TPO, or Thermoplastic PolyOlefin, roof systems are the fastest growing low-slope roof systems in the United States. Weathercraft has been installing TPO systems since the mid-1990s. What sets TPO roof apart from other commercial roofing systems is the availability of a manufacturer’s labor and material roof warranty. These warranties are unique as they are not pro-rated and cover the labor to repair, unlike all other warranties. What this means is that the manufacturer will pay a contractor to repair your roof at no cost to the building owner if the roof systems fails on its own. These warranties are invaluable to owners who have numerous roofs to manage or want the peace of mind that their leak issues will be corrected.
There are numerous TPO manufacturers in the United States that offer manufacturers’ warranties. Firestone, GAF, and Carlisle are three of the largest manufacturers, and Weathercraft is qualified to install all three systems. Weathercraft has been a Firestone Master Contractor (top 250 contractors in the United States) since 1990.
Manufacturers’ warranties are available in 10-year and 15-year systems, with some 20-year systems possible, depending on the roof situation.
TPO systems are “heat-welded” at the seams. There are two commonly used attachment methods for TPO systems: mechanically fastened and fully adhered. In mechanically fastened systems, the TPO is “stitched” to the deck over a layer of insulation with screws. A fully adhered TPO system is when the TPO sheet is glued directly to the layer of insulation, which is attached to the deck. Mechanically fastened systems are the more common and cost-effective TPO system, but certain circumstances will require the fully adhered systems.
One of the advantages of a TPO system is its “robust” chemical make-up, which allows for good hail and weather resistance. It also has a white reflective surface, which qualifies for an “Energy Star” rating, reduces Urban Heat Index and helps systems that are under-insulated.