Flat Roofing Systems
Most low-slope roofing systems have three principle components:
Weatherproofing layer or layers — the weatherproofing component is the most important element because it keeps water from entering a roof assembly.
Reinforcement — reinforcement adds strength, puncture resistance and dimensional stability to a membrane.
Surfacing — surfacing is the component that protects the weatherproofing and reinforcement from sunlight and weather. Some types provide other benefits such as increased fire resistance, improved traffic and hail resistance, and increased solar reflectivity. Some commercial roofing systems feature roof membranes which may perform more than one function.