Is Ice And Water Shield Required Under Metal Roofing

So in our area of the country we typically only put this up to the first three feet.

Is ice and water shield required under metal roofing.

Roofing ice and water shield is a critically component to any new roofing system especially in cold weather climates. It self seals around nails and provides protection for roof areas prone to ice and water intrusion. And also in southern climates it s put on the entire roof because even if the shingles blow off it keeps the water out. Most manufacturers of fully adhered roofing underlayment or ice and water shield offer their product in two major categories.

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. These categories are regular and what s known as high temp. Hence it s name is ice and water shield. 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.

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. Gcp invented fully adhered roofing underlayments more than 35 years ago. Not all roofing underlayments are the same the ice and water shield is an amazing roofing product that was first introduced in the 1980s.

The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope. If you have a roof that you know to be older than 1980 it won t have this great product under the shingles. And so what happens is the water hits that ice dam and then backs up under the roof shingles and causes leaks. The short answer is probably not.