Our summer home is a metal building garage that we found on the market. Since it was 100′ x 40′, we took the back 24′ and framed off our living area. This took a little figuring, but was so worth it! The insulation factor is amazing…. a building within a building. The space above the headers became our attic accessible from the large building. We ordered new windows and back door for the back wall. We had to remove the loading dock door and cut through the metal with a sawzall for the window openings.