Roof System Types

Roof systems and materials generally are split into generic classifications: low slope and steep slope. Low slope roofing includes water impermeable, or weatherproof, kinds of roof membranes placed on slopes under or comparable to 3:12 (14 levels). Steep slope roofing includes watershedding kinds of roof covers placed on slopes exceeding 3:12 (14 levels).

Low-slope roofing

You will find five generic classifications of low slope roof membranes or systems. Click a roof system to learn more.

• Built-up roof (BUR) membranes

• Metal panel roof systems for low-slope programs

• Polymer-modified bitumen sheet membranes

• Single-ply membranes

o Thermoplastic membranes (e.g., PVC, TPO)

o Thermoset membranes (e.g., EPDM)

• Spray memory foam-based (SPF) roof systems

Most low-slope roof membranes have three principal components:

• Weatherproofing layer or layers – the weather proofing component is an essential element since it keeps water from entering a roof set up.

• Reinforcement – reinforcement adds strength, puncture resistance and dimensional stability to some membrane.

• Surfacing – appearing may be the ingredient that safeguards the weather proofing and reinforcement from sunlight and weather. Some surfacings provide other benefits for example elevated fire resistance, enhanced traffic and hail resistance, and elevated photo voltaic reflectivity.

With a few roof membranes, an element may perform several function.

Steep-slope roofing

You will find six generic classifications of steep slope roof covers. Click a roofer type to learn more.

• Asphalt shingles

• Clay tile and concrete tile

• Metal roof systems for steep-slope programs

• Slate

• Wood shakes and wood shingles

• Synthetic

Steep-slope roof systems typically are comprised of person pieces or components set up in shingle fashion. Steep-slope roof devices typically contain three primary parts:

• Roof deck – a roof deck may be the structural substrate in most cases is really a wood-based material for example plywood or oriented strand board (OSB).

• Underlayment – underlayment provides temporary protection until a roofer is installed and offers another weather proofing barrier. Sometimes underlayment is known to as “felt” or “paper.”

Roofer – the rooftop covering may be the exterior watershedding material.The ‘roof’ has no opening, so protects the contents, while the curve pushes the liquid back into the vessel after pouring, which prevents any drips forming.