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NYC Building Code

§ 2509.2 — § 2509.2

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What is NYC BC § 2509.2?

Quick Answer

This section outlines the materials permitted as a base for wall tile in tub and shower areas, specifying water-resistant gypsum backing board for certain applications and listing acceptable materials in Table 2509.2. Applies to building owners involved in construction or renovation of bathroom areas.

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

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2509.2 Base for tile.

BC § 2509.2

Materials used as a base for wall tile in tub and shower areas and wall and ceiling panels in shower areas shall be of materials listed in Table 2509.2 and installed in accordance with the manufacturer's recommendations. Water-resistant gypsum backing board shall be used as a base for tile in water closet compartment walls when installed in accordance with GA-216 or ASTM C 840 and the manufacturer's recommendations. Regular gypsum wallboard is permitted under tile or wall panels in other wall and ceiling areas when installed in accordance with GA-216 or ASTM C 840. Table 2509.2Backerboard Materials Material Standard Glass mat water-resistant gypsum backing panelASTM C 1178Discrete nonasbestos fiber cement interior substrate sheetsASTM C 1288Nonasbestos fiber cement flat sheetsISO 8336, Category CNonasbestos fiber-mat reinforced cementitious backer unitASTM C 1325

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