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NYC Building Code

§ 1504.6 — § 1504.6

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What is NYC BC § 1504.6?

Quick Answer

This section outlines the requirements for roof coverings installed on low-slope roofs, mandating that they demonstrate physical integrity through accelerated weathering tests. It specifies that unreinforced membranes must not lose significant tensile strength, and reinforced membranes must maintain breaking strength under wind load conditions. Applies to building owners responsible for roof installations.

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

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1504.6 Physical properties.

BC § 1504.6

Roof coverings installed on low-slope roofs (roof slope < 2:12) in accordance with Section 1507 shall demonstrate physical integrity over the working life of the roof based upon 2,000 hours of exposure to accelerated weathering tests conducted in accordance with ASTM G 152, ASTM G 155 or ASTM G 154. Those roof coverings that are subject to cyclical flexural response due to wind loads shall not demonstrate any significant loss of tensile strength for unreinforced membranes or breaking strength for reinforced membranes when tested as herein required.

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