Home Performance Services in Portland, Maine
Portland's housing stock is incredibly varied: West End Victorians with balloon framing and zero wall insulation, Munjoy Hill triple-deckers, Deering Center bungalows and Capes from the 1920's-1940's, and Back Cove homes with ice dam issues. We work in Portland every week, insulating, air sealing, and solving comfort problems across every neighborhood. Just 8 miles from our Westbrook headquarters.
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West End Victorians with balloon framing often have completely empty wall cavities. Woodfords Corner 1940's Capes have minimal attic insulation. Deering Center bungalows need wall and attic work. We dense-pack walls without removing plaster and bring attics up to R-50 across every era of Portland housing.
Learn MoreMunjoy Hill triple-deckers where each unit needs its own approach, West End Victorians without ductwork, Deering Center homes supplementing oil boilers, ductless mini-splits work in all of them. We size and place units based on the specific layout and heating needs of each Portland home.
Learn MoreBalloon-frame Victorians on the West End have unblocked wall cavities that act like chimneys. Back Cove homes get ice dams from attic air leakage. Triple-deckers on Munjoy Hill have complex, multi-unit air pathways. We seal every penetration before insulating, using blower door diagnostics to verify results.
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We understand Portland's housing stock because we work in the city every week.
Portland has some of Maine's oldest and most varied housing. West End Victorians with balloon framing, Munjoy Hill triple-deckers, Deering Center bungalows, Woodfords Corner 1940's Capes, and Back Cove colonials each require different approaches. We know how to insulate these structures without damaging historic finishes.
Back Cove area homes are prone to ice dams from attic air leakage. West End Victorians are notoriously drafty because of balloon framing. We address the root causes, air sealing and proper , rather than just treating symptoms.
Our Westbrook headquarters is a short drive from any Portland neighborhood. We serve Munjoy Hill, the West End, Deering, Back Cove, Woodfords, Stroudwater, and every area in between. Fast response, no travel surcharges.
"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."
"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."
"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."
A Portland couple was spending $5,500/year on oil heat in their 1952 Cape Cod. The second floor was 8-10 degrees colder than the first floor, and ice dams appeared every January.
After comprehensive air sealing and insulation, including dense-pack cellulose in the knee walls, sloped ceilings, and attic, their oil consumption dropped from 1,300 gallons to 750 gallons per year. The ice dams disappeared completely.
Related: See what a home energy audit revealed about a 1940's Portland Cape. A Woodfords Corner homeowner cut air leakage by 50% and heating bills by 30% with attic and rim joist work.
As an Efficiency Maine registered vendor, we handle all the paperwork. Portland homeowners are eligible for the same Efficiency Maine incentives as every Maine resident.
