I have an old garage I use for storage and the roof has started to get holes in it . It has has fiberglass roofing on it now and I want to replace it with metal would you use the type they use to put on barns or would tou use the new stuff that they are putting on a lot of houses now ? Which would cost more ? When installing the new metal with screws do the screws go on the flat part or on the raised parts ? I ask two dealers and got to different answers . Thanks for the help have to start on it soon . :waa: