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Home Performance Services in South Portland, Maine

Insulation, Heat Pumps &
Air Sealing in South Portland

South Portland is full of postwar ranches and Capes along Broadway and Cottage Road built in the 1950's-60s with minimal insulation. Willard Beach has older cottages, and the Cash Corner and Mill Creek areas have a mix of housing ages. We upgrade attics, dense-pack walls, and air seal these homes regularly. Just 7 miles from our Westbrook headquarters.

  • Blown-in insulation for attics, walls, and basements
  • Heat pump installation for year-round comfort
  • Professional air sealing to stop drafts
  • Efficiency Maine rebates up to $18,100

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What We Do for South Portland Homeowners

Insulation

The 1950's-60s ranches and Capes along Broadway and Cottage Road were built with minimal insulation that has settled over decades. Willard Beach cottages often have none at all. We bring attics up to R-50 and dense-pack walls without removing interior finishes.

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Heat Pumps

Postwar ranches along Broadway typically rely on oil boilers with no cooling. A ductless mini-split supplements the existing heating system and adds air conditioning. Newer builds near the Maine Mall are generally better insulated but still benefit from heat pump efficiency.

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Air Sealing

The 1950's-60s ranches and Capes in South Portland have significant air leakage through uninsulated rim joists, recessed lights, and plumbing penetrations. Willard Beach cottages face coastal wind infiltration on top of that. We use blower door testing to find and seal every gap before insulating.

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Blown-in cellulose insulation installed in a Maine attic Mini-split heat pump installation in a Maine home Blower door air leakage testing during a Maine home energy project

Why South Portland Homeowners Choose Horizon Homes

We know the neighborhoods, the housing stock, and the energy challenges specific to South Portland.

1

Postwar Ranches & Capes

The Broadway and Cottage Road corridors are lined with 1950's-60s ranches and Capes built with minimal insulation. These homes are solid but drafty, with settled attic insulation and uninsulated walls. We upgrade them to modern standards without disrupting the interior.

2

Cottages to New Construction

Willard Beach has older cottages that need comprehensive weatherization. The Cash Corner and Mill Creek areas have a mix of ages. Even newer builds near the Maine Mall benefit from air sealing and attic upgrades beyond code minimums.

3

7 miles From Our Office

South Portland is one of our closest service areas. Whether you are on Cottage Road, near the Maine Mall, or in the Meetinghouse Hill neighborhood, we can get to you quickly with no travel surcharges.

What Our Customers Say

"Horizon Homes is excellent. They have supported us for a number of projects across insulation and carpentry and I can't recommend them enough. Cody is extremely thoughtful and has supported us over hours on the phone answering questions."
AM
Andrew M., PortlandVerified Google Review
"The crew was meticulous. They sealed every penetration before blowing in the insulation, explained exactly what they were doing, and left the attic cleaner than they found it. Our heating bill dropped noticeably the very first month."
JH
Jennifer H., Cape ElizabethVerified Google Review
"No more cold floors, no more drafts in the living room. The difference after insulation and air sealing was immediate and dramatic. I wish I had done this years ago. Horizon handled the Efficiency Maine rebate. I didn't have to do a thing."
DL
Diane L., FalmouthVerified Google Review

Rebates Available for South Portland Homeowners

We handle all Efficiency Maine paperwork so you can focus on enjoying a more comfortable home.

$18,100
Max Combined Rebate
$1,100
Heat Pump Water Heater Rebate
0% APR
Financing Available

Schedule Your Free Assessment in South Portland

We will identify where your home is losing energy and recommend the most cost-effective improvements.

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