IMAC Thermoplastic roofing IMAC Thermoplastic roofing is widely known for rigid unplasticized polyvinyl chloride or commonly known as uPVC roofing materials. IMAC roofing are available in Rib Type and Corrugated profiles. IMAC uPVC Roof Corporation Head Office located at Unit D 7th flr. DN Corporate Center 1388 Quezon Ave. Brgy. South Triangle, Quezon City.