TPO Roofing

TPO Roof

TPO stands for thermoplastic Polyolefin which is a single ply roofing membrane which is reflective. It is made from a combination of ethylene-propylene and polypropylene. This type of roofing is installed on many commercial buildings by either mechanical attachment or full adhesion.

TPO stands for Thermoplastic Polyolefin. Thermoplastic means that it becomes plastic upon heating and hardens upon cooling, and this is how it seals at the seams. A hot air welder is used to heat the membrane above and below, turning it to plastic and making it moldable. While it is still plastic, a roller is used to fuse the top and bottom membranes together, forming the watertight seam, typically 1 ½” wide if done by robot or 2″ wide if done by hand. No matter which option is chosen below the membrane, this is how all TPO roofs are sealed at the seams.

TPO is typically sold in thicknesses of 45 mil, 60 mil and 90 mil. In Indiana, we typically see 45 mil and 60 mil specified. The thicker the membrane, the better the long term durability. For example, if the owner expects workers to routinely service rooftop mechanical units, a thicker roof membrane should be considered.
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Call The Best West Roofing at 323-304-3580 to discuss all the different roofing options to revive the beauty of your home.