Steep Slope Roof Minimum

Wood shakes can only be installed on roof slopes of 3 12 or greater 25 slope.

Steep slope roof minimum.

2 1 2 12 minimum roof slope for clay and concrete tile. Determine the minimum slope of the roof based on the roofing material. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Match roof material and use appropriate slope match the roofing on the covered porch with the main roof.

The profile refers to the shape the metal sheets take when they bend to form panels. 3 12 minimum roof slope for metal roof panels with nonsoldered seams without applied lap sealant metal shingles and wood shingles. For steep slope roof systems ibc 2018 provides for a 1 12 minimum roof slope for mineral surfaced roof roll roofing. So a roof with four inches of rise every 12 inches horizontally run would have a slope of 4 12 sometimes displayed as 4 12.

Wood shakes minimum roof slope roof pitch r905 8 2. The minimum pitch for. The slope of a roof often referred to as the pitch is determined by rise over run the roof s vertical rise in inches for every twelve inches of horizontal length the run. 2 12 minimum roof slope for asphalt shingles photovoltaic pv shingles and building integrated pv.

Minimum roof slope roof pitch r905 7 2. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The exact roof slope in degrees is given by the arctangent. This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units.

Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. See the below florida building code fifth edition 2014 2017 sections below to determine which slope is appropriate based on your specific design scenario.

Asphalt shingles continue to be the most widely installed roof covering option in north america. The required roof slope varies with application of materials and use. In degrees 10 2 in 12 or 1 in 6 is considered a minimum. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope.