CPC E04F 15/203 (2013.01) [E04B 1/82 (2013.01); E04B 1/86 (2013.01); E04F 15/182 (2013.01); E04B 1/942 (2013.01)] | 22 Claims |
1. A flooring system having a hybrid underlayment, the flooring system comprising:
a plurality of isolation boards adhered to a subfloor in a targeted area, the targeted area lying within a first portion of the subfloor adjacent to a wall;
a cementitious product poured in a second portion of the subfloor so that the poured cementitious product is level with a top side of the plurality of isolation boards, the plurality of isolation boards defining a pour stop for the cementitious product; and
a sealant applied on top of the poured cementitious product such that the sealant covers intersection locations between the poured cementitious product and the plurality of isolation boards;
wherein the plurality of isolation boards is comprised of water-resistant isolation boards, fire-rated cellulose fiberboards or combinations thereof.
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