Steep-slope roofing

Steep slope roofing includes watershedding types of roof coverings installed on slopes exceeding 3:12 (14 degrees).There are six generic classifications of steep slope roof coverings.

  • Asphalt shingles
  • Clay tile and concrete tile
  • Metal roof systems for steep-slope applications
  • Slate
  • Wood shakes and wood shingles
  • Synthetic

Steep-slope roof systems typically are composed of individual pieces or components installed in shingle fashion. Steep-slope roof assemblies typically consist of three primary parts:

  • Roof deck — a roof deck is the structural substrate and usually is a wood-based material such as plywood or oriented strand board (OSB).
  • Underlayment — underlayment provides temporary protection until a roof covering is installed and provides a secondary weatherproofing barrier. Sometimes underlayment is referred to as "felt" or "paper."
  • Roof covering — the roof covering is the external watershedding material.

 

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