Low Slope Roof Requirements

Low slope and steep slope roofing systems have different industry standard testing requirements.

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. Anything above that will require you to put out higher cost because they are already considered as higher pitch. The standard of lower pitch actually ranges between 1 12 to 5 12. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope.

Personal fall protection systems e g personal fall arrest travel restraint positioning system 42 inch high parapet. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. The roofing safety zones. An ssr may be installed on a roof down to 1 4 in.

Low slope roofs in climate zones 1 3 are required to meet minimum roof reflectance and emittance provisions sometimes referred to as cool roofs. As well a slope of 4 12 is most commonly considered the lowest slope for standard shingle installations. Minimum roof slope roof pitch r905 10 2 1. On 12 2 slope.

Regardless the international building code ibc chapter 15 includes the following requirements for minimum slopes for metal roof panels. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope.