Short for thermoplastic polyolefin, TPO is a single-ply roofing membrane that offers excellent performance at a cost-effective price. Heat-welded seams provide superior strength. TPO’s long-term heat, UV, and natural fungal resistance, plus flexibility without need for plasticizers also make TPO a reliable low-slope roofing system.
In the 20+ years that TPO has been in the field, it’s become one the most popular products used for low-slope roofing. Over 1 billion square feet are installed annually, making up over 50% of single-ply roofs being installed today. The rapid rise in popularity can be associated with several of TPO’s inherent benefits, including:
• Great Value: Excellent performance at a cost-effective price.
• Excellent Seam Strength: Heat-welded seams provide greater seam strength to taped and other seams.
• Long-term Weathering: Excellent long-term heat and UV resistance.
• Energy Saving: Highly reflective and emissive white surface can help reduce energy costs and urban heat island effect
• Inherently Flexible: No need for plasticizers
• Naturally Fungal Resistant: Doesn’t require biocides.
• Versatile Application Methods: Including high-performance roofs requiring high wind uplift, increased puncture resistance, or quick economical systems.
A recent study of EverGuard TPO roofs installed between 8 and 16 years ago found they all performed above ASTM standards for newly manufactured TPO. GAF analyzed membrane samples from roofs across the US and studied thickness over scrim, surface cracking, and the ability to repair aging TPO membranes.