Last updated: October 2026

Maine winters are hard on siding: deep freeze-thaw cycling, ice, and coastal salt air all shorten the life of finishes and caulk joints. Across the 8 Maine cities we track, an average of 60.6% of homes were built before 1980 (U.S. Census Bureau, ACS 2020–2024) with average annual rainfall of 47.4 in/yr (NOAA 1991–2020 normals).

City-by-city guides

• Siding in Biddeford, ME — pop. 22,498
• Siding in Brunswick, ME — pop. 17,652
• Siding in Portland, ME — pop. 68,854
• Siding in Saco, ME — pop. 20,819
• Siding in Sanford, ME — pop. 22,247
• Siding in South Portland, ME — pop. 26,930
• Siding in Westbrook, ME — pop. 20,775
• Siding in York Beach, ME — pop. data pending

How to use these guides

Each city page pairs siding how-it-works guidance — warning signs, the inspection process, materials, repair vs. replace — with that city's real housing-age and rainfall data, so you can see which pattern dominates locally. When you talk to contractors, ask how their plan accounts for the local weather, and whether they probed for rot before quoting a scope.