Home Performance Services in Topsham, Maine
Topsham sits across the Androscoggin from Brunswick, and while the two towns share a zip code and a school district, the housing stock tells a different story. The Topsham Historic District has 19th-century Federal and Greek Revival homes that predate insulation standards entirely. The larger part of town is 1970s through 1990s suburban — ranch houses, Capes, and split-levels built when fuel was cheap. Over half of Topsham homes still heat with oil, and most of town has no access to natural gas. A heat pump paired with tighter insulation is the practical path to lower bills and better comfort. Just 31 miles from our Westbrook shop.
We call within 1 business day
The 1970s and 80s ranch and Cape homes that make up most of Topsham were built with R-11 fiberglass batts in 2x4 walls — code minimum at the time, well below what Maine winters demand. Decades of settling and moisture cycling leave gaps. The historic homes near Elm and Bowdoin streets have no wall insulation at all. We dense-pack walls without demolition, bring attics to R-49, and seal rim joists with spray foam. Older homes see dramatic improvement. Even the 1980s ranches respond well to a full weatherization package.
Learn MoreMost of Topsham has no access to natural gas, which makes the oil-to-heat-pump conversion one of the most financially compelling upgrades available. A ductless mini-split system running on electricity offsets significant oil use. Topsham has a large older population — many homeowners are on fixed incomes and have lived in their homes for decades. Lower monthly heating costs and the addition of air conditioning without a second system make heat pumps a practical upgrade on both comfort and budget grounds.
Learn MorePlatform-frame construction from the 1970s and 80s has predictable weak points: the rim joist, the top plate where the wall meets the attic floor, and around penetrations for plumbing and wiring. These are the leaks that drive cold floors and high heating bills. In the older historic homes on the west side of town, the leakage paths are more complex. We use blower door diagnostics to locate and seal every major leak before improving insulation — which is the sequence that actually delivers lasting results.
Learn More
Topsham homes span two centuries of construction. We work across all of it.
A lot of Topsham homeowners have lived in the same house for 20 or 30 years. They know their home's quirks: the cold bedroom over the garage, the drafty corner in the living room, the heating bill that doesn't seem right for the square footage. We assess what's actually happening and recommend what will make the biggest difference — not the most expensive upgrade.
With no natural gas available in most of Topsham, homeowners are choosing between oil, propane, and electricity. Heat pumps powered by electricity are significantly cheaper to operate than oil or propane at current prices. The Efficiency Maine rebate of up to $18,100 combined with 0% APR financing makes the upfront cost manageable. We help you understand the numbers before you commit.
A straightforward trip up I-295 to Route 196. No travel surcharges for Topsham projects. Efficiency Maine rebates apply fully to every Topsham homeowner.
"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 Topsham homeowner had lived in their 1,600 sq. ft. ranch for over 25 years and was burning close to 900 gallons of oil per winter. Blower door testing showed 2,800 CFM50 of air leakage. The original R-11 batts in the walls had settled and left gaps. The attic had a partial layer of insulation from an earlier project with no air sealing underneath.
We air sealed the attic floor, added cellulose to bring it to R-49, dense-packed the walls, and sealed the rim joist. Oil use dropped to around 540 gallons the following winter. The homeowner later added a two-zone heat pump system, further reducing oil use and adding air conditioning — something they hadn't had before.
As an Efficiency Maine registered vendor, we handle all the paperwork. Topsham homeowners qualify for the same rebates as every Maine resident.
