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.
Todd Miller
2011-09-14 11:29:49.000000
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?
betty dunkin
2011-09-14 10:58:08.000000
Check with the manufacturer, however, they will universally tell you that you need some sort of underlayment.
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