ASTM C1178 / C1178M - 11 standard specification for coated glass mat water-resistant gypsum backing panel

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Source: ASTM International

This specification covers coated glass mat water-resistant gypsum backing panel designed for use on ceilings and walls in bath and shower areas as a base for the application of ceramic or plastic tile. Coated glass mat water-resistant gypsum backing panel shall consist of a noncombustible water-resistant gypsum core, surfaced with glass mat, partially or completely embedded in the core, and with a water-resistant coating on one surface. The specimens shall be tested for flexural strength, humidified deflection, core hardness, end hardness, edge hardness, nail pull resistance, water resistance, and surface water absorption. Coated glass mat water-resistant gypsum backing panel shall have surfaces true and free of imperfections that render the panel unfit for its designed use.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers coated glass mat water-resistant gypsum backing panel designed for use on ceilings and walls in bath and shower areas as a base for the application of ceramic or plastic tile.

1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Within the text, the SI units are shown in brackets.

1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

2. Referenced Documents (purchase separately)

ASTM Standards
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C473 Test Methods for Physical Testing of Gypsum Panel Products
C645 Specification for Nonstructural Steel Framing Members
C1264 Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage of Gypsum Panel Products
E119 Test Methods for Fire Tests of Building Construction and Materials

Index Terms

bath; ceilings; ceramic or plastic tile; construction; core; end and edge hardness; fire-resistant; flexural strength; glass mat; gypsum; humidified deflection; immersion; nail pull resistance; shower; surface water absorption; type X; walls; water absorption; water resistance; water-resistant: Bathrooms; Ceilings; Glass mat gypsum board; Gypsum products--specifications; Humidified deflection; Nail pull resistance; Showers/showering areas; Surface water absorption; Wall construction--specifications; Water-resistant gypsum board--specifications;

ICS Code

ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)

DOI: 10.1520/C1178_C1178M-11

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