Hello
Can your metal roof be placed on existing asphalt shingles.
Thank you
Guest User
2016-06-08 18:52:51.000000
Every roofing project has separate considerations but it is not unusual for many residential metal roofs to be installed over a layer of old shingles. The low weight of metal is a factor in this and, unlike asphalt shingles when they are installed as a second layer, it usually does not affect the warranty.