TPO

(Thermoplastic Polyolefin)

Advantages

• Seams are heat welded to avoid adhesive failures.
• White Surface reflects 85% of harmful U.V. rays to extend the lifespan of white TPO.
• TPO is a fully adhered roof membrane secured by screwing through the underlying wood decking, making it more secure than modified roofing. Adhesive can be used to assist bonding, especially at flashings.

Disadvantages

• TPO Surface bonding to the reinforced mesh has been a manufacturing problem with many manufacturers. The most reliable product that has proven stability is manufactured by Carlisle.
• TPO is vulnerable to impact from hail.
• Reinforcement in TPO is a lot less than in reinforced PVC woven reinforced membrane.