
Window Replacement in Long Island, Maine
Window Replacement for Long Island homes from a family-owned Portland company. An owner measures on site and writes a fixed-price proposal.
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Window Replacement for Long Island homes
With most of the island's houses built before 1940, original single-pane wood sash is still common, along with aluminum storms and first-generation replacement units whose seals have failed. Summer cottages that were never meant for winter often have the loosest windows of all, and the comprehensive plan counts the island's many unheated or poorly heated summer homes among the reasons they rarely become year-round housing. Houses built before 1978 may contain lead paint, and federal EPA work-practice rules apply when it is disturbed during window removal.
Replacement choices include vinyl replacement windows for simpler cottages and wood or clad units from Andersen, Marvin, Pella and Integrity where divided lights and exterior trim matter. Double-hungs match most of the older houses; casements and awnings seal tighter against wind on exposed walls. Because anything that arrives the wrong size cannot simply be swapped the next day, the estimate is an on-site measurement and a written fixed-price proposal. For owners converting a seasonal cottage to year-round use, tighter, insulated windows are one of the first steps toward a house that can be heated.

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

Long Island housing at a glance
Census estimates count about 423 housing units, and the median year built is 1938. About 66 percent of units predate 1940, and about 68 percent predate 1960. Almost nothing was built between 1960 and 1979, only around 3 percent, and about 15 percent went up in 2000 or later. Roughly 95 percent of units are single-family detached houses, and about 88 percent of year-round households own their home. Seasonal use dominates: about 307 units, nearly three-quarters of the stock, are held for seasonal or occasional use. The town's comprehensive plan counts about 50 homes converted from year-round to summer-only use over a recent 25-year stretch and describes many summer houses as unheated or poorly heated. Many trace back to the summer-cottage boom of the 1890s and 1900s.
Long Island neighborhoods and architecture
Summer steamboats turned Long Island into a resort in the 1890s, with hotels such as the Granite Spring, the Dirigo House and the Mountfort Inn and summer cottages built by rusticators. A 1914 fire destroyed the Granite Spring Hotel, Ponce's wharf and most of the business district. During World War II the Navy built a fuel annex in the island's center, and nearly 90 homes and cottages were destroyed or moved to make room. Much of that land is now town conservation property. The comprehensive plan notes no National Register listings, but the island keeps the remains of Civil War veterans' retreats and a beach whose sand sings underfoot.
Permits and design review in Long Island
The Code Enforcement Officer meets by appointment through the Town Clerk. The town's building permit application covers new structures, additions, alterations, replacements and repairs, and it must include a scaled site plan and proof that a construction debris container has been delivered to be barged off the island. Every job gets at least three inspections: foundation, framing and final. Height is capped at 35 feet, and several zones limit structures to 15 percent of the lot. In the shoreland zone, new structures sit at least 75 feet from the upland edge of a coastal wetland, and the permit form warns that shoreland work may also need a Maine DEP permit.
Long Island at a Glance
What the housing stock and local code enforcement mean for a siding, window, roofing or deck job here.
249
Population (ACS estimate)
Median year built: 1938
Original wood clapboard or shingle siding, wood-sash windows and multi-layered roofs are common here.
State Building & Energy Code (MUBEC)
Local option — population under 4,000
EPA Lead-Safe Rule (pre-1978 homes)
Applies to at least 68% of homes here
Shoreland Zoning
Applies, plus island delivery logistics
Permits
Town of Long Island Code Enforcement Officer (CEO business handled by appointment; contact via Town Clerk)
Codes & Permits for Window Replacement in Long Island
In Long Island, exterior-work permits come from the Town of Long Island Code Enforcement Officer (CEO business handled by appointment; contact via Town Clerk). Long Island sits at or under the 4,000-resident line where MUBEC enforcement is a local option rather than a state mandate.
- For a bedroom window replacement, IRC R310 egress dimensions (minimum 5.7 sq ft net clear opening, 5.0 sq ft at grade, 20-inch minimum width, 24-inch minimum height, 44-inch maximum sill height) are the standard the opening must meet if the code treats the work as requiring egress compliance; the exact current Maine-adopted IRC text for R310 (including any replacement-window exception) could not be directly retrieved this session, so contractors should confirm the current exception language with the local code office before assuming an existing non-conforming bedroom opening is exempt. up.codes
- Maine's adopted 2021 IECC places all of Maine (including Cumberland County) in Climate Zone 6A, with a maximum fenestration U-factor of 0.30 for replacement windows/doors under Table N1102.1.2. up.codes
- Whether a straightforward like-for-like window replacement (no structural/opening change) requires a town building permit varies by municipality in Maine — some code offices treat it as permit-exempt maintenance, others require a permit specifically to verify egress and U-factor compliance; this should be confirmed per-town rather than assumed. maine.gov
- 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 Window Replacement in Long Island
- Maine's adopted energy code places Long Island in Climate Zone 6A, capping the U-factor on replacement windows at 0.30 — every unit we quote for a window replacement job here meets that number or beats it.
- With 68% of Long Island's housing built before 1960, a real share of that stock predates 1978 as well, which means EPA lead-safe containment is part of window replacement on an older Long Island home more often than not.
- Long Island, at 249 residents, sits under the population line where MUBEC enforcement is a state requirement — the town may still choose to enforce it locally, and the permit process applies regardless.
- Materials and debris containers travel by private barge, plus the Casco Bay Lines passenger ferry from Portland. That logistics window shapes when we can start and finish the job.
- We file for window replacement permits at the Town of Long Island Code Enforcement Officer (CEO business handled by appointment; contact via Town Clerk) before work starts, not after.
The Casco Bay Lines ferry terminal on Commercial Street in Portland — the mainland gateway used to reach Long Island, which has no Google Street View car coverage of its own.
Street View © Google
What window replacement involves
A new window is only as good as the way it is set into the wall. Replacement windows go in either as inserts inside the existing frame or as full-frame units after the old frame comes out; the right choice depends on the condition of the frame, the trim you want to keep, and the siding around it. The site lists vinyl replacement windows and wood or clad units from Andersen, Marvin, Pella and Integrity, in double-hung, casement, picture, bay, sliding and awning styles.
- Each opening is measured and checked for rot in the sill, jambs and framing.
- Old sashes or whole frames come out; damaged wood is repaired before the new unit goes in.
- Units are set level, plumb and square, shimmed, and fastened as the manufacturer requires.
- Low-expansion foam and backer rod seal the gap without bowing the frame.
- Flashing, exterior trim or capping and interior casing are finished so the opening sheds water.
Signs it is time
- Fog or condensation between the panes of insulated glass
- Sashes that stick, will not stay up, or let in drafts
- Soft or rotted sills and frames
- Single-pane glass or storm windows you take on and off every year
- Frost or ice on the inside of the glass in winter
What affects the price of window replacement
- Number of windows, their sizes, and any custom shapes
- Vinyl versus wood or clad units, and the brand and series
- Insert versus full-frame replacement
- Glass package and grille options
- Interior and exterior trim work, and whether siding is open around the opening
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 window replacement overview.
For a deeper walkthrough of materials, code details and photos, see our full Window Replacement: U-Factor, ENERGY STAR, and Full-Frame vs. Insert in Maine guide.
More in Long Island and nearby
Back to the Long Island exterior services overview, or see every town on our service areas page.
Other exterior work in Long Island
- Bay & Picture Windows in Long Island
- Roof Replacement in Long Island
- Asphalt Shingle Roofing in Long Island
- Metal Roofing in Long Island
- Deck Building in Long Island
- Composite & PVC Decks in Long Island
- Deck Replacement in Long Island
- Siding Replacement in Long Island
- Vinyl Siding Installation in Long Island
- James Hardie Fiber Cement Siding in Long Island
- Cedar Siding & Shingles in Long Island
Get a free window replacement estimate in Long Island
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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