Indoor Air Quality | TerraFirma Basement Waterproofing
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Poor air

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

01 basement waterproofing set 5 before air quality
02 basement waterproofing set 5 after air quality
02 basement waterproofing set 1 before air quality
03 basement waterproofing set 1 after air quality
01 basement waterproofing set 11 before air quality
02 basement waterproofing set 2 after air quality
01 basement waterproofing set 20 before air quality
02 basement waterproofing set 20 after air quality
01 basement waterproofing set26 before air quality
02 basement waterproofing set 26 after air quality

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Basement Inspection


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.


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.

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!
Fair quote and strong workmanship. They came in and got the job done quickly. Our basement issue seems to be resolved. I'd recommend TerraFirma!
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!
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...
Terra Firma was really great to work with from our first meeting to the completion of the project. Hannah was our project designer, Kevin G. was our foreman, and Zach F. and Dorian assisted and all did a great job! Due to the cost of the project, we had to make a number of modifications along the way. And once they completed the demolition, they had to make another modification. However, their communication was great and they finished the project right on time and they did great, high quality work. I would definitely recommend Terra Firma for your basement issues.
TerraFirma has been great to work with overall on a big basement water problem I've been dealing with. Big thanks to Antonio R. and Gael O. for their work today - they were great!
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!
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.
Terra Firma did an excellent job waterproofing our basement. Their team was professional, efficient, and the results speak for themselves. Highly recommend Terra Firma for any basement waterproofing needs! Jonah did an amazing job during the sales consultation providing answers to all questions and for only what we needed. The crew of Rocky and Harley are awesome. They did such an excellent job and made sure to explain everything to me along the way. Thank you! 🙏🏻
With a water floored basement, we contacted Terra Firma to locate the water source which they did in no time. They explained, in detail, what would be done to fix the problem and went to work. They were respectful of our furnishings covering to protect them from limited dust. They were professional and the project was completed on time. We are very satisfied with the end result, quality of workmanship, and price. We would recommend them for foundation work of any type.

Basement Waterproofing

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

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?

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?

How should I HAndle a wet, leaky basement?

What are footing drains?