Steep-Slope Roof Coverings
Steep-Slope Roof Coverings The following roof coverings are commonly used on steep-slope roofs. These coverings are water shedding, rather than waterproofing. Special underpayment provisions are required when slopes are relatively low. The NRCA Roofing Manual provides underpayment guidance.
METAL PANELS AND SHINGLES When used on slopes greater than 3:12 (25 percent), hydro kinetic or water-shedding panel systems may be used. Hydro static (water barrier) systems may also be used. Structural panels may be specified if a solid deck