Effective radon testing & mitigation with TerraFirma

Radon Gas Mitigation by TerraFirma

Trusted radon contractors throughout Greater Portland

TerraFirma has been increasing the safety and indoor air quality in homes across Oregon since 2005. We are accredited by the Better Business Bureau, providing trusted radon testing, radon mitigation and radon education to local homeowners.

Nearly one of every fifteen homes in the United States shows signs of elevated radon levels. If you believe that radon gas is intruding into your home, it's time to take action against it.

TerraFirma can help you, by providing radon testing and a quote on the cost of a radon mitigation system in your home. Our professionals will work with you to keep your family protected. Call TerraFirma today at 1-844-311-8051 to schedule radon testing, and a no-obligation estimate for radon mitigation.

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radon gas entering home

Protect your home. Keep your home radon free with expert mitigation services.

Factors That Lead to a Radon Problem:

  • How potent the radon source is
  • How easily the radon enters in
  • The building's ventilation rate

It's easier than ever to get your home tested for a radon problem! TerraFirma can perform an inspection and conduct a radon test in your home in as little as two days!

To learn more about our radon services, call 1-844-311-8051 or contact us online today!

Important Facts About Radon

NRD Certified
  • Radon is an odorless gas produced by uranium decay in rocks and soil
  • Found in every state
  • Homes with crawl spaces a high risk for radon issues.
  • As cancer-causing as tobacco smoke & asbestos, causing 15,400-21,800 deaths yearly.
  • Radon level at which a mitigation system is needed: 4 pCi/L
  • Low-level radon exposure over time is more harmful than short periods of high-level exposure.
  • Radon concentrations are up to ten times higher during the winter.

Your Radon Mitigation System Installed

How a radon mitigation system works

TerraFirma's radon mitigation system uses sub-slab depressurization to reduce radon levels.

How Mitigation Systems Work

  • PVC pipe collects soil gasses
  • Radon is piped upwards in the building
  • A radon depressurization vent forces radon out from your house

As a full-service radon mitigation contractor, TerraFirma can also install a radon mitigation system that is compatible with the current waterproofing system in your basement or crawl space.!

TerraFirma also provides multifamily radon mitigation in compliance with the HUD Radon Policy. If testing confirms radon levels above 4 picocuries (pCi/L), mitigation must be performed by a radon professional reduce the level of radon gas in the air to a safe amount.

Looking for a price? Get a no cost, no obligation free estimate.

our service area

We serve the following areas

  • Adams
  • Adrian
  • Arock
  • Athena
  • Baker City
  • Bates
  • Bridgeport
  • Brogan
  • Burns
  • Cove
  • Crane
  • Drewsey
  • Durkee
  • Elgin
  • Enterprise
  • Haines
  • Halfway
  • Harper
  • Helix
  • Hereford
  • Huntington
  • Imbler
  • Imnaha
  • Ironside
  • Jamieson
  • Jordan Valley
  • Joseph
  • Juntura
  • La Grande
  • Lostine
  • Meacham
  • Milton Freewater
  • North Powder
  • Nyssa
  • Ontario
  • Oxbow
  • Pendleton
  • Pilot Rock
  • Prairie City
  • Richland
  • Riverside
  • Summerville
  • Sumpter
  • Ukiah
  • Union
  • Unity
  • Vale
  • Wallowa
  • Westfall
  • Weston
Our Locations:

TerraFirma Foundation Systems
761 NE Garden Valley Blvd.
Roseburg, OR 97470
1-541-204-4660


TerraFirma Foundation Systems
13110 SW Wall St
Portland, OR 97223
1-541-229-4049


TerraFirma Foundation Systems
10111 S Tacoma Way D5
Tacoma, WA 98499
1-253-201-1447