A popular white plastic roofing membrane for flat roofs that reflects heat and has heat-welded seams — now the most common commercial flat roofing material.
A single-ply thermoplastic roofing membrane made from a blend of polypropylene and ethylene-propylene rubber, widely used in commercial low-slope roofing applications. TPO is welded with hot air at the seams to create a watertight bond stronger than the membrane itself. White TPO provides excellent solar reflectance, reducing cooling loads and qualifying for Energy Star and cool roof program requirements.
TPO membrane bids hinge on small specification details that swing material cost and labor significantly, so estimators must verify membrane thickness (mil), attachment method, and insulation R-value before pricing. Misreading mechanically-attached versus fully-adhered scope, or missing a fleak-warranty requirement, can leave a roofing sub underwater on award.
An estimator pricing a 60,000 SF warehouse re-roof confirms the spec calls for 60-mil fully-adhered TPO over polyiso to R-30, then prices the cover board, adhesive, and welding labor separately so the GC can compare the bid line-by-line against competitors.
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