Low Slope Roof Requirements

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

Low slope roof requirements.

On 12 2 slope. Low slope metal roof systems are tested to astm e2140 standards a water penetration test evaluating the resistance of roof panels vertical seams. As well a slope of 4 12 is most commonly considered the lowest slope for standard shingle installations. Regardless the international building code ibc chapter 15 includes the following requirements for minimum slopes for metal roof panels.

Minimum roof slope roof pitch r905 10 2 1. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot. During this test the roof panel system is completely submerged under six inches of water for. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope.

The standard of lower pitch actually ranges between 1 12 to 5 12. Personal fall protection systems e g personal fall arrest travel restraint positioning system 42 inch high parapet. The roofing safety zones. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope.

Anything above that will require you to put out higher cost because they are already considered as higher pitch. Low slope roofs in climate zones 1 3 are required to meet minimum roof reflectance and emittance provisions sometimes referred to as cool roofs.