The APP modified asphalt is reinforced with a polyester mat and manufactured into a roll product. These membranes have extra asphalt on the back side which allows it to bond to the substrate through applications such as heat welded or torch applied methods.
Torch Applied – The APP modified membrane is applied to your building with an open flame torch to melt the bottom side of the sheet as it is being applied.
Heat Welding – A welder is used to blow out hot air which then fuses the back side of the membrane to the substrate. This method is a safer alternative than torch applied, as it is less of a fire hazard.
Hot Asphalt application – Hot Asphalt is applied to the felts or substrate with the use of a machine, while it can also be physically mopped down. The membrane is then laid over the hot asphalt. The hot asphalt acts as the adhesive and allows the membrane to bond to the substrate.
Cold Adhesive – The modified membrane is set in a cold process using specially formulated asphalt based adhesives as it is being applied.
Self Adhered – The bottom surface of the membrane is covered with an adhesive and release paper. Once the paper is removed the adhesive allows the membrane to adhere to the substrate without the use of additional adhesives.