All structural metal roofing systems having a thickness equal to or greater than 22 gage and all nonstructural metal roof systems having a thickness equal to or greater than 26 gage shall be exempt from the.
Ibc chapter 15 roof slope.
Roof slope up to 3 12.
Proper ventilation is also important for performance in cold climates and the ability to shed or retain snow must also be considered.
Cold climates create unique conditions for roof design and prevention of ice and snow related damages.
Roof slope 3 12 and over.
One fastener per tile.
The primary roofing chapter in the ibc is chapter 15 roof assemblies and rooftop structures.
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.
Flat tile without vertical laps two fasteners per tile.
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.
In areas where there has been a history of ice forming along the eaves causing a backup of water an ice barrier must be installed in accordance with chapter 15 of the 2015 ibc or chapter 9 of the 2015 irc.
This means for every 12 horizontal units the roof must rise a minimum of one fourth vertical unit.
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.
Only one fastener on slopes of 7 12 and less for tiles with installed weight exceeding 7 5 lbs sq.
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.
Minimum roof slope roof pitch r905 15 1 liquid applied roofing must have a design roof slope of 1 4 12 or greater 2 slope.
Two fasteners per tile.
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.
The primary roofing chapter in the irc is chapter 9 roof assemblies.
Chapter 15 roof assemblies and rooftop structures section 1501 general 1501 1 scope.
However many other parts of the code deal with aspects of roofing.
Roof coverings installed on low slope roofs roof slope 2 12 in accordance with section 1507 shall resist impact damage based on the results of tests conducted in accordance with astm d3746 astm d4272 cgsb 37 gp 52m or the resistance to foot traffic test in section 5 5 of fm 4470.
For help finding them see our quick roofing guide to the ibc.
