Many metal roofs are attached using screws where ice and water shield prefers smooth fasteners for the best seal.
Ice and water shield for metal roof.
Most manufacturers of fully adhered roofing underlayment or ice and water shield offer their product in two major categories.
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.
These categories are regular and what s known as high temp i never really thought too much about the difference until a customer of mine had a problem with a black substance oozing out between the metal diamonds on his roof.
Specifically designed to meet the challenges inherent in metal roof assemblies delivers all the advantages of grace ice and water shield with thermal stability up to 260 f seals around roofing nails resisting leakage caused by water back up ice dams or wind driven rain can be left exposed for up to 120 days.
Ice and water shield is a great product that can be used in spots to protect the most vulnerable areas of your roof or as a whole roof underlayment to protect from ice dams water dams storms and leaking in any area of the country and any weather.
There are chemical concerns depending on your metal finish so you should confirm with the metal roofing supplier.
Ht specifically for use under metal roofing.
Grace ice water shield is supplied in 3 ft wide rolls of varying lengths.
Note that grace makes grace ice amp.