Patent ID: 8151538

Claim:
A method of making a weather-resistive barrier on a building under construction that employs adjacent sheets of wood, cement or gypsum exterior sheathing on a structural frame with gaps between the sheets, comprising: (a) applying a foamed composition comprising one or more aqueous emulsion polymer to the gaps wherein the composition comprises an aqueous emulsion polymer with a Tg less than 25° C., a surfactant, water and a blowing agent wherein a wet, freshly applied 12 mm thick and 50 mm wide bead of the foamed composition has the ability when dried to be compressed to a thickness of not more than 3 mm under a stress of no more than 0.035 MPa; and (b) applying an aqueous polymeric coating over the sheathing and the foamed composition wherein the polymeric coating has a density when dried of greater than 0.7 g/ml.