Indoor Air Quality | TerraFirma Basement Waterproofing
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Two large, flexible HVAC ducts connected to a dehumidifier in a basement.

Poor air
quality

Most indoor air quality issues start in dark, wet areas of the house like the basement or crawl space. Mold thrives on this kind of environment and will commonly be accompanied by a nasty smell.

After removing any organic materials (mold) and making sure your waterproofing system is working correctly you should still consider other airborne hazards like dust mites and bacteria. These can also be endangering your health and fortunately can be prevented with the use of a dehumidifier.

Before and After

Abandoned basement with exposed pipes, moldy walls, and a damaged floor.
Before
Clean basement with exposed pipes, white walls, and a concrete floor.
After
Dirty basement with exposed pipes, moldy walls, and scattered debris on the floor.
Before
Basement with exposed pipes, white walls, and concrete floor, appearing partially cleaned.
after
Sump pump in a basement corner with rough concrete and exposed pipes.
BEFORE
Basement corner with fresh concrete patch and exposed pipes.
AFTER
Empty basement with exposed ceiling, stained concrete floor, and water heater.
BEFORE
Clean basement with exposed ceiling, white plastic walls, water heater, and shelving.
AFTER
Unfinished basement with concrete floor, exposed wooden framing, and block walls.
BEFORE
Partially finished basement with white painted block walls and exposed wooden framing.
AFTER

Schedule your free
Basement Inspection

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Schedule your free
Basement Inspection

Book Now

TERRAFIRMA IN ACTION

Leaky basement? Moldy odors? You’re not alone. We’ve helped families across Oregon & Washington breathe easier with our Basement Waterproofing Systems.
Check out some tips and examples of our waterproofing work here.

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Basement Waterproofing in Portland, OR

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Homeowner
REVIEWS

We’ve waterproofed basements for over 25 years from Medford to Salem, and Vancouver to Tacoma. Don’t take our word for it – see what our clients have to say.

K S
K S
Robert Carmona and his team were professional, thorough, and pleasant to work with. They did an excellent job leak proofing our basement - we're thrilled with the result! They also left the place better than they found it. I so appreciate their hard work. Thank you Robert et al!
Kristen A.
Kristen A.
I love TerraFirma. We had a new foundation with a sump pump and dehumidifier four years ago. First, it is so great having a dry basement! Each year, TerraFirma sends someone to check the sump pump and the dehumidifier. Jeff did the inspection last year and this year. He showed me what he was doing, documented with pictures, answered my questions and showed up on time! This has been my experience with every interaction I have had from the beginning of the project to the follow-up.Here is a picture of the new foundational wall and my workout area.
Bruce M.
Bruce M.
We called TerraFirma with a pretty significant problem. We had just purchased a home and were a bit misled on a couple of items. The basement and crawlspace were mold infested (which we did know). What we did not know was that at times of the year, there would be some standing water in the crawlspace. We also didn't know that the drain from the sump pump was actually underwater (adjacent lake), nor did we know the pool backflushed into that same line and actually would enter the crawlspace whenever that process occured. The crawlspace was unvented and unconditioned....the perfect storm of BAD! Our goal was to first remediate the mold and then resolve the issues that allowed the mold to grow in the first place. Enter Terra Firma. Tulane and Terra Firma stood head and shoulders above every other company I spoke with. It wasn't jus that they were going to fix it- we literally walked through every step and every product-I knew what I was buying before we started. The crew was professional, on time and did exactly what they said they would do and in the time frame promised. With Terra Firma, we waterproofed and encapsulated our crawlspace, we insulated the crawlspace, we installed new sub floor drainage with new sump pumps with battery backup to lower the water table under the house (that now drains above the high water line), we installed new structural floor posts where others had rotted, we installed a bypass for the pool overflow and we installed dehumidification and we are in the process of now conditioning the space. Terra Firma led the way and did an excellent job both on the communication and on the installation (at the price originally quoted!). I would highly recommend this firm for anyone with complex and challenging crawlspace issues. Great work and fantastic team from start to finish!Bruce McKee
Tyler M.
Tyler M.
As a residential broker in western WA I’m always interacting with different foundation & basement specialists. TerraFirma is the best I’ve come across. The team there, especially Seth, is top notch. I always get an accurate & reasonable solution from them regardless of the size of the job. I’m working with Seth on a project now & it’s been great. Highly recommend!
Cherie W.
Cherie W.
Seth has been really awesome. He is professional and very patient. We had many questions. He took time to answer them all and come over twice to make sure the detail were accurate. I'm happy to have met him and look forward to our basement being fixed!
William Z.
William Z.
I had a positive experience with vapor barrier application to my basement walls, a draining system install that wraps around the basement walls, installation of a sump pump, foundation crack repair, sealing/ vapor barrier install in a crawlspace.
PatOrMonty Scott C.
PatOrMonty Scott C.
Our house is nearly 100 years old, with crumbly concrete and bowing walls in the basement and lots of "do it yourself" work done on it. We love it. But it is a challenge. "Nothing in this house is square and everything is out of round." Terra Firma installed Everbrace steel walls and pillars to stabilize the foundation. Heather, Rocky, John and Anthony were all great workers, from customer relations to brute labor and skillful application. They were on time, polite, informative, and on task. Our house will stand another 100 years thanks to them.Pat S.
Lmhdawg
Lmhdawg
I recently purchased a home that I knew had water encroachment in the basement. Terra Firma came and presented what can be done and I knew it had to be done. Tieran and his crew came in and did exactly what was explained to me. They answered all my questions and I feel very confident it will be a dry basement going forward. I highly recommend this company for any work that needs to be done to foundation, water issues, crawl space etc. Fantastic company!
Shalena H.
Shalena H.
Our house is built in the SW hills of Portland originally in 1938, with a 2003 addition. TerraFirma waterproofing product has been a significant update to a...
Michael M.
Michael M.
We had an excellent experience with TF earlier this summer. Morgan spent many hours at our house evaluating our foundation, clearly explaining our options, and checking up on the crew once work commenced. Foreman Luis and his team (Tony M & Gustavo) were professional and efficient, and kept things on track. Thanks also to Heather for coordinating the whole operation. We are pleased with the outcome and look forward to a dry basement!
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Basement Waterproofing
HOMEOWNER QUESTIONS

Should I be concerned about damp spots on my basement carpet? What should I do?

If you have wet carpet in your basement or damp spots on the floor or baseboards, this could be a sign that you have a leaky basement issue. Wet basements create more problems than just wet carpet. Mold or mildew could be growing under the carpet, which fills the air you breathe with musty odors and hazardous mold spores.

The first step in fixing your leaky basement is finding the source of the water intrusion. Save yourself the hassle. One of our basement waterproofing experts will inspect your basement for waterproofing problems and recommend the best solution for your home.

Why should I trust your methods to waterproof basements?

TerraFirma is more than just your local waterproofing contractor. We are proud to be part of The Basement Systems® International Network, which comprises more than 300 elite basement waterproofing and crawl space repair contractor companies all across the United States and Canada.

As a member of the Basement Systems® International Network, TerraFirma is able to provide our customers with industry-leading products and warranties, while remaining committed to personalized service and custom solutions.

My basement has flooded in the past. What can I do to prevent this?

Basements can flood from a number of areas, including: floor cracks, leaking or burst pipes, leaking windows, hatchway doors, sump pump failure, and water heater failure. Our local experts will help you understand and address the cause of your basement flooding.

How should I handle a wet, leaky basement?

  • Avoid any electrical hazards – Avoid touching any devices or wires
  • If possible, pump out any standing water
  • Dry out and discard any wet non-essential organic materials such as wood
  • Find the cause of leaking and flooding. Our local experts will help you find the causes and provide you with a tailored solution to your basement.

What are footing drains?

Footing drains are installed just outside the foundation of your home’s basement. These are thick pipes with holes designed to let water flow inside. A layer of stones is put on top of the drainpipe to prevent soil backfill from blocking the pipe. However, with time, backfill can seep through the stones and clog the pipe. Improperly maintained footing drains can lead to a leaky basement.

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