Last updated: October 2026

Delaware's coastal humidity and nor'easters push wind-driven rain into every joint and seam — flashing and caulk condition matter as much as the panels themselves. Across the 8 Delaware cities we track, an average of 40.9% of homes were built before 1980 (U.S. Census Bureau, ACS 2020–2024) with average annual rainfall of 45.1 in/yr (NOAA 1991–2020 normals).

City-by-city guides

• Siding in Bear, DE — pop. 22,370
• Siding in Dover, DE — pop. 39,837
• Siding in Hockessin, DE — pop. 13,439
• Siding in Middletown, DE — pop. 24,661
• Siding in Milford, DE — pop. 12,803
• Siding in Newark, DE — pop. 30,330
• Siding in Smyrna, DE — pop. 13,165
• Siding in Wilmington, DE — pop. 71,727

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.