If you live in Port Washington, Sands Point, or anywhere along the North Shore of Long Island, you already know the deal: saltwater air, harsh winters, pollen season, and summer humidity do a number on your home's exterior. What looks fine from inside can look grimy and weathered from the curb, and if you're on the water, it happens even faster.

Here's a practical guide to how often locals should be cleaning their windows and power washing their driveways, siding, and patios, and why getting on a schedule pays off.