Can you avoid tearing off your old asphalt shingle roof by putting a steel roof over it? Maybe. Most codes now allow no more than two layers of roofing before requiring a complete tear-off. So, if ...

Originally Posted On: https://www.tastefulspace.com/blog/2020/02/23/7-common-shingle-types-you-need-to-know-a-roofing-guide/ The roofing business is a $31.4 billion ...