Ice And Water Shield Roofing Code

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.

Ice and water shield roofing code. 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. Building codes reporting phone. 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. Building codes regulations 401 south spring street 3rd floor stratton building springfield il 62706.

Eaves flashing is required to prevent ice formation at the eaves and gutter to back up beneath the roof covering. Ice and water shield roofing ice and water shield is a critically component to any new roofing system especially in cold weather climates. 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. 4101 1 15 01 roof assemblies and rooftop structures.

Building codes questions ray boosinger phone. Section r905 2 and its subsections apply specifically to asphalt shingle roofs unless indicated otherwise. The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope. 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 code requires that underlayment of one layer of non perforated type 15 felt lapped two inches horizontally and four inches vertically to shed water. Note that r903 r904 and r905 1 and their respective subsections apply to all roofing types unless indicated otherwise. The 2020 indiana residential code regulates ice water shield and drip edge as follows. 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.

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.