scope:

This specification covers deck covering underlay materials to smooth the surfaces of steel decks before applying deck covering materials.

Deck covering underlay materials shall be of the following types, as specified (see 6.2.1):

Type I - For use under ceramic tile, terrazzo, and other mastic deck covering materials. Class 1 - Latex base underlay materials for use under ceramic tile, latex or resin emulsion terrazzo or latex mastic deck covering materials. Class 2 - Resin base underlay materials for use under resin terrazzo, or polymeric deck covering materials. Type II - Latex base underlay for use under linoleum and plastic tile, deck tile, and other similar preformed deck covering materials.

intended Use: