Question : can i lay a new asphalt shingle roof over existing one,,only one layer now ,in ca.?
it is a mobile home and roof is in decent condition,,,i just want to make sure we can do the work my father is old and this is retirement community,,,approx 1000.00sq ft..minior pitch,,and want to lay over old one,estimate was close tio 5,,gs,,unreal
mobile home retirement communities

Best answer:

Answer by virgil l
Yes you can as long as there is no more than two layers total thickness.