Energy Audits, Insulation, and Basement Waterproofing Services in Portland, ME

Make Your Portland, ME Home More Comfortable, Healthy, and Efficient

Beautiful Maine House

Whether you live in a historic West End Victorian or a 50s cape in Rosemont, chances are your home could use some improvements. Evergreen Home Performance is your trusted local Portland, Maine contractor with offices across the street from the Home Depot on Riverside. We’re the largest energy efficiency company based right in Portland and we’re here to guide you on your journey to energy-saving and home comfort upgrades.

From basement waterproofing to attic insulation, we offer proven solutions to make your home more comfortable, healthy, and affordable to live in, all year round. Since 2006, we’ve helped hundreds of Portland households improve their homes, and we’re ready to help you next!

Solving the Real Home Issues that Portlanders Face

We hear from Portland homeowners all the time about:

  • Wet basements and water pooling after storms
  • Musty smells and poor air quality coming from the basement
  • Drafty rooms, cold floors, and high heating bills
  • Frozen pipes, ice dams, and uneven heat in the winter
  • Bulkheads and basement windows that leak air or water
  • Moisture in crawl spaces causing rot and mold concerns
  • Overworked heating systems that never seem to shut off
  • Frustration from past attempts at “quick fix” renovations that didn’t last

From tight, 150-year-old crawl spaces to leaking foundation corners, we’ve seen it all—and we know how to fix it.

Evergreen’s Portland Services Include:

Home Energy Audits

Every home has a story—and we start by listening. Our comprehensive home energy audit reveals where your Portland home is losing heat, leaking air, or holding moisture. From Victorian-era homes to newer builds, Evergreen’s energy audits and thermal energy inspections lay the groundwork for smart, effective upgrades.

Learn More

Insulation & Air Sealing For Attics, Walls, and Basements

Looking for an insulation company in Portland that does more than just blow in cellulose? We combine insulation upgrades with strategic air sealing to deliver lasting results. Whether your home needs attic insulation, dense-pack wall insulation, or spray foam for your basement, we’ll create a plan that fits your house and your budget.

Learn More

Basement Waterproofing for Portland Homes

Basement waterproofing in Portland, Maine homes is essential—especially in older homes. Evergreen offers comprehensive waterproofing systems that include sump pumps, French drains, vapor barriers, and basement dehumidifiers. We provide crawl space encapsulation for homes with both basements and crawl spaces, and with all of our work, we drain the water out right, radon tight!

Learn More

Efficiency Maine Rebates & Financing

We help more Mainers claim Efficiency Maine rebates than any other insulation contractor—including homeowners in Portland. You could qualify for:

  • Up to $8,000 in Maine energy rebates
  • Up to $1,200 in federal tax credits
  • Financing through Efficiency Maine’s Green Bank or NEIF—with payments as low as $50/month

Hear From Your Portland Neighbors

Here’s what just a few of the many Portlanders we’ve helped over the last two decades have to say about working with Evergreen:

Evergreen Home Performance has now done a number of jobs for us to make our home more energy efficient. In 2019 they insulated our basement (spray foam) and replaced our basement windows, and this year they insulated our attic. Bryan Pringle, one of the energy advisors, could not have been more friendly and helpful in informing us of our options and helping make decisions, not to mention getting his hands dirty during the basement window operation. And he didn’t even make fun of us for inquiring, and eventually installing, a custom cat door into our basement window. Bruce Merryman and his technician did a fantastic job of squeezing into our tiny attic space and sealing up all the drafty areas before blowing in the insulation. I often tell my husband that if only every experience with home improvements could be as easy as working with Evergreen, then my life would be a lot easier.

Caroline Sanford

We found Evergreen online, and are very happy that we did. The team was courteous, and friendly, in a genuine way. And they kept the house very clean, including meticulously installing and dismantling barriers for dust control, every morning and evening. We felt in good hands the whole way through. The attic looks like it’s been sealed up by NASA now (not kidding). Towards the end of the job, there were some details that had to be dealt with unexpectedly. Brian came through with some ideas, and put in extra time to try to resolve things. And Chris Kessler was exceptional. He first came to create an estimate, and was very knowledgable and thorough. Further, he paid close attention to the legal/administrative end of things, and was able to ensure that Efficiency Maine contributed a very substantial sum to the project cost. All in all, I’m extremely happy with Evergreen, and would not hesitate to call upon them again. Highly recommended.

Gael McKeon

Working with Evergreen was great. Chris came out for an energy audit, gave us lots of good insight on things we could do, listened to our concerns, and put together a thoughtful proposal. The crew came out over a couple of days and did a fantastic job with the installation, always leaving the work areas spotless at the end of the day.

Jason Dark

We could not have had a better experience working with Evergreen Home Performance specifically under the guidance of Chris Kessler and the crew project managed by Red. All aspects of the work were well communicated and executed with precision. Chris took the time to fully explain the “why’s” of the scope of work they were doing and even went the extra mile to point out some DIY improvements we could do ourselves to further the impact of the job. Red was a wonderful communicator each day the crew was at our home and always left the house cleaner than when they had entered. We are noticing a huge difference in the comfort of our home, thank you Evergreen!

Emily Brunick

Evergreen Home Performance Team Setting-Up At House For Work

Get Local Expertise with Evergreen

We’re more than just contractors in Portland, Maine—we’re your partners in making your home more efficient, healthy, and resilient. We’re members of Portland Buy Local and have employees who live in the city. From attic insulation to crawl space encapsulation, we’ll help you build the right plan and get the job done right.

Let’s build the right plan for your Portland home — call 207-594-2244 or book your free consult online.

From flooding basements to chilly bedrooms, Evergreen helps Portland homes stay dry, warm, and energy efficient.

SCHEDULE YOUR FREE CONSULT TODAY

My husband and I bought a home on the water in Owls Head and decided to make the investment in Evergreen's recommendations for insulation. Brian Robinson spent 3 hours examining every nook and cranny before he made practical suggestions and explained them thoroughly to us.

Marie McNeely

Owls Head

We had Evergreen redo the insulation in our roof. The team handling our project did a great job. They left the house spotless. We've already noticed the difference in how much better our house is retaining heat. I would definitely recommend and will use them for future projects.

Ffej C.

South Portland

Led by Brian Robinson, the Evergreen Home Performance team just completed an insulation refit at my home. It was truly a great experience from start to finish, a period of time that was a fraction of the time that I originally anticipated due to the team's unbelievable work habits and professional knowledge of their tasks. As impressive were the communication skills and friendliness of each and every member of the team.

Anne W.

Rockport

I am very pleased with my experience with Evergreen Home Performance. I met several times with Richard Burbank and he was very detailed in his explanations to all of my questions. He provided me with several options for improving the insulation to our home. The team of installers were very professional and respectful of our home. They did a great job of cleaning up every day after the days work and they were also very responsive to all my questions as well as we collaborated to get our home better insulated. It was a pleasure to work with Richard and…

Brian C.

Falmouth

Update 12/2018: Evergreen has completed Phase II of my house (insulating and installing air/moisture barrier on exterior walls, replacing old windows) and now that heating season is upon us, the difference is astonishing. The house is tight as a drum and so easy to keep warm. Worth every penny. Thank you all! Working with Evergreen was a positive experience from start (no charge energy audit) to finish (a MUCH more comfortable home). Brian Robinson spent a lot of time with me on the audit, explaining clearly what he was finding in my ca.

Rebekah W.

Rockport

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

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

Evergreen was so helpful in securing us Efficiency Maine funding for a big attic insulation project early this winter. They did all of the paperwork, and totally guided us through a vermiculite removal process that included a payment from a trust for the procedure. I could instantly feel the second floor being so much warmer than before. The boiler does not kick on nearly as frequently since they completed the job. It was worth every penny! Brian Robinson was so thorough throughout the whole process including a full walk through after the job had been completed.

Todd W.

Camden

Working with Brian and with Nate and the rest of the crew was a pleasure. They made everything very easy and understandable. This was a major renovation and they were always at the ready with a lot of information. We had an extensive renovation on the basement which was a dirt basement and it came out beautifully. We can already tell from all of the insulation work what a difference it's made in sound and temperature. Brian worked with me on the rebates that are available when you do this kind of work. I would highly recommend this company to…

Valerie L.

Rockland

The folks at Evergreen did a great job fixing a rather major insulation problem in my house, which they helped identify with a great audit. When the work began, they were thorough, upbeat, and -- dare I say it -- efficient. I strongly recommend them.

Michael Williams

I had gotten estimates from several other companies, but Evergreen was in another league entirely with their professionalism. If you want the job done correctly, I couldn't recommend this company enough.

Rayna Mayo

Freeport

My experience with Evergreen was excellent. From their thorough and thoughtful initial consultation to their detailed post-work visit, the team was professional, knowledgeable, and responsive. Their workmanship was top notch. Our home is now much warmer and more efficient. I highly recommend their services!

Douglas R.

Edgecomb

Awesome company. It was a few years ago that they did the audit and then we commissioned them to do the work. We subsequently sold our house and moved to South Africa, but their level of service and expertise will live on.

Odette Brown

We just finished a large project air sealing and reinsulating our 1890s basement and attic. It 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.

E Gallant

Kennebunk

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

Portland Buy Local
Efficiency Maine
EPA Lead-Safe Certified
Building Performance Association
BPI Certified