Is Ice And Water Shield Required Under Metal Roofing

The short answer is probably not.

Is ice and water shield required under metal roofing.

Hence it s name is ice and water shield. Code interpretation 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. Roofing ice and water shield is a critically component to any new roofing system especially in cold weather climates. And also in southern climates it s put on the entire roof because even if the shingles blow off it keeps the water out.

It self seals around nails and provides protection for roof areas prone to ice and water intrusion. Most manufacturers of fully adhered roofing underlayment or ice and water shield offer their product in two major categories. Grace ice and water shield fully adhered smooth surface roofing underlayment provides best in class roof leak protection against wind driven rain and ice dams. I recently had 2900 sf of standing seam metal roof standing seam metal roof and ice and water shield 1 2 2010 within the general discussion discussion of the residential metal roofing forum.

These categories are regular and what s known as high temp. The product should be a premium high temperature ice and water shield for use with tile metal and other roofs with scrim reinforced top surface. 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. So in our area of the country we typically only put this up to the first three feet.

The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope. Not all roofing underlayments are the same the ice and water shield is an amazing roofing product that was first introduced in the 1980s. If you have a metal roof you generally don t have that problem because even if you do get ice it s going to build up at the edge. If you have a roof that you know to be older than 1980 it won t have this great product under the shingles.