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.