UFC 3-110-03
26 September 2006
structural design. Further, with an occupied building, construction noises, fumes, fire
hazards, and roof access all take on increased importance.
1-5
SYSTEM TYPES.
The two main types of roof systems are steep slope and low slope.
1-5.1
Steep Slope.
Steep slope roofing systems are water-shedding types of roof coverings installed on
slopes greater than 3:12 (14 degrees) and typically consist of asphalt shingles, slate,
tile, and metal roofing.
1-5.2
Low Slope.
Low slope roofing systems are weatherproof membrane types of roof systems installed
on slopes at or less than 3:12 (14degrees). Types of low sloped roofing systems
include bituminous built-up (BUR), modified bitumen (MB) roofing, single-ply (i.e., PVC,
EPDM), sprayed-in-place polyurethane foam (SPF), and standing seam metal roofing
(SSMR).
3
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