My shop building, and the garage, have vertical-ribbed steel siding, and peaked roofs. At some time in the past, the main building and the garage were joined with an in-between section that is approx 6 feet narrower than the other two, with a 'flat' roof. Apparently there was no flashing used, because there is none visible now. Because of settling (The main building was built in 1900) there are now gaps at each end, and the water is coming in. I have no money to hire a roofer, and no clue what to do now. I have photos, if that helps. Thanks for any suggestions you can make.