The Asphalt shingle roof (3:12 Pitch, 1/2" OS deck on 2' centers) on my 7 year old Doublewide is shot. Which option would you go with:
1. Remove old shingles and replace with Asphalt shingles
2. Shingle over existing shingles
3. Add 1 x4 purlins 2' on Center and use metal roofing
Thanks John