Ice And Water Shield Roof Code

4101 1 15 01 roof assemblies and rooftop structures.

Ice and water shield roof code. Ice and water protector sometimes also referred to as ice and water shield is a waterproof roof underlayment membrane developed to protect vulnerable areas on a roof from ice and water damage. Ice barrier in areas where there has been a history of ice forming along the eaves causing a backup of water an ice barrier that consists of at least two layers of underlayment cemented together or of a self adhering polymer modified bitumen sheet shall be used in lieu of normal underlayment and extend from the lowest edges of the roof surfaces to the point at least 24 inches inside the. Roofing ice and water shield is a critically component to any new roofing system especially in cold weather climates. For roof slopes from two and one half units vertical in 12 units horizontal 21 2 12 to four units vertical in 12 units horizontal 4 12.

Many local building codes require ice and water shield and national building code states ice and water shield must start at the roofs eave edge and extend 2 ft inside heated wall space of a structure. 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. A 4 12 roof slope means the roof rises 4 feet for every 12 feet of horizontal roof span. Ice and water shield.

Clay and concrete roof tile shall be installed on roof slopes of two and one half units vertical in 12 units horizontal 21 2. When a reference is made within this rule to a federal statutory provision an industry consensus standard or any other technical publication the specific date and title of the publication as well as the name and address of the promulgating agency are listed in rule 4101 1 35 01 of the administrative code. Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen. Fasteners for asphalt shingles shall be galvanized steel stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 3 mm shank with a minimum 3 8 inch 10 mm diameter head astm f 1667 of a length to penetrate through the roofing materials and a minimum of 3 4 inch 19 mm into the roof sheathing.

Roof slopes between 2 12 and 4 12 can use shingles but require roof application techniques to take into account a greater potential for ice dam water backup. Code 675 iac 14 4 4. If an ice dam occurs on your roof and water backs up under the shingles it will seep down into your home through the nail holes holding the shingles. Note that r903 r904 and r905 1 and their respective subsections apply to all roofing types unless indicated otherwise.

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. The 2020 indiana residential code regulates ice water shield and drip edge as follows. The 2020 indiana residential code adopts and amends the first printing of the 2018 international residential code.