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0083 Ice Damming at Skylight - Roofing - Skylights
0083 Ice Damming at Skylight - Roofing - Skylights -

Image Text: Cross section > skylight > snow > heat loss > water entry > water buildup > ice dam > snow > roof rafter > ceiling joist > exterior wall > localized heat loss causes snow to melt around the skylight upon hitting the colder roof below the skylight, the water refreezes - building up a dam > water subsequently running down the roof can back up under the shingles or skylight

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Image courtesy of Carson Dunlop. To purchase images, go to CarsonDunlop

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