betty dunkin
9/14/2011
I'm having a metal roof put on over my exsisting shingles and I'm wondering if it is better to put felt on between the shingles and metal?
Todd Miller
Isaiah Industries, Inc.
9/14/2011
I always suggest underlayment be used in that application and I also interpret the International Building Code as requiring it, though not all folks may have the same interpretation of the code.
Eric Novotny
An informed customer is the Best Customer!
9/16/2011
Check with the manufacturer, however, they will universally tell you that you need some sort of underlayment.

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