Ice And Water Shield Roof Code

Ice and water shield.

Ice and water shield roof code. Detached accessory structures not containing conditioned floor area. 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. Roofing ice and water shield is a critically component to any new roofing system especially in cold weather climates. The minimum net free ventilating.

On roofs with slope equal to or greater than eight units vertical in 12 units horizontal 67 percent slope the ice barrier shall also be applied not less than 36 inches 914 mm measured along the roof slope from the eave edge of the building. 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. Ice water shield is a thick sticky back underlayment also known as felt paper that will adhere to your roof deck and prevent water from seeping into your home if it gets under your shingles. The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope.

Building codes questions ray boosinger phone. Eaves flashing is required to prevent ice formation at the eaves and gutter to back up beneath the roof covering. 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 and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen.

In addition an ice barrier that consists of at least two layers of underlayment cemented together or of a self adhering polymer modified minimum vent area. 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 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. The code requires that underlayment of one layer of non perforated type 15 felt lapped two inches horizontally and four inches vertically to shed water.