head lap

Isaac Kremer/ November 23, 2025/ / 0 comments

The overlap of a roofing material, like a slate tile or shingle, on the course two rows below it, creating a watertight seal by preventing water from getting underneath. It is the distance from the upper edge of a lower course to the exposed surface of the next course up, and the correct head lap is crucial for weatherproofing the roof. The required head lap varies based on the roof’s slope, with lower slopes needing a greater overlap. (Kremer, 2025)

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About Isaac Kremer

Isaac is a nationally acclaimed downtown revitalization leader, speaker, and author. Districts Isaac managed have achieved over $1 billion of investment, more than 1,899 jobs created, and were 2X Great American Main Street Award Semifinalists and a 1X GAMSA winner in 2023. His work has been featured in Newsday, NJBIZ, ROI-NJ, Patch, TapInto, and USA Today. Isaac is a Main Street America Revitalization Professional (MSARP), with additional certifications from the International Economic Development Council, National Park Service, Project for Public Spaces, Grow America (formerly the National Development Council), and the Strategic Doing Institute.

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