Patent ID: 8112966

Claim:
A method of making a weather-resistive barrier on a building that employs adjacent sheets of wood, cement or gypsum exterior sheathing on a structural frame with joints between the sheets, comprising: (a) applying a polymeric coating composition on a plurality of sheathing sheets before installation on the building wherein the polymeric coating has a density when dried of greater than 0.7 g/ml; (b) installing a plurality of the coated sheathing sheets on the building so that sheets are adjacent one another with joints between adjacent sheets; and (c) applying a foamed aqueous emulsion polymer composition to at least some of the joints wherein the composition comprises an aqueous emulsion polymer with a Tg less than 25° C., a surfactant, and a blowing agent, and wherein the foamed aqueous emulsion polymer composition has a compressibility factor of not more than 3.