Commercial Roof Systems
Modified Bitumen
(1) A bitumen modified by including one or more
polymers; (2) composite sheets consisting of a
polymer modified bitumen often reinforced with
various types of mats or films and sometimes
surfaced with films, foils or mineral granules.
Types:
SBS—styrene butadiene styrene
APP—Atactic polypropylele
Single Ply
A roofing system in which the principal roof covering is a single layer flexible membrane.
Types:
EPDM—single-ply rubber system
1. fully adhered
2. mechanically fastened
3. ballasted
TPO—thermoplastic oelfin – heat welded, usually white
PVC—polyvinyl chloride
Built-up (Bur)
A continuous, semi-flexible roof membrane, consisting of multiple plies of saturated felts, coated felts, fabrics. Or mats assembled in place with alternate layers of butimen, and surfaced with mineral aggregate, bituminous materials, a liquid applied coating or granule-surfaced cap sheet.
