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NYC Building Code

§ 2509.3 — § 2509.3

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What is NYC BC § 2509.3?

Quick Answer

This section outlines limitations on the use of water-resistant gypsum backing board in specific locations, including over vapor retarders in shower or bathtub compartments and in areas with direct water exposure or continuous high humidity. Applies to building owners involved in construction and renovation projects.

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

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2509.3 Limitations.

BC § 2509.3

Water-resistant gypsum backing board shall not be used in the following locations: 1. Over a vapor retarder in shower or bathtub compartments.

2.Where there will be direct exposure to water or in areas subject to continuous high humidity.

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