Insulation in Shapleigh, Maine

Insulation and air sealing in Shapleigh

Shapleigh runs to about 39 square miles and roughly 2,976 people. It sits about 30 miles west of downtown Portland. Around 2,060 housing units sit inside those boundaries. The community dates back to 1785. We cover ZIP code 04076.

No completed job in Shapleigh is logged in our records yet, and this page will say so until one is.

The housing stock in Shapleigh

The typical home in Shapleigh dates to around the early-1980s. Houses of this vintage usually got batts or blown fiber at whatever the standard of the day was, which is well short of what is recommended now. Most are one top-up away from being right.

We work across Shapleigh rather than one corner of it — Shapleigh Corner, North Shapleigh, Ross Corner, Emery Mills, Mousam Lake and Square Pond included. Construction and vintage change between them, sometimes by thirty years and a whole different framing method, which decides whether a wall can be dense-packed at all.

Shapleigh is a lake town that includes Mousam Lake, Square Pond and a number of smaller ponds, with villages at Shapleigh Corner, North Shapleigh, Ross Corner and Emery Mills. It was one of the Maine towns devastated by the Great Fires of 1947, and its western half became the town of Acton in 1830.

Shapleigh homes in the Census numbers

The Census Bureau estimates 2,060 homes in Shapleigh. 217 of them (11%) went up before 1940 — 53rd of 64 places on this site for pre-1940 housing. The 1990s were the busiest decade, adding 333 of today's homes (16%); 51% predate 1980 and 26% were built in 2000 or later. For York County as a whole the pre-1940 share is 20%, so Shapleigh sits below it.

Of 1,136 occupied homes, 1% heat with utility gas and 12% with electricity; another 19% burn propane or other tank gas. Electric heat here is more common than across the county (10%), and ranks 22nd of 64 on this site. Efficiency Maine's insulation rebates do not depend on the fuel or the utility, but the fuel decides what the work saves, so the assessment asks how the house is heated.

95% of occupied homes are owner-occupied and 96% of all homes are single-family detached houses, with 58 mobile homes in the count. With houses like these, the conversations we expect most are about the attic, which is where most houses here start.

2,060 homes, Census ACS 2020–2024 (B25034, B25040, B25003); 1,136 occupied.

Sealing comes first in Shapleigh

474 of Shapleigh's 2,060 homes (23%) were built in the 1980s and 1990s. The gaps in houses of that age are the parts nobody sealed: batts stuffed into the rim joist, bare spots over cathedral and tray ceilings, soffit vents buried with no baffles, can lights punched through the ceiling plane. A top-up plus a day of sealing usually covers it.

What the energy code requires in Shapleigh

Shapleigh enforces the Maine Uniform Building and Energy Code (2021 IECC with Maine amendments). Shapleigh's March 10, 2012 town meeting adopted the state code as Chapter 7 of the town code; with 2,921 residents it is not required to enforce it, and does.

For new work, the attic number under that edition is R-60, with walls at R-30, or R-20 + R-10 continuous, or R-13 + R-15 continuous, or R-20 continuous. Set that against the Department of Energy, which recommends R60 for an uninsulated attic in this climate zone and R49 for one that already has a few inches.

The 2021 IECC, Table R402.1.3, zone 6, as amended by Maine's energy rule, 08-003 C.M.R.

Do you need a permit to insulate here?

Nothing Shapleigh publishes settles this. Its permit lists name the work types it cares about, and insulation is not among them in either direction. Shapleigh's code pages and zoning ordinance do not say whether insulation needs a permit; residential permits are $8 per $1,000 of value. So we ask the department directly before the first day on site, and whatever comes back, pulling it is our job rather than yours.

Permits and inspections in Shapleigh

The published number is 207-636-2844. The department page is here.

Permitting is on us, not on you.

Rebates a Shapleigh homeowner can actually use

Heating fuel in Shapleigh, by the Census Bureau's count: fuel oil or kerosene in 57% of occupied homes, electricity in 12%, propane or tank gas in 19% (Census ACS 2020–2024). For Shapleigh homeowners the rebate is Efficiency Maine's: $2,000 for each attic, wall or basement zone of 500 square feet or more at any income ($3,000 moderate, $4,000 low income), with $150 to $300 for attic air sealing on top. The work has to be done by an Efficiency Maine Residential Registered Vendor, and the attic has to start at R-21 or below and finish at R-49 or more. Income-qualified households in York County can apply to York County Community Action Corp (207-324-5762) for free weatherization through MaineHousing instead. Every condition is in the rebate guide. The York County page compares the towns.

Nearby

Shapleigh borders Acton, Waterboro, Alfred, Newfield and Sanford. These are the ones we also cover, each with its own energy code and permit rule:

Elsewhere in York County we also cover:

How Shapleigh compares with its neighbors

Maine sets the residential energy code statewide, so the attic figure is R-60 wherever it is published here; what changes is the permit desk, and none of the 7 publishes a permit rule for insulation.

All 29 York County jurisdictions side by side →

Common questions about insulation in Shapleigh

Code and permit facts checked October 24, 2026, rebates October 24, 2026; housing: Census ACS 2020–2024. Sources: shapleigh.net (2, 3, 4) · ecode360.com (2, 3) · maine.gov (2) · legislature.maine.gov · www2.census.gov (2, 3) · en.wikipedia.org · prd-tnm.s3.amazonaws.com · efficiencymaine.com (2, 3, 4) · energystar.gov · data.census.gov. These change; confirm with the building department at 207-636-2844 or Efficiency Maine at 866-376-2463 first.