Ice Barrier Roofing Code

Ice dams are formed by the continuous melting and freezing of snow due to heat escaping from the house or from a backup of frozen slush from the rain gutters the melted water flows under the snow and freezes as it reaches the unheated soffit area at the eaves thus.

Ice barrier roofing code. But ice dams can form in the gutter as well as on the roof. A couple of examples of how far up the slope of the roof the ice barrier membrane must be installed. By installing the ice barrier up. Ice water barrier codes the roofing codes that mandate how much water ice barrier should be used on roofing projects will be different from region to region.

Roofing to define deck balcony area code requirements. Roofs shall be protected with roofing including flashing installed to shed rain effectively and prevent water due to ice damming from entering the roof. Overhang and a 2 6 exterior wall. Ice dams are a serious issue for homeowners and roofing professionals in cold climates or even where occasional snow may fall.

R905 1 2 ice barriers in areas where there has been a history of ice forming along the eaves causing a backup of water as designated in table r301 2 1 an ice barrier shall be installed for asphalt shingles metal roof shingles mineral surfaced roll roofing slate and slate type shingles wood shingles and wood shakes. In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in table r301 2 1 an ice barrier that consists of at least two layers of underlayment cemented together or a self adhering polymer modified bitumen sheet shall be used in place of normal underlayment and extend from the lowest edges of all roof surfaces to a point at least 24 inches 610 mm inside the exterior wall line of the building. Not all roofing materials require an ice barrier. Eaves flashing is required to prevent ice formation at the eaves and gutter to back up beneath the roof covering.

47 inches up the roof slope from the drip edge. Los angeles building code 15 roof assemblies and rooftop structures 1507 requirements for roof coverings 1507 9 wood shakes 1507 9 4 ice barrier r905 1 2 roof assemblies ice barriers in areas where there has been a history of ice forming along the eaves causing a backup of water as designated in table r301 2 1 an ice barrier. The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope. Had the ice barrier been installed according to the code there likely would not have been leaks.

This code implies that ice and water shield eaves flashing is required for installation on all heated steep slope structures exception is unheated structures in colder climates. The roofing codes in minnesota for example require that two layers of an ice water shield be adhered to the roof before the felt or finished roofing product can be added. 6 pitch roof with a 12 in. First we look to section 9 26.

With the code recommended installation of the ice barrier over the drip edge water can back up at the.