About TerraFirma

We cover all of Oregon and Southwest Washington.

Fix it once. Fix it with confidence. Fix it with TerraFirma

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Founded in 2005, TerraFirma has been a partner in keeping your home safe and sound structurally for over a decade. The foundation experts have gained a reputation of providing all customers with the best quality of service. Each employee is extensively trained and certified in foundation repair and basement waterproofing, so you can rest assured knowing you are in good hands.

At TerraFirma, we understand that foundation cracks, wet crawlspaces, and musty basements are stressful. We offer a free onsite estimate for all work that you may need to be completed, and we will work with you to customize a solution for your home.

TerraFirma stands by our promise of solving your foundation problem and basement needs in the most efficient manner.

How to reduce the allergens in your home

Wednesday, March 27th, 2019 by CJ Garcia

How to reduce the allergens in your home - Image 1

There’s nothing better than springtime in the Pacific Northwest. The blooming flowers, warm weather, and rays of sunshine make all of those months of rain worth it. 

However, with the beautiful weather come seasonal allergies that affect millions of people every year.

How TerraFirma’s crawl space encapsulation improves your home’s indoor air quality

Your home is supposed to be a refuge from your allergies, but if your crawl space isn’t sealed with a vapor barrier, the allergens under your home are more than likely making your allergies worse.

An encapsulated crawl space from TerraFirma isolates the wet, exposed dirt under your home by using a 120 mil thick liner. The liner serves as a vapor barrier that significantly reduces the chances of allergens such as mold and dust mites moving out of your crawl space and into your home.

The dehumidifier TerraFirma installs in crawl spaces reduces relative humidity to less than 60% and can extract several hundred gallons of moisture every day. Reducing moisture in the air helps remove condensation, which can produce mold, mildew, and other allergens.

Improving your home’s air quality is one of the best ways to reduce your seasonal sniffles this spring. If you feel like your crawl space might be the source of your poor indoor air quality, contact TerraFirma to schedule your free inspection!


our service area

We serve the following areas

  • Adams
  • Adrian
  • Arock
  • Athena
  • Baker City
  • Bates
  • Boardman
  • Bridgeport
  • Brogan
  • Burns
  • Canyon City
  • Cove
  • Crane
  • Dayville
  • Diamond
  • Drewsey
  • Durkee
  • Echo
  • Elgin
  • Enterprise
  • Fields
  • Frenchglen
  • Haines
  • Halfway
  • Harper
  • Helix
  • Heppner
  • Hereford
  • Hermiston
  • Hines
  • Huntington
  • Imbler
  • Imnaha
  • Ione
  • Ironside
  • Irrigon
  • Jamieson
  • John Day
  • Jordan Valley
  • Joseph
  • Juntura
  • Kimberly
  • La Grande
  • Lexington
  • Long Creek
  • Lostine
  • Meacham
  • Milton Freewater
  • Monument
  • Mount Vernon
  • North Powder
  • Nyssa
  • Ontario
  • Oxbow
  • Paulina
  • Pendleton
  • Pilot Rock
  • Prairie City
  • Princeton
  • Richland
  • Riley
  • Riverside
  • Seneca
  • Spray
  • Stanfield
  • Summerville
  • Sumpter
  • Ukiah
  • Umatilla
  • Union
  • Unity
  • Vale
  • Wallowa
  • Westfall
  • Weston
Our Locations:

TerraFirma Foundation Systems
761 NE Garden Valley Blvd.
Roseburg, OR 97470

TerraFirma Foundation Systems
932 Industry Drive STE 200
Seattle, WA 98188

TerraFirma Foundation Systems
13110 SW Wall St
Portland, OR 97223

TerraFirma Foundation Systems
10111 S Tacoma Way D5
Lakewood, WA 98499