Low Slope Roof Requirements

Most manufacturer and industry recommendations require or at the very least recommend special underlayment or other considerations on roofs between 2 12 and 4 12.

Low slope roof requirements.

Regardless the international building code ibc chapter 15 includes the following requirements for minimum slopes for metal roof panels. Anything above that will require you to put out higher cost because they are already considered as higher pitch. During this test the roof panel system is completely submerged under six inches of water for. An ssr may be installed on a roof down to 1 4 in.

Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope. Minimum roof slope roof pitch r905 10 2 1. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. Low slope metal roof systems are tested to astm e2140 standards a water penetration test evaluating the resistance of roof panels vertical seams.

The standard of lower pitch actually ranges between 1 12 to 5 12. Low slope and steep slope roofing systems have different industry standard testing requirements. Solar reflectance is a measure of the surface s ability to stay cool in the sun by reflecting solar radiation and emitting ther. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot.

Low slope roofs in climate zones 1 3 are required to meet minimum roof reflectance and emittance provisions sometimes referred to as cool roofs. The roofing safety zones.