We don’t always use spray foam…

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At Evergreen, we use the best insulation product for the job. In attics and sidewalls, that’s usually cellulose. In basements, it’s often spray foam – a product some homeowners have questions about.

We don’t always use spray foam insulation, but when we do, we insist on these best practices:

Sparing, targeted use;

Expert installation and thorough ventilation;

and thermal protection.

We’re also transitioning to products with low global warming potential (GWP) as they become available.

Wonder why? Read on…

What is SPF?

Spray Polyurethane Foam is a heat-activated plastic that is sprayed into place and serves as both an air barrier and an insulator. SPF is a mixture of two liquid chemical components and a blowing agent. As the ingredients react, the liquid turns foamy, expands, and hardens in place. This curing process can take anywhere from a few hours to a few days, depending on the type and thickness of spray foam, the temperature and humidity, and the technique of the installer. The finished product can be one of two types: closed-cell or open-cell. Closed-cell foam is more expensive than the open-cell variety, but it also offers a higher R-value, more rigid support, and greater resistance to water vapor.

Is SPF safe?

Spray foam insulation is a chemical product. Although the ingredients are potentially toxic and the mixture off-gasses while it cures, testing indicates that the final product is inert. However, if the mix of chemicals is off, there may be lingering odors and prolonged off-gassing. Since some people have reported health problems attributed to SPF, the EPA has issued information to make consumers aware of potential health risks, particularly during installation.

Is SPF environmentally friendly?

Spray foam’s high insulating and air sealing value has earned it a reputation as a green building material. However, even foams identified as soy- or castor-based include fossil-fuel-based materials. The installation of most closed-cell spray foam products depends on hydrofluorocarbon (HFC) blowing agents with high carbon dioxide content, which have negative global warming and ozone depletion potentials.

Fortunately, spray foam is getting more environmentally friendly. One manufacturer recently introduced a spray foam system incorporating a new blowing agent that offers the performance of HFCs but dramatically reduces the ozone depletion potential and global warming potential. Widespread adoption of this foam could save the equivalent of 60 million metric tons per year of carbon dioxide.

How does Evergreen maximize safety and minimize problems associated with SPF?

For both health and environmental reasons, Evergreen recommends these best practices when using spray foam insulation:

Sparing, targeted use:
Most issues with SPF occur when a problem with the chemical mixture goes unnoticed, either because it’s hidden in wall cavities or buried in a thick layer of foam. Evergreen only recommends foam on the foundation walls of existing homes, where it can be easily inspected, and at a 2” thickness, so it can cure completely.

Expert installation and thorough ventilation:
Most of the health and safety concerns about spray foam are focused on the installation period. Any installer should wear appropriate protective equipment (including respirators) and run a fan to vent the vapors generated during SPF installation. Evergreen takes this standard a step further, ventilating for the entire curing period (up to 72 hours) and maintaining a pressure difference that keeps basement air downstairs to ensure that off-gassing does not compromise the air quality of your living space. Based on EPA recommendations, Evergreen strongly advises that homeowners make plans for their families and pets to be out of the house overnight on the day of application.

Thermal protection:
Like other petrochemical products, spray foam is highly flammable. To ensure home safety, we coat fully cured foam with fireproof intumescent paint. This step is time-consuming but essential and required by Maine State fire safety codes, as it creates the same 15-minute fire barrier provided by drywall.

Transitioning to low GWP products:
Evergreen will transition to the new low GWP spray foam system as soon as it is reliably available. We look forward to this foam’s enhanced insulating properties, improved yield, and environmental benefits­, and will continue to recommend its use when it is the best available option.

Contact us today to learn more!

207-594-2244

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 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

Bryan, Dave and the entire Evergreen team are wonderfully professional, prompt and thorough. I enjoyed working with them and look forward to continued work as we upgrade our home! Thank you so much for your professionalism, fairness, time and diligence.

Cait

Yarmouth

I waited a year to write this review. Evergreen finished our job late last winter. Terrific results!!! we've gone from 12-day propane deliveries to 30+ day propane deliveries. The house is noticeably warmer. The Evergreen crew was/is professional, prompt, thorough, scientific, gracious and immaculate with respect to keeping our house clean. Money well spent.

John E.

Boothbay

I have always been impressed by the high level of service, quality of work, and excellent follow-through provided by Evergreen Home Performance in the three projects that they completed at the Wells Reserve at Laudholm over the past several years.

Paul D.

Wells

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

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

Nothing but good things to say. The guys that came and did the actual work were extremely nice and did a great job. The energy audit was thorough and I was presented with multiple improvement options, I was even given ideas for improvement that Evergreen didn't offer. I never felt like I was being "sold".

Ryan Adams

I would recommend Evergreen wholeheartedly because of their professionalism, their follow through, and thoughtful project planning.

Jennifer A

Evergreen has a professional and reliable team of people who do excellent work. If you want the best of the best in the area, select Evergreen to accomplish your insulation needs.

Mary E.

St. George

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 has insulated two homes that we've owned now and both times we experienced exceptional service and craftsmanship. Our rep, Justin, went above and beyond answering questions and the installation team was attentive to every detail, including pulling out old poorly installed insulation and redoing a bathroom fan that wasn't up to current code. They also left the place spotless every day! Our home is already so much warmer this fall and we are looking forward to using less oil this winter.

Eva G.

Falmouth

Evergreen did a fantastic job insulating our 1930's home. The onsite team was professional, clean, and really just a joy to interact with throughout the process. A blower test at the end showed a significant decrease in air leakage. I highly recommend Evergreen.

Kristen H.

South Portland

Evergreen removed and replaced the insulation in my attic. They did a great job!, Crew was excellent, and the whole thing went smoothly, and the attic was NOT easy to get into or work in, so kudos to some hard work done well!

Joel A.

Portland

I was very impressed by the professionalism of this company and the workers. Brian R. was very prompt in replying to my questions; the crew was meticulous in all parts of the work and attentive to the safety aspects concerning Covid; and Brian was extremely thorough in the final inspection. My attic is now snug and warm and I've noticed that the second floor is warmer as well.

Julia S.

Rockland

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