Method of making a building material having a selvage edge

摘要

A method of forming a building material with a pre-applied adhesive, the method comprising the steps of manipulating a first membrane and a second membrane to be spaced from one another along parallel adjacent edges to form a gap; securing a single strip of adhesive tape to a top surface of both said first and second membranes adjacent to said adjacent edges so that said adhesive tape extends over said gap; and cutting along the length of said adhesive tape to form a first adhesive tape and a second adhesive tape, said first adhesive tape being secured to the top surface of said first membrane and extending over a portion of said gap, and said second adhesive tape being secured to the top surface of said second membrane and extending over a portion of said gap.