Basement Waterproofing & Crawl Space Repair Contractors in Greater Seattle

Dry out your home with our proven services in Seattle & nearby 

Do you have pools of water, damp spots, or musty odors in your basement or crawl space? No matter how big or small the problem might seem to you, if there is the slightest bit of moisture present in either of these below-the-home spaces, the issues will quickly grow out of hand. Only a professional basement waterproofing company can save you from the mold and mayhem to come.

TerraFirma Foundation Systems has over a decade of experience providing superior crawl space repair and basement waterproofing services throughout Greater Seattle. Our skilled technicians will inspect your home, helping you determine if a sump pump, dehumidifier, French drain, crawl space vapor barrier, or any of our other products is the way to go. We will guide you throughout the entire process, showing you and your property the respect they deserve.

If you're ready to live in the dry, comfortable home you deserve and make use of a clean, healthy basement, schedule a free estimate with TerraFirma Foundation Systems today! We serve customers in Seattle, Tacoma, Olympia and areas nearby.

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Our Basement & Crawl Space Services

Wet basement repair

We have the most effective solution for wet leaky basements.

Crawl space moisture control and structural repair in Greater Seattle

We improve the health and energy efficiency of your home by insulating the crawl space.

Patented sump pumps for the basement and crawl space in Greater Seattle

Keep your basement dry all the time with a sump pump system and backup system you can always count on!

SaniDry™ Basement Dehumidifier

Gain control of mold and allergens from entering your home by eliminating humidity.

Sagging Crawl Space Repair

We permanently stabilize sinking crawl spaces with our warrantied crawl space jack posts.

Crawl Space Insulation

Insulating & sealing the crawl space will improve home comfort and indoor air quality.


Patented, proven basement waterproofing solutions

As part of the Basement Systems dealer nationwide network, TerraFirma Foundation Systems has exclusive access to the highest quality and most effective products and solutions for basement waterproofing. We can customize a drainage system for your basement’s specific needs, depending on your foundation type and your home’s unique condition.

Our different sump pump systems can handle heavy water evacuation, and many feature battery backups, alarms, and extra pumps, reducing the chance of a basement flood to statistical insignificance. We have the products and experience to guarantee your basement is waterproof.

Crawl space encapsulation, insulation, and support systems

With our patented solutions for crawl space encapsulation, we can repair moisture intrusion issues, mitigate mold or mildew growth, and prevent structural damage caused by wood rot. If you’re suffering from a sagging crawl space, we have support systems manufactured for that exact purpose at a great value and cost.

We also provide insulation specifically designed for the crawl space. A properly encapsulated and insulated crawl space will bolster the energy efficiency of the home while also promoting healthy indoor air quality. Another additional benefit is that the floors above the crawl space will be much warmer after installing insulation.

Get started on a safer, drier home

If basement or crawl space problems are left unattended, they will only get worse over time, decreasing the health and value of your home. There's no reason to suffer these consequences when an experienced contractor is right around the corner! TerraFirma Foundation Systems has earned the trust of Greater Seattle homeowners by our attentive customer service and exceptional workmanship, and we know we'll get your project done efficiently and effectively.

Ready to get started? Call us at 1-253-777-0712 or contact us online to schedule a free estimate! We offer our basement waterproofing and crawl space repair service in Tacoma, Seattle, Olympia, Bellevue, Kent, Puyallup, Renton, Auburn, Redmond, Federal Way, and throughout the surrounding areas!

Serving WA including the Greater Seattle area
Cities in Adams County, WA
Benge
Lind
Othello
Ritzville
Washtucna

Cities in Asotin County, WA
Anatone
Asotin
Clarkston

Cities in Benton County, WA
Benton City
Kennewick
Prosser
Richland
West Richland

Cities in Chelan County, WA
Cashmere
Chelan
Entiat
Leavenworth
Malaga
Manson
Peshastin
Stehekin
Wenatchee

Cities in Columbia County, WA
Dayton

Cities in Cowlitz County, WA
Castle Rock
Cougar
Ryderwood
Silverlake
Toutle

Cities in Douglas County, WA
Bridgeport
East Wenatchee
Mansfield
Orondo
Palisades
Rock Island
Waterville

Cities in Ferry County, WA
Boyds
Curlew
Danville
Inchelium
Keller
Malo
Orient
Republic

Cities in Franklin County, WA
Connell
Eltopia
Mesa
Pasco

Cities in Garfield County, WA
Pomeroy

Cities in Grant County, WA
Beverly
Coulee City
Electric City
Ephrata
Grand Coulee
Hartline
Marlin
Mattawa
Moses Lake
Quincy
Royal City
Soap Lake
Warden

Cities in King County, WA
Auburn
Baring
Bellevue
Black Diamond
Bothell
Carnation
Duvall
Enumclaw
Fall City
Federal Way
Issaquah
Kenmore
Kent
Kirkland
Maple Valley
Medina
Mercer Island
North Bend
Pacific
Ravensdale
Redmond
Renton
Sammamish
Seattle
Skykomish
Snoqualmie
Vashon
Woodinville

Cities in Kittitas County, WA
Cle Elum
Ellensburg
Kittitas
Ronald
Roslyn
Thorp

Cities in Klickitat County, WA
Appleton
Bickleton
Glenwood
Goldendale
Roosevelt
Trout Lake

Cities in Lewis County, WA
Curtis
Ethel
Glenoma
Mineral
Morton
Mossyrock
Packwood
Pe Ell
Randle
Salkum
Toledo
Vader
Winlock

Cities in Lincoln County, WA
Almira
Creston
Davenport
Edwall
Harrington
Lamona
Lincoln
Mohler
Odessa
Reardan
Sprague
Wilbur

Cities in Okanogan County, WA
Brewster
Carlton
Coulee Dam
Loomis
Mazama
Methow
Okanogan
Omak
Oroville
Pateros
Riverside
Tonasket
Twisp
Wauconda
Winthrop

Cities in Pacific County, WA
Naselle

Cities in Pend Oreille County, WA
Cusick
Ione

Cities in Pierce County, WA
Anderson Island
Ashford
Bonney Lake
Buckley
Camp Murray
Carbonado
Dupont
Eatonville
Elbe
Fox Island
Gig Harbor
Graham
Lakebay
Lakewood
Longbranch
Mcchord Afb
Milton
Orting
Puyallup
Roy
Spanaway
Steilacoom
Sumner
Tacoma
University Place

Cities in Skamania County, WA
Stevenson

Cities in Stevens County, WA
Addy
Chewelah
Colville
Evans
Ford
Fruitland
Gifford
Hunters
Kettle Falls
Marcus
Northport
Rice
Springdale
Valley
Wellpinit

Cities in Thurston County, WA
Lacey
Olympia
Yelm

Cities in Wahkiakum County, WA
Cathlamet
Grays River
Rosburg
Skamokawa

Cities in Walla Walla County, WA
Burbank
College Place
Prescott
Touchet
Waitsburg
Walla Walla

Cities in Whitman County, WA
Colfax
Colton
Endicott
Farmington
Garfield
Hay
Lacrosse
Lamont
Oakesdale
Palouse
Pullman
Rosalia
Saint John
Thornton
Uniontown

Cities in Yakima County, WA
Cowiche
Grandview
Granger
Harrah
Mabton
Moxee
Naches
Outlook
Selah
Sunnyside
Tieton
Toppenish
Wapato
White Swan
Yakima
Zillah

Our Locations:

TerraFirma Foundation Systems
761 NE Garden Valley Blvd.
Roseburg, OR 97470
1-253-533-2399


TerraFirma Foundation Systems
10029 S Tacoma Way #D
Tacoma, WA 98499
1-253-533-2399