Spray Foam Insulation in Portland, ME

Find top-rated spray foam contractors and save up to 37% on energy bills

Compare 4 verified spray foam insulation contractors serving Portland, Maine, backed by 198 customer reviews averaging 4.5★. Whether you're insulating a new build, retrofitting an existing home, or upgrading attic and crawl-space insulation, these pre-screened Portland contractors handle both open-cell and closed-cell spray foam. Homeowners here typically cut energy bills by around 37% — get free quotes and read verified reviews below.

💰 Estimated Energy Savings in Portland

37%
Average Energy Savings
Typical range: 32% - 42%
$1,732
Estimated Annual Savings
Based on $390/month average energy cost
4 years
Average Payback Period
Return on investment timeline

Note: Actual savings vary based on home size, current insulation, energy rates, and climate conditions. These estimates are based on Department of Energy data for Very Cold.

Verified Contractors in Portland

4.7
113 Google reviews

Recent Reviews:

Michelle Balansag★★★★★2 months ago

Evergreen made the home performance process easy to understand, with clear recommendations and communication from scheduling through follow-up.

Dennis Doyle★★★★★3 weeks ago

I had a great experience with Evergreen. They insulated my attic, and it’s made a tremendous difference! Their crew was professional, courteous, and did top notch work. And the folks at Evergreen made the process of coordinating with Efficiency Maine for rebates/financing easy! They helped make it affordable, and I probably wouldn’t have been able to do it without them. My project took place toward the end of the year, so there were a lot of hurdles, like holidays, snowstorms, etc. They made sure the work was completed before year end deadlines and ensured that I didn’t miss out on any rebates or tax credits. I would have no hesitation using them again, and I highly recommend them!

Scott Cronkhite★★★★★4 months ago

Working with Evergreen was great. We explained to them the problems that we were having and they came up with the best solution and worked within our budget and helped us with all of the rebates available to us. Workers showed up on time and worked very cleanly. Once the project was completed it was like they were never there. Our salesman Dave was also great, anytime we had a question he was always available with an answer. The rest of the staff that we dealt with as well were great and professional during the entire process as well.

4.7
27 Google reviews

Recent Reviews:

Abel Phillips★★★★★7 months ago

Just had our first experience working with Southern ME Spray Insulation and it won't be our last. Molly was super helpful and efficient checking out the project and providing a quote, then saved us with a last minute schedule change for inspections. The guys installed in sweaty conditions and were very conscientious of the site and answered all our questions. Cleanup exceeded expectations. Thanks to them, our client's home will be more comfortable to live in, and more affordable to condition. Hire this team! 🙏 Thanks again, hope it's a great weekend!

Jim Smith★★★★★2 years ago

This is an excellent company that will do a great job handling all your weatherization and insulation needs!! Landlords pay attention: The tenants in my three unit rental building building met the income requirements for the York County Community Action Weatherization Program. Southern Maine Spray Insulation was contracted by the community action program to do the work which was extensive. It required three days of work that left nothing undone. Molly was a pleasure to deal with and she helped schedule the work. Communication was always prompt and accurate! Patrick, the owner, worked as hard as any of the crew. They were always prompt and very considerate of the tenants and my concerns. They worked as a efficient team that clearly enjoyed each other and they were very proud of their work! They were awesome and hard working the entire time. Be a sport and buy them lunch and perhaps a tip if you like their work as much as I did! I will also be contacting Molly in the near future to have a look at my own house.

Aleks Janjic★★★★★2 years ago

These folks installed new basement windows and sprayed the stone foundation walls in our basement. Could not be happier with the work. Turned a dusty dingy basement into a bright, clean, and warm space. The cleanup after the work was great; could hardly tell the crew was even there after they finished. Molly is great source of information and was fantastic to work with throughout the whole process. The estimate was detailed and the process with the state rebate well defined. Highly recommended!

4.4
45 Google reviews

Recent Reviews:

Michael Madore★★★★★2 years ago

Great Service. I will be using them again! I got a call back the day after I left a message. Sean came out maybe a day later. I had a quote the next morning. We put a day on the calendar for them to do the job and they showed up on that day! They did spray/fiberglass combo to keep the cost down for me...but gave me a few different options but the combo make the most sense for the job. When the project was done I had a few questions and Sean answered them and even sent a crew back to tweak a few things make sure it was all done to my satisfaction. Hire these guys! Don't bother calling 2-3 other places. They all called me back 2 days after I had already scheduled an appointment with NE Spray. Thanks Sean.

Bill Braisted★★★★★7 years ago

Exceptional experience. Paul Alcorn was very easy to work through the estimate with, Craig was able to fit me in to an open slot almost immediately and the experienced installers did a great installation job. The project management and follow up were very professional and impressive. This was definitely a positive experience and a company I will surely work with again.

Leo Bulley★★★★★8 years ago

This company is the best of the best. Had another company come they didn't have a clue. I had expected my job to be about a week long. Their fiberglass guy came and got the entire job done that day. I am more than impressed. He was polite and happy to answer any questions I had. This company and that guy will do all my projects from now on. Thank you.

4.1
13 Google reviews

Recent Reviews:

John Murray★★★★★2 years ago

Professional insulation company that does outstanding work. They communicated well, showed up when scheduled and performed admirably. Their quality was first rate. Would recommend them for any exterior foundation waterproofing application.

Dirk Gntly★★★★★8 years ago

These guys do great work! Call them for all of your insulation, gutters, shelving and fireplaces.

Tricia Tetreau★★★★3 years ago

They do a great job and prices are fair to the market. A bit of a challenge on reaching them because they are so busy, but they take care of it quickly when you let them know what is going on

Frequently Asked Questions — Spray Foam Insulation in Portland

These are the questions Portland homeowners ask most about spray foam cost, R-value, and open- vs. closed-cell foam — with context for local pricing and roughly 37% typical energy savings. Compare the 4 verified Portland contractors above for exact quotes.

Why is spray foam insulation especially important in cold climates like Portland?
In cold climates like Portland, ME, proper insulation is critical to preventing heat loss, ice dams, and frozen pipes. Spray foam's air-sealing properties stop the cold air infiltration that traditional insulation cannot address. It also prevents the moisture buildup inside walls that leads to mold in cold-weather freeze-thaw cycles. Homeowners in ME typically save 25–35% on heating costs. Note: in tightly sealed homes, proper mechanical ventilation is commonly recommended to maintain fresh air exchange without losing the heat you've paid for.
Does spray foam insulation prevent ice dams in Portland?
Yes — spray foam insulation is one of the most effective solutions for preventing ice dams in cold climates like Portland, ME. Ice dams form when heat escapes through a poorly insulated attic, melting snow that refreezes at the eaves. By creating an air-tight thermal barrier in the attic, spray foam eliminates the heat loss that causes ice dams in the first place.
What R-value do I need for spray foam insulation in Portland?
For cold climates like Portland, ME, the Department of Energy recommends attic insulation of R-49 to R-60. Closed-cell spray foam provides R-6 to R-7 per inch, meaning 8–10 inches achieves code-minimum performance. Open-cell foam at R-3.5 per inch requires greater thickness. A local contractor familiar with ME building codes can recommend the exact specification for your home.
Is spray foam insulation worth the cost?
For most homeowners, yes. Spray foam creates an air-tight seal that traditional insulation cannot match, reducing energy bills by 15–35% annually. It also adds structural rigidity, acts as a moisture and vapor barrier, reduces outside noise, and can increase home resale value. The higher upfront cost compared to fiberglass is typically recovered within 3–7 years. One important note: because spray foam creates a very tight building envelope, proper mechanical ventilation is important to maintain healthy indoor air quality and prevent interior moisture buildup. This is typically handled by an Energy Recovery Ventilator (ERV) — a system that brings fresh outside air in while pushing stale air out, recovering the energy from the outgoing air so you don't waste what you paid to heat or cool — or a Heat Recovery Ventilator (HRV), which works similarly but is optimized for cold climates. A qualified contractor will assess whether your home needs ventilation upgrades as part of the installation.
How much does spray foam insulation cost in Portland, ME?
In Portland, ME and the surrounding area, spray foam insulation typically costs $1.00–$3.00 per square foot installed, depending on the type and your home's specifics. Open-cell foam runs $0.44–$0.65 per board foot, while closed-cell foam costs $1.00–$2.00 per board foot. A typical 2,000 sq ft home attic in Portland costs $2,000–$6,000. Most Portland homeowners recoup this investment within 3–7 years through energy savings of 15–35% annually.
What is the difference between open-cell and closed-cell spray foam?
Open-cell spray foam is softer, less dense, and less expensive. It expands significantly and is ideal for interior walls, attics, and soundproofing. Closed-cell spray foam is denser, stronger, and provides a moisture barrier — making it better for exterior applications, crawl spaces, and areas prone to flooding or humidity. Closed-cell also has a higher R-value per inch (R-6 to R-7 vs R-3.5 to R-4 for open-cell). One key difference: open-cell foam allows some vapor movement, while closed-cell acts as a vapor barrier — an important consideration for your home's ventilation needs.
How long does spray foam insulation last?
Spray foam insulation is one of the most durable insulation options available, with a lifespan of 80+ years when properly installed. Unlike fiberglass batting which can sag and settle over time, spray foam maintains its shape and insulating properties indefinitely. It will typically outlast the building it is installed in.
How do I find a qualified spray foam insulation contractor in Portland, ME?
When searching for a spray foam contractor in Portland, ME, look for ones who are licensed, insured, and have verifiable reviews. Spray foam requires specialized equipment and training — improper installation can cause off-gassing, adhesion failure, or fire hazards. Ask for references, verify their insurance, and get at least 2–3 quotes. A qualified Portland contractor will also assess your home's ventilation needs — a tightly sealed spray foam installation requires adequate mechanical ventilation to prevent moisture and indoor air quality issues. FoamMatch pre-screens all listed contractors in Portland for licensing and insurance so you can compare verified professionals in your area.
How long does spray foam installation take?
Most residential spray foam jobs take 1–2 days depending on the size of the area. A standard attic takes 4–8 hours. After spraying, the foam cures within 24 hours, though most contractors recommend waiting 24–72 hours before occupying the space due to off-gassing during the curing process.
Does spray foam insulation need to be replaced?
No — spray foam insulation does not need to be replaced under normal circumstances. Unlike fiberglass insulation which degrades over time, spray foam maintains its R-value and air sealing properties for the life of the building. The only reasons to remove or replace spray foam are water damage, renovation work, or improper original installation.

Spray Foam Contractors Near Portland, ME

Not finding the right fit in Portland? Many spray foam contractors travel to nearby towns. These communities within about 60 miles all have verified contractors listed.