeowners since 2005, to provide solutions for home foundations, basement and crawl space moisture, concrete leveling, and earthquake retrofitting.

tf n logo foundation repair
facebook logo foundation repair
bbb Terrafirma Award 2 foundation repair
HA elite Terrafirma Awar Banner 2 foundation repair
yelp logo foundation repair
facebook logo foundation repair
tf n logo foundation repair
bbb Terrafirma Award 2 foundation repair
HA elite Terrafirma Awar Banner 2 foundation repair
yelp logo foundation repair
dehumidifiers titlesection 11 foundation repair

Foundation Repair Solutions for Tacoma homes

Foundation Piers

Helical piers are commonly used on Tacoma homes built on shifting clay, fill, or moisture-sensitive soils where traditional shallow foundations can no longer maintain stable support.

Wall Stabilization

Wall stabilization systems help protect Tacoma basements from inward wall movement caused by hydrostatic pressure during the Pacific Northwest rainy season.

Schedule a free evaluation

For the soonest available appointments, give us a call!

An owner of a split-level house built in 1991 in Lakewood, Washington requested assistance from TerraFirma due to settling front steps, which posed a risk of accidents and were unattractive.

TerraFirma found that a nearby downspout was allowing water to run alongside the concrete slab causing soil washing out under the concrete steps leading to their settling.

PolyLevel® polyurethane foam was injected into the foundation to lift up and support the concrete steps. In addition, NexusPro® was used to seal the existing cracks.

Foundation Repair in Pierce County, WA

The homeowner in University Place, Pierce County, WA turned to TerraFirma for a crawl space inspection due to fears of water damage.

Upon inspection, our System Design Specialist identified a faulty support post which was floating almost five inches off the ground, thereby failing to provide adequate support to the floor system. The void left by the support post had been filled by debris that had moved over time.

TerraFirma proceeded to remove the damaged support post and install a SmartJack® support system made from durable galvanized steel which can handle loads exceeding 60,000 lbs.

SCHEDULE A FREE EVALUATION
IN TACOMA

Tacoma Dome District in Tacoma, Washington

TACOMA Homeowners Frequently Asked Questions

Do I Need a Permit for Foundation Repair in Tacoma?

Why Do Tacoma Basements Get Wet During Winter?

How Quickly Can TerraFirma Serve Tacoma Homes?

Does Clay Soil Affect Foundations in Tacoma?

Are Homes in South Hills More Prone to Settlement?

Commercial Foundation Services
to Minimize Downtime & Risk

Our commercial foundation repair solutions are built around the principles of minimal downtime, long-term performance, and efficient use of resources to accomplish the goal. Our services often save money on first-time costs and always save on long-term costs while maximizing property values.

A red crosshair icon

 Objective Engineering Solutions

A red outline of a droplet with a black highlight inside

Dedicated Partner Approach

A simple red house icon with a black roof and walls.

Choose from Multiple
Solution Options

Three construction workers wearing helmets and red safety vests.

Safe, Effective, Experienced
& Trained Crews

TERRAFIRMA INTACOMA

With 20 years of experience tackling foundation repairs and waterproofing across Washington, we’ve seen
just about everything. Dive into our blog for some great homeowner tips, insightful case studies, and
impressive before & after galleries showcasing our work.

Homeowners across Tacoma have relied on TerraFirma for their foundation leveling and stabilizing, including North End, Proctor, Stadium District, Hilltop, Central Tacoma, South Tacoma, and West End neighborhoods, as well as nearby Fircrest, University Place, Lakewood, Puyallup, and Gig Harbor.

TACOMA
Homeowner
REVIEWS

Don’t take our word for it – see what our clients have to say.
From Tacoma to Seattle, Portland, and across the Pacific Northwest, our Foundation Repair work speaks for itself

I had a great experience working with Samuel Bryant. Sam arrived on time and communicated clearly ahead of the inspection, coordinating well with both me and my tenant. He performed a thorough inspection of our basement sump pump, took the time to explain everything clearly, and provided detailed recommendations based on our specific situation. What stood out most was how responsive and patient he was with all of my questions. I really appreciated Sam’s excellent service, and I would highly recommend working with him.
They raised & leveled areas of my patio that had sunk due to poor soil prep by the builder (Shea Homes, which refused to accept responsibility for their poor construction). However, the salesman made all kinds of promises that were unrealistic and the patio looked worse than it did before the repair (small cracks became quite large and obvious, though filled with material). The crew worked hard and did their job well but it was impossible to fulfill the salesman's claims. To their credit, they tried hard to fix it but couldn't, and so refunded my down payment. Very honorable and professional (except the poorly trained salesman), so I have them 4 stars.
Excellent work, cleaned up the work site, made me a happy homeowner!
The Terra Firma people I dealt with were very professional. They listened to my needs and went the extra mile to assist me.
Inspector Elijah was on time when he said he was going to be there was very prompt and personable. I feel like did a very thorough inspection of my crawlspace.
Just a real pleasure to do business with. The System Design Specialist is very professional. And very thorough. Hailey Newman Is AAA+++ amazing! Everything explained in easy to understand terms. I really could not feel more confident about my issues and my options.
My pest inspector found a lot of water in my crawl space after a routine inspection. A plumber found no leaks and believed it to be ground water. TerraFirma responded to my needs promptly and ended up digging a ditch around the inside perimeter of my crawl space, inserted pipe and covered with river rock for drainage. A sump pump was installed inside to drain outside. They took such care with the drain they dug outside that when they were finished you could hardly tell where they had dug the ditch. They took such care to protect my home - especially since the crawl space access was inside my home. They protected my floors and walls very carefully and completely - even with having to bring in numerous wheelbarrows of rock. They also cleaned up both inside and outside my home so you couldn't tell anyone had worked all day to completed this large job. They did an amazing job!!! Thank you TerraFirma for your great work ethic and service.
Tulane Seville inspected my cracked foundation wall twice at my request. He scheduled convenient times and arrived promptly. He noted important issues with the wall that other contractors failed to notice or take seriously. TerraFima declined to bid after concluding they could not guarantee proper repairs due to the extent of the damage in my foundation wall. Though I have no experience with their repairs I can say that their professional integrity is first rate.
Excellent experience with TerraFirma. Noah Bryant arrived on time, sent a helpful reminder, and spent nearly 3 hours thoroughly inspecting inside and outside. He took photos, clearly explained crawl space issues, and offered honest recommendations with options—no pressure. Very professional and sincere. Highly recommend!
TerraFirma was great from start to finish. When we submitted a services request for the work we needed, several companies initially responded, but then once we spoke to them all but one disappeared. We met with Tulane from TerraFirma and he was kind and professional, answered all of our questions, and gave thorough answers - always ensuring we understood what he had just explained. After deciding to have TerraFirma do the work our project manager Bree was helpful and responsive and worked with us when we had to change dates a few times due to personal work conflicts. Then on day one we met with Kelly, one of TerraFirma's crew bosses. We walked through everything, he lined out what they would likely do each day, and off they went getting the job done. At the end of each, Kelly checked in with what had been done and what was planned for the next day. The crew were all respectful and polite. They finished on time and the work was great! Kelly walked through all the things they did and what we would need to do to keep up with maintenance and monitoring and when to call them for help. I even had some other contractors come in for other work after TerraFirma had finished and they complimented the work they had done. Can't say enough good things about Tulane, Bree, Kelly, and all the folks at TerraFirma. Thanks again!
Reasonable rate, young and skilled techs. It is almost like a magic to see the gaps dissapearing.
During my search on-line for a source of repair for cracks in our cement driveway, I found the TerraFirma Foundations Systems website most appealing. I invited Seth, Systems Design Specialist, to provide an estimate. He provided a thorough explanation of TerraFirma's method for repairing cracks. He examined the driveway, made the necessary measurements, and provided a reasonable estimate--considering the extent of the current damage. The project was scheduled to be accomplished in two phases. Phase 1 scheduled Nov 2024: foam injection to stabilize the cement pads thereby preventing further damage. Phase 2 scheduled May 2025 or sooner depending on the weather. This delay was a consequence of my procrastination to tackle the project earlier and TerraFirma's determination to ensure the repair would suffice to fulfill their 5-year warranty. Employees Robert and Elijah arrived on the scene as scheduled. While I observed their work, they impressed me with their professionalism and efficiency as an experienced team. They put forth an obvious desire to do an exceptional job thereby giving me confidence in the performance of the task and TerraFirma overall. Standby for my review this summer regarding Phase 2.

TerraFirma
Tacoma Office

10111 S Tacoma Way d4
Tacoma, WA 98499

Hours: Monday – Friday, 8am-5pm

Crawl Space Repair & Foundation Lifting For Tacoma & Seattle Homeowners

Foundation cracks? Support posts sagging? Walls bowing? With TerraFirma‘s team of experts we can fix it!

CRAWLSPACES & BASEMENTS – Crawlspaces are gross. Basements get wet. We’ll make sure they are stable, safe and dry.
FOUNDATIONS & RETAINING WALLS – We can stabilize, waterproof, level your foundation, or even retrofit it for earthquakes.
CONCRETE – It cracks, it sinks, and we can fix that. Whether it needs a patch or a lift we got you.

We want to make your home dry, stable, and safe. TerraFirma has waterproofed basements for over 20 years from Lake Oswego to Beaverton, and Hillsboro to Gresham. Backed by the best warranty in the business.

    View our privacy policy for more information

    Schedule your free
    Foundation Evaluation

    Schedule your free
    Foundation Evaluation