Roof Replacement in Casco, Maine

Census estimates count about 2,970 housing units in Casco, with a median year built of 1988, noticeably newer than Raymond's 1976. Only about 5 percent predate 1940 and around 18 percent predate 1960, while roughly 31 percent have gone up since 2000. About 76 percent are single-family detached homes, a lower share than in neighboring Raymond, and about 90 percent of occupied homes are owned by the people living in them. Seasonal use is large: roughly 1,210 units, about four in ten, are held for seasonal or recreational occupancy, from shoreline cottages to second homes. The town also runs a short-term rental registration ordinance, since many lake houses are rented by the week. The older layer is small but real, including a Federal-style house from about 1795 in South Casco.

Casco is inland, so the weather that wears on houses here is snow, cold and the wind off big water, not salt. Published normals from the National Weather Service office in nearby Gray show about 84 inches of snow a year for 1991-2020, well above the roughly 69 inches at the Portland Jetport. Deep cold and midwinter thaws alternate from December into March. Cottages on the north shore of Sebago Lake face miles of open water to the south, and Sebago rarely freezes over completely, so that exposure lasts through the winter. Houses on Pleasant Lake, Thomas Pond and the smaller ponds sit among tall pines, where shade and needle litter keep roofs and decks damp.

Casco's Code Enforcement Department, which the town calls its building department, works from the town office at 635 Meadow Road and meets by appointment. Since April 7, 2025 the town enforces the 2021 I-codes under Maine's uniform building code. The building permit application asks whether a lot is in shoreland, water body, wetland or resource protection zoning, wants a plot plan with roadside and lakeside setbacks, and records lot coverage. Permits are valid for one year. Work in the shoreland zone, within 250 feet of a great pond, uses a separate Shoreland Project Permit Application with photos before and after construction.

A roof replacement strips the old roofing down to the deck, repairs what is underneath, and rebuilds the whole system: underlayment, ice and water protection at the eaves and valleys, flashing at chimneys and walls, ventilation, and the new roofing itself. Maine roofs carry snow for months and see ice dams at the eaves, so the parts you never see do most of the work. The site covers architectural asphalt shingles, metal, cedar shake and flat or low-slope roofing.

• Old roofing is torn off to the deck and hauled away, with the yard and plantings protected.
• Soft or delaminated sheathing is replaced before anything new goes down.
• Ice and water shield goes at the eaves, valleys and penetrations; synthetic underlayment covers the rest.
• Drip edge, step and counter flashing, and pipe boots are installed new.
• Ridge and soffit venting are balanced, then the new roofing is installed and the site cleaned with magnets.

• Curling, cracked, or missing shingles and granules in the gutters
• Ice dams along the eaves or water stains on ceilings after thaws
• Daylight or damp sheathing visible in the attic
• Sagging roof lines or spongy spots underfoot
• A roof at or past the age its material was made for

• Roof area, pitch and complexity: valleys, dormers, skylights, chimneys
• Number of existing layers to remove
• Sheathing repair found after tear-off
• Material: asphalt, metal, cedar or low-slope membrane
• Ventilation and flashing upgrades

Every job is priced from a free on-site visit. Typical ranges for the trade are on our roofing page, and the details of this service are on the roof replacement overview.

For a deeper walkthrough of materials, code details and photos, see our full Roof Replacement in Maine: Ice Dams, Ventilation, and What's Under the Shingles guide.

Back to the Casco exterior services overview, or see every town on our service areas page.