Ibc Minimum Flat Roof Slope

For steep slope roof systems ibc 2018 provides for a 1 12 minimum roof slope for mineral surfaced roof roll roofing.

Ibc minimum flat roof slope.

Per foot would be acceptable. The minimum slope the code allows is in 12 in. This logic does not consider that lower sloped roofs will not drain water at the same rate as roofs with greater slopes. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures.

This means that even less than the minimum of in. For roof slopes from two units vertical in 12 units horizontal 17 percent slope up to four units vertical in 12 units horizontal 33 percent slope double underlayment application is required in accordance with section 1507 2 8. And 4 12 minimum roof slope for slate and wood shakes. 3 12 minimum roof slope for metal roof panels with nonsoldered seams without applied lap sealant metal shingles and wood shingles.

2 1 2 12 minimum roof slope for clay and concrete tile. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. 2 exactly does not translate to 1 4 per foot. I am looking at the ibc minimum roof slope requirement for standing seam metal roof.

When required testing is in accordance with astm e108 or ul 790. The ibc table 1505 1 lists the minimum requirements for roof covering fire resistance classifications a b or c for all types of. I understand this is more of rounding off to get to a nice number. So typically we follow 2 slope is that meeting the code even if the slope is slight shy of 1 4 per foot.