Ice And Water Shield Code Mn

Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen.

Ice and water shield code mn. 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 a 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 all roof surfaces to a point at least 24. Local amendments of the state building code are not permitted. Detached accessory structures garages and storage buildings that contain no conditioned floor area are not required to have an ice barrier. However we far exceed that code by doing valleys and flashings as well.

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. A good rule of thumb is 1 overhang 3 ice shield. Protection against ice dams can be obtained by using a special waterproof shingle underlayment at the eaves or ice barrier determination lower edges of the roof in addition to installing adequate ventilation and proper insulation in the attic.

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. The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope. Water gets under roofing shingles. 2020 mn building code.

2020 mn residential code 2017 national electrical code 2020 mn mechanical and fuel gas code. 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. The code in minnesota requires this special waterproof shingle. 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.

The minnesota state building code incorporates by reference the following model codes. Typicaly the code is 1 5 past the exterior warm wall at the gutter lines. 2 over hang 6 ice shield. Eaves flashing is required to prevent ice formation at the eaves and gutter to back up beneath the roof covering.