Radon Mitigation

Radon Mitigation

Basement Waterproofing Services That Set Evergreen Apart

Other companies stop at “dry.” We go all the way to healthy.

What’s Hiding in the Air Beneath Your Feet?

Radon is a colorless, odorless gas that can enter your home through cracks in the foundation – and long-term exposure is the number one cause of lung cancer for non-smokers in the U.S.

Unfortunately, many Maine waterproofing companies unintentionally make radon problems worse. The same holes created to remove water and moisture from your home can actually make it easier for radon to enter.

At Evergreen, we take a different approach. Our basement waterproofing services don’t just keep water out – they keep your air safe as well.

Waterproof Basement with Spray Foam
Evergreen team walking through basement

When you work with Evergreen, you get:

  • A free basement consult with a free radon test kit (*as long as you don’t already have a mitigation system in place and haven’t recently tested for radon)
  • Solutions that protect both your basement and your indoor air quality
  • A partnership with trusted local radon experts at Air & Water Quality, if mitigation is needed

Whether you already have a radon system in place or haven’t yet tested, we’ll make sure your waterproofing plan doesn’t just fix one problem while creating another. Radon levels can change over time due to weather, soil conditions, and home renovations. We recommend testing every 2-5 years, especially after significant home improvements (including air sealing and waterproofing services) or changes in occupancy.

Why Maine Radon Awareness Matters

Most of Maine is in Zone 1 on the EPA’s radon map – meaning we’re at the highest risk for naturally occurring radon gas. Approximately 36.5% of all radon tests in Maine exceed the EPA action level of 4.0 pCi/L, which underscores the importance of testing and mitigation.

If your home has:

  • A dirt-floor basement or crawlspace
  • Cracks in the basement floor or walls
  • A sump pit or drainage channel
  • Musty smells or signs of high humidity
  • Open, non-radon-tight drains

…then radon is a potential concern. And if you’re doing any kind of waterproofing, it’s essential to make sure it’s done right.

Old House In Meadow near seaside
Water Proof Basement Sump Pump

Drain the Water Out Right, Radon Tight!

At Evergreen, we combine water control with air quality awareness. That means:

  • Using sub-slab or sub-vapor barrier depressurization systems
  • Sealing sump pits
  • Properly installing vapor barriers

Homes naturally draw air up from their bottom levels into living spaces due to a building science concept known as the stack effect. That’s why depressurization in your basement or crawlspace is so important, as well as exhausting any soil gas outside of the home with a piped fan.

Schedule a Free Consult & Get Peace of Mind

We’re not just here to stop puddles. We’re here to improve your entire home – starting at the ground level. You shouldn’t have to choose between a dry basement and a healthy one. With Evergreen, you get both.

Evergreen team discussing basement inspection with homeowner

Call 207-594-2244 or book your free consult online. We can help you build a basement waterproofing plan that’s as safe as it is effective.

A healthy Maine basement isn’t just dry — it’s safe for your family, too.

BOOK YOUR FREE CONSULT + FREE RADON TEST KIT

We just finished a large project of air sealing and reinsulating our 1890s basement and attic which had been completely renovated 8 years ago but still felt cold and lacked proper energy assessment and corrections. We met with Justin in December and were very impressed with his knowledge, professionalism and communication skills and knew Evergreen was who we wanted to work with. Dave was our on hands project manager and was excellent. The office staff has been quick to respond and helpful as well when needed.

Emily Gallant

In the final stages of selling our home, and with a closing date set, an inspection came across an unanticipated issue in our attic. We quickly called in contractors, but nobody was able to identify the source of the problem. Then we thought of Evergreen. Brian Robinson was on site the next morning and immediately identified the source (a faulty roofing job completed three years earlier which had effectively sealed up portions of the ridge vent and restricted air flow - not easily visible with a quick inspection).

Robin McIntosh

Camden

The crew members from Evergreen Home Performance each made sure to greet us every day, while maintaining their distance in this time of the pandemic. Their work took a total of nine days, spread over three weeks. Even though they were working in multiple rooms of our house, as well as the basement and attic, they were unobtrusive and always cleaned up after themselves every day. The on-sight manager kept us informed of their daily schedule so we'd know which parts of the house they'd be working on.

Bob & Sue

Whitefield

We had Evergreen come out to our tiny old (100+ year old) house to see what they would recommend for decreasing our carbon footprint, saving money, and increasing our comfort in the cold season. Richard and Bryan were great to work with, patiently answering our many questions and walking us through multiple options. We could only afford to tackle a few areas this year; we ended up replacing some windows and having them weatherize the entire house.

Alan M.

Falmouth

Evergreen Home Performance shows its expertise from start to finish. Evergreen did three house projects in winter/spring/summer 2020 for me, attic insulation, crawl space under a porch insulation, and basement foam/vapor barrier. From my initial discussion with Bryan, I understood the reasons for choosing different types of insulation, the associated costs, and time estimates. Evergreen scheduled in advance, came when they said they would, and the crews were highly professional in their work and demeanor.

Iris S.

Portland

Thanks Evergreen Home Performance for helping to make our home more efficient. Many thanks as well to Bryan for the initial walk through and recommendations to make our home more efficient and to Dave, Roland, and Jacob for a job that was done professionally and courteous.  We were amazed at the level of efficiency and everyday they made sure to protect our floors, carpets, and furniture. We had daily discussions with Dave about progress and what was being done and where they were at in the project.

Carol Fink

We needed basement encapsulation to stop moisture coming up into the house from our regularly flooding basement. We had mold growing on windowsills and furniture. All the staff were friendly, respectful of our home, and easy to work with. Humidity has gone from 70% down to 40% and mold has not grown back after two months. Very grateful.

Sarah C.

Belfast

Very easy process, start to finish.  Friendly, professional, and really know their stuff.  They made some improvements to our condo and we were very happy with how it played out.  Would definitely recommend them.

Clayton Eames

Great company. Very professional and thorough. They take the time to explain everything and offer options to fit your budget. Wonderful experience from start to finish.

Bonnie Eustace

I cant say enough about this company and the benefits that it created for our family. They are very professional and have effectively re-insulated our home. The heating bill proves the point.

Bob O.

Springvale

Our basement was the eyesore of the house. I wanted to make improvements, but first needed to make structural, insulating and moisture mitigation improvements. Evergreen was professional and competent in taking on a complex project of not only encapsulation and insulation of basement and crawlspace, but completed needed improvements to the structural integrity of the wood floor platform above a crawlspace and brought in a concrete contractor to pour where there was once a rotting, tiered wood platform - replacing that area with a more functional and tight tiered concrete area.

Duane B.

East Boothbay

"Working with Evergreen from start to finish was a great experience." See what our customers have to say about their experience with Evergreen Home Performance. 

Jeff L.

Evergreen did everything they said they would and more. I actually don't mind going into the basement now since they sealed it. The air quality in the house is noticeably better and it's warmer in the winter. We can even store clothing down there where before, whatever was in there would mildew. Even the spider population declined! I used to vacuum so many of them from the corners of the ceilings in the house. Not any more!

Loriel Van Dusen

Evergreen is a terrific company to deal with. Polite and efficient crews, meeting deadlines and major reduction in our heat bills. They corrected a lot of issues we suffered from doing work with a shoddy building contractor. We would recommend them to anyone.

Mary Carey

Evergreen came back this year to finish insulating our house. We have been remodeling and renovating an 1850s cape for several years. Their employees are very professional and pleasant to deal with. Over several years Brian Robinson has been able to schedule us in for several small areas that needed addressing and finally turning a room we used to close off in the winter into a comfortable usable space. We primarily heat with wood and since Evergreens great work our furnace has only come on ONCE this winter. Fantastic. Really satisfied customer in Thomaston.

Chris F.

Thomaston

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