TPO membrane sheets area blend of polypropylene and ethylene propylene polymers and usually are reinforced with polyester. TPO sheets contain colorant, flame-retardants, UV absorbers and other proprietary substance to achieve desired physical properties. Sheet widths are 3.05m and 3.66m gray only. TPO comes in two different thickness 1.14mm and 1.52mm, 1.14mm for flat or low slope roofs and 1.52 for decks, which will have a floating timber or tile deck. Six Colour Options: Grey, White, Mansard Brown, Patina Green, Rock Brown, Slate Grey.