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NYC Building Code

§ 1507.7.7 — § 1507.7.7

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What is NYC BC § 1507.7.7?

Quick Answer

This section outlines the requirements for flashing and counterflashing using sheet metal, specifying dimensions and materials. It mandates that valley flashing be at least 15 inches wide and details the construction of cap flashing for chimneys and walls. Applies to building owners involved in construction or renovation projects.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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1507.7.7 Flashing.

BC § 1507.7.7

Flashing and counterflashing shall be made with sheet metal. Valley flashing shall be a minimum of 15 inches (381 mm) wide. Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.455 mm) zinc-coated G90. Chimneys, stucco or brick walls shall have a minimum of two plies of felt for a cap flashing consisting of a 4-inch (101.6 mm) wide strip of felt set in plastic cement and extending 1 inch (25.4 mm) above the first felt and a top coating of plastic cement. The felt shall extend over the base flashing 2 inches (50.8 mm).

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