Roof System Types

Roof Classifications

Roof system types and materials are divided into two (2) general classifications: low-slope and steep-slope.

LOW-SLOPE ROOF SYSTEMS

Low-slope roofing consists of materials and systems that are impermeable to water or weatherproofed and are typically installed on slopes less than 3:12 (14 degrees).

low-slope roof
Steep-slope roof

STEEP-SLOPE ROOF SYSTEMS

Steep-slope roofing consists of materials and systems that are considered “watershedding” such as shingles and are generally installed on slopes exceeding 3:12 (14 degrees).

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