Method of bonding roof tiles to roof substrate utilizing urethane foam

摘要

A method of bonding a roof tile to a roof substrate utilizing a two component polyurethane foam. The method includes the step of applying under low pressure a stream of a two component foamable liquid polyurethane on a roof substrate. Preferably, the foamable liquid polyurethane has a density in the range of about one and one-half to about two pounds per cubic foot and a reactivity period in the range of about one and one-half to about four minutes. Preferably, the foamable liquid polyurethane is applied at a rate of about two to about three pounds per minute. The roof tile is placed into contact with the foamable liquid polyurethane during the reactivity period of the foamable liquid polyurethane.