Is Ice And Water Shield Required Under Metal Roofing

Hence it s name is ice and water shield.

Is ice and water shield required under metal roofing.

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. 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. 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. 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.

Protects under all standard sloped roof coverings grace ice water shield roofing underlayment protects under slate tile cedar shakes or metal as well as under conventional asphalt shingles. And so what happens is the water hits that ice dam and then backs up under the roof shingles and causes leaks. 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. These categories are regular and what s known as high temp.

Most manufacturers of fully adhered roofing underlayment or ice and water shield offer their product in two major categories. Not all roofing underlayments are the same the ice and water shield is an amazing roofing product that was first introduced in the 1980s. 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. And also in southern climates it s put on the entire roof because even if the shingles blow off it keeps the water out.

The short answer is probably not. The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope. So in our area of the country we typically only put this up to the first three feet. Gcp invented fully adhered roofing underlayments more than 35 years ago.