Understanding Flat Roof Ponding Water: When Standing Water Becomes a Problem
Water standing on flat roof >48 hours indicates inadequate drainage slope (should be 1/4-inch per foot minimum). Ponding degrades roofing membrane, promotes algae/moss, and adds structural load. Fix options: tapered insulation, additional roof drains, or crickets between drains.
Your roof is your home's first line of defense against the elements. Making informed decisions about roofing materials, maintenance, and when to repair vs replace can save you tens of thousands of dollars over your homeownership journey.
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