TPO – Thermoplastic Olefin

The Thermoplastic TPO or PVC roofing system is also single-ply. Due to the material’s chemical nature, thermoplastic membranes are usually seamed by heat welding with hot air or solvent welding. TPO sheets are a mix of polypropylene and ethylene propylene polymers and are usually reinforced with polyester. TPO sheets include colorant, flame-retardants, UV absorptions and other proprietary substances to attain certain preferred physical properties.

  • Sheet width: 6 ft. – 12 ft.
  • 40 mm – 100 mm thick
  • seams are sealed by heat welded with hot air
  • membranes are usually white or black


PVC sheets include plasticizers and stabilizers, as well as additional additives to impart flexibility and accomplish other desired physical properties. Some membranes are obtainable with nonwoven fleece backing adhered to the underside of a sheet.

  • Sheet width: 6 ft. – 12 ft.
  • 45 mm – 90 mm thick
  • seams are sealed by heat or chemical welding
  • membranes are made in numerous colours, gray and white being the most common