Can metal panels be installed directly over my old worn-out shingles?

Yes, because metal roofing is significantly lighter than an asphalt shingle roof you can often attach metal panels without tearing off your existing shingle roof. This eliminates tear off and disposal costs. It is also the environmentally friendly green thing to do because your old asphalt shingles won’t be dumped into a landfill. Make certain that your local building codes approve of this method.