
Bay & Picture Windows in Windham, Maine
Bay & Picture Windows for Windham homes from a family-owned Portland company. An owner measures on site and writes a fixed-price proposal.
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Bay & Picture Windows for Windham homes
Big glass earns its place on Windham's lake lots. A living room facing Sebago Lake near Jordan Bay, a cove on Little Sebago or the open side of Highland Lake gets the most from a large picture window, often flanked by casements for air. Homes set back on the wooded hills and fields around Windham Center use bay and bow windows to pull light into rooms shaded by trees.
Large units have to be sized and installed for the site. A picture window facing open water takes more wind pressure than glass in a sheltered subdivision, so frame strength, glass thickness and anchoring should match the exposure. A projecting bay has a small roof of its own that collects snow and ice all winter; with around 69 inches of snow a year at the nearest long-record station, that roof needs solid framing, proper flashing where it meets the wall, and an ice barrier so meltwater does not leak inside. West-facing glass over Sebago catches hot late-day sun in summer, so coatings chosen for that orientation keep rooms comfortable.

How a Window Rough Opening Gets Flashed
- Sill pan — sloped, with dammed ends, so any water that gets past the window drains out, not into the wall
- Window unit — set directly on the sill pan before the sides are fastened
- Jamb flashing tape — laps over the sill pan on both sides, in the order water will travel
- Head flashing — tucks under the weather-resistive barrier above the opening
- Drainage — every layer sheds down and out, never behind the one below it

Windham housing at a glance
Census estimates count about 8,700 housing units in Windham, with a median year built of 1985. Roughly 27 percent of homes were built in 2000 or later, and about 21 percent between 1960 and 1979, while only about 12 percent predate 1940. About 85 percent of occupied homes are owner-occupied and roughly 79 percent of units are single-family detached. Around 780 units are held for seasonal use. The town's 2017 comprehensive plan notes that many once-seasonal camps around the lakes are now lived in year-round, still reached by old gravel roads built for summer use. It also records that Windham's population held near 2,000 from 1830 to 1940, so most of today's houses belong to the decades of growth that followed.
Windham neighborhoods and architecture
Windham began as New Marblehead, granted in 1734 and incorporated as Windham in 1762. Its villages carry that history. South Windham grew with the mills at Little Falls on the Presumpscot, shared with Gorham across the river. Windham Center and Windham Hill line the old stage road to the lakes, where the Windham Hill Congregational Church dates from 1835. Great Falls keeps period homes along Great Falls Road and is a National Register historic district, and Popeville holds the Quaker Friends Meeting House. North Windham, on Route 302 between Jordan Bay and Little Sebago Lake, is the town's commercial center.
Permits and design review in Windham
Windham's Code Enforcement department, at 8 School Road, administers the town's land use, building, plumbing and electrical codes, and permits are applied for through the town's online portal. Decks are structural work, so check permit needs there before building one. Properties within 250 feet of Sebago Lake, Little Sebago, Highland Lake, the Presumpscot or the Pleasant River fall under shoreland zoning, which the town administers and which limits building near the water. Windham adopted a historic preservation ordinance in 1989, but its 2017 plan says no local historic district boundaries were ever put in place.
Windham at a Glance
What the housing stock and local code enforcement mean for a siding, window, roofing or deck job here.
18,434
Population (ACS estimate)
Median year built: 1985
Mostly vinyl or fiber-cement siding and insulated replacement windows from recent decades.
State Building & Energy Code (MUBEC)
Enforced — population over 4,000
EPA Lead-Safe Rule (pre-1978 homes)
Applies to at least 21% of homes here
Shoreland Zoning
Applies near the water
Permits
Windham Code Enforcement Department
Codes & Permits for Bay & Picture Windows in Windham
In Windham, exterior-work permits come from the Windham Code Enforcement Department (8 School Road, Windham, ME 04062, 207-894-5960 ext. 1). With 18,434 residents, over 4,000, Windham is required to enforce the Maine Uniform Building and Energy Code (MUBEC).
- A fixed picture window does not itself satisfy IRC R310 egress for a bedroom; if a bay/picture window is installed in a sleeping room, the room still needs a separate code-compliant egress window or door meeting the R310 opening/sill dimensions elsewhere in the room. up.codes
- Bay windows project beyond the wall plane and typically require additional structural support (headers sized per the applicable IRC span tables, and often a knee-wall or bracket support system) beyond what a standard flat-wall window opening needs — sizing should follow the IRC's header/span-table provisions and, for the bay's roof/floor cantilever, engineered or manufacturer-specified support rather than a simple in-wall header swap. up.codes
- The same Climate Zone 6A / U-factor 0.30 fenestration requirement applies to bay and picture window units as to standard replacement windows under Maine's adopted 2021 IECC. up.codes
- Maine's Shoreland Zoning Act creates a regulated shoreland zone extending 250 feet (horizontal distance) from the normal high-water line of any great pond, river, or coastal wetland, and 75 feet from certain streams; the Act's stated purposes include protecting buildings and land from flooding/erosion and controlling water pollution, and it governs deck and other structure setbacks and the expansion of nonconforming structures within that zone (specific setback/expansion rules are set at the municipal-ordinance level under the state's model guidelines). maine.gov
How Cardinal Exteriors Handles Bay & Picture Windows in Windham
- Whatever we install for a bay and picture windows job in Windham is rated to Climate Zone 6A's 0.30 maximum U-factor, the energy-code ceiling Maine adopted statewide.
- At least 21% of Windham's homes predate 1960 — well ahead of 1978, when the EPA's lead-safe renovation rule kicks in — so we plan for lead-safe work practices on bay and picture windows whenever painted surfaces come off an older house here.
- With 18,434 residents, Windham is over Maine's 4,000-resident line, so the town enforces the statewide Uniform Building and Energy Code (MUBEC) on top of its own permit process.
- We file for bay and picture windows permits at the Windham Code Enforcement Department before work starts, not after.
A farmhouse-style home along Hillcrest Road in Windham.
Street View © Google
What bay and picture windows involves
Picture windows are large fixed units that frame a view and pour light into a room. Bay and bow windows project out from the wall, adding floor space and light from three or more directions. Both are heavier and more exposed than an ordinary window, so the structure, support, roof and flashing around them matter. The Cumberland Center colonial on this site received Andersen 400 Series bay, double-hung and picture windows.
- The opening, header and framing are checked; widening an opening may need a new header.
- Bay and bow units are supported with cables, brackets or a framed seat so they do not sag.
- The small roof over a bay is flashed into the wall and roofed or capped to match the house.
- Insulation goes into the seat and head so the projection is not a cold spot.
- Interior seat boards, casing and exterior trim are finished to match.
Signs it is time
- A view you want to see more of from the main living space
- An old bay that sags, leaks at the roof, or feels cold at the seat
- Fogged glass in a large fixed unit
- A dark room that needs more daylight
What affects the price of bay and picture windows
- Size and configuration: picture, bay or bow, number of units
- Whether the rough opening changes size
- Support method and seat or roof finish
- Glass package and brand
- Interior finish carpentry
Every job is priced from a free on-site visit. Typical ranges for the trade are on our window replacement page, and the details of this service are on the bay and picture windows overview.
For a deeper walkthrough of materials, code details and photos, see our full Bay & Picture Windows: The Structural Support Most Homeowners Never See guide.
More in Windham and nearby
Back to the Windham exterior services overview, or see every town on our service areas page.
Other exterior work in Windham
- Roof Replacement in Windham
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- Metal Roofing in Windham
- Deck Building in Windham
- Composite & PVC Decks in Windham
- Deck Replacement in Windham
- Siding Replacement in Windham
- Vinyl Siding Installation in Windham
- James Hardie Fiber Cement Siding in Windham
- Cedar Siding & Shingles in Windham
- Window Replacement in Windham
Get a free bay and picture windows estimate in Windham
Tell us about the house and what you want changed. One of the owners will call to set up a visit, measure, and write a fixed-price proposal. No pressure, no obligation.
Need it today?Call Mike (207) 408-5388
or Bob at (207) 252-0759
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