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Top-Rated Spray foam insulation pros in Seal-harbor - Updated Nov 2026

Avatar for Insulation of Maine, Inc.
Insulation of Maine, Inc.
4.9(
15
)

Serving Seal-harbor, ME and surrounding areas

Approved

In business since 2016

Free estimates

Customers say: Quick response

"Needed insulation in basement and in attic. Got a prompt response for an estimate, no delays in getting the work done. Charged what they said and were respectful of our schedules and to our home. Our house is noticeably warmer and less drafty. Helpful in getting the paperwork together for a state rebate. Great company."
Drill and fill
Insterior Dense pack
Dense pack cellulose
Dense Pack cellulose
dense pack exterior walls

+13

Response time1 day
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Apollo Insulation
Apollo Insulation
4.8(
5
)

Serving Seal-harbor, ME and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"They were very polite, very reasonable on price and their quality of work with some of the best I have ever seen. Would recommend to anybody looking to have any type of insulation work done"
Response time2 days
3 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for octagon-restoration
octagon-restoration
4.7(
96
)
Insulation - Install or Upgrade

Serving Seal-harbor, ME and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"I highly recommend Octagon Cleaning and Restoration. We recently purchased a house on the water and discovered that we had a mold issue in our basement. Matt and his crew were professional, informed us what needed to be done and completely eliminated the mold and the musty smell. Matt was very responsive to my texts, answered all my questions and a great representative of Octagon."
Water extraction.
Octagon vehicles
Drying structure damaged by water.
MOLD REMEDIATION
Dirty air duct.

+2

Response time6 hrs
Response rate100%
Recommended by90%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Insulation - Install or Upgrade

Serving Seal-harbor, ME and surrounding areas

In business since 1971

Credit card accepted

"Well, the first time the replacement was ordered it was the wrong one, which of course, delayed the installation a week. When it was finally installed I had to pay an additional $850 for code upgrades. This I was not informed of by Home Shield. Then we noticed that there was water on the garage floor and found that the pipe coming in from the wall was leaking at the wall so had to call the plumbing company back out to fix it. They first tried to say it was not their fault but since there wasn't a leak before they installed they did fix it. I have used Home Shield a few times before and never had a problem. Some of the companies they use are not the best so you have to research them before you commit. I have found HS service to be good if you do your homework. At the end of the day I was without hot water for almost 3 weeks but it was do to the plumbing company they sent out."
Additional Photos
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Additional Photos

+2

Recommended by65%of homeowners
Avatar for New England Home Renovations LLC
New England Home Renovations LLC
4.0(
311
)
Insulation - Install or Upgrade

Serving Seal-harbor, ME and surrounding areas

In business since 1983

Free estimates

Emergency services offered

"The gas company came in to replace a meter.  They found that the vinyl siding company we used in the past had cut and covered the safety valve.  The one night that it's super cold out, the gas company had to shut off our gas (heat)!! I called Richard at 9:00pm.  He got back to me first thing in the morning and had his crew take care of it by 7:30am.  They are really THE BEST!!  The gas company is here now and hopefully we'll have heat soon."
Before
After's
New boiler install
Removal of cast Iron to PVC.
Additional Photos

+37

Recommended by89%of homeowners
Showing 1-10 of 17
FAQs for spray foam insulation projects in Seal-harbor, ME

Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.

R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.

Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.

You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.

Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.