I have had two appointments contractor for the removal and replacement of my mobile home roof. One says Az. Law requires removal of the old roof with only one layer and another appointment Az. Law allows two layers of roofing. This makes a difference in the over all costs. Please advise. Thank you. Well, I have not the answer here. According to the specification of the manufacturer of the shingles, we can only put a layer on again. This is Owens Corning and elk and other major brands that we use here in North Carolina. Call ur local building inspector and I know he will tell you "what ever the manufacture suggest or say to install" will be your answer. Ask both roofing contractors in the book to show what is right. Lic. Gen. Contractor
1761 Navajo Rd Southport 28461 metal roofing over mobile Home. Rubber roofing on low slope roof Mobile Home Po. . .