Roof Ice Shield Requirements

Roofing ice and water shield is a critically component to any new roofing system especially in cold weather climates.

Roof ice shield requirements.

On the eaves of your home up to 24 inside the exterior wall this usually means at least 2 rows or 6 feet in every valley 1 row or 3 feet around every pipe before the flashing is installed along every wall chimney or skylight where flashing will be. Five best practices reasons for using roofing felt underlayment. If you have a more complicated roof with valleys skylights dormers vent pipes or chimneys it s a good idea to have ice and water shield installed in and around these areas as well as along the eves. The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope.

The minimum is typically 2 feet 24 inches or 0 60 m above the vertical projection of the inside of the exterior wall. All overhangs should also be covered. On 4 12 or greater slopes the balance of the roof shall be one layer of 15 felt. An important component of making your roof less prone to leaks caused by ice damming is an ice and water shield.

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. Eaves flashing is required to prevent ice formation at the eaves and gutter to back up beneath the roof covering. 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. In colder regions a good practice is to cover the first 3 feet 36 inches or 0 91 m of roof over heated space with ice and water protector.