Thermoplastic Polyolefin (TPO) and Poly Vinyl Chloride (PVC) are thermoplastic roof systems that are both white and highly reflective roof membranes. These roofs provide excellent weathering characteristics and are highly resistant to ultraviolet light and most chemicals. The membranes have a reinforced scrim and are puncture and tear resistance. Thermoplastic roofs have outstanding seam strength due to the fact the sheets are welded together using hot air. These types of roof systems are lightweight and well suited for second generation (roof-over) applications.
TPO and PVC roof systems are typically installed in one of three methods and provide a lightweight, cost-effective solution:
- Mechanically attached – The roof membrane is affixed to the structural deck with mechanical
- Fully adhered – The membrane is bonded directly to the affixed insulation board or
other roofing membrane substrate.
- Point-affixed – Ideal for retrofit installation over metal applications, plates are installed
at set intervals and the roof membrane is welded directly to the plates.