One of the oldest application methods still used today, involves melting blocks of asphalt in a large kettle and spreading the melted asphalt on the roof with mops.
Heat Welding/Torch Applied
Using a torch, the installer will melt the asphalt on the underside of the membrane. This will allow the sheet to adhere to the substrate below.
The installer attach the roofing membrane by applying a liquid adhesive (i.e., Matrix 101) with a tool such as a notched squeegee or an applicator gun to the substrate or previously applied layer of roofing material.
This fast growing asphaltic installation method involves rolling out a membrane and peeling the film backing to adhere the membrane. This method can increase the speed of installation over the other three methods and does not produce unpleasant odors.