Ice And Water Shield Code

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.

Ice and water shield code. The minimum net free ventilating. The 2020 indiana residential code regulates ice water shield and drip edge as follows. 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. 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 state of illinois has not adopted statewide building codes. 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. It is important to consult davenport city code in addition to recognized codes as local amendments to these codes may apply. Eaves flashing is required to prevent ice formation at the eaves and gutter to back up beneath the roof covering.

Ice and water shield. 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 inches 610 mm inside the exterior wall line of the building. In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in table 301 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. 2 over hang 6 ice shield.

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. Roofing ice and water shield is a critically component to any new roofing system especially in cold weather climates. Typicaly the code is 1 5 past the exterior warm wall at the gutter lines. The best and most accurate answers to building code questions must be answered by your city village or county code official.

Codes are adopted by ordinance and codified in davenport city code. The 2020 indiana residential code adopts and amends the first printing of the 2018 international residential code. Ice and water code. Code 675 iac 14 4 4.

However we far exceed that code by doing valleys and flashings as well. Instead units of local government such as cities and counties can adopt codes of their choice. Note that r903 r904 and r905 1 and their respective subsections apply to all roofing types unless indicated otherwise. A good rule of thumb is 1 overhang 3 ice shield.