Mm Floors: For the record the below left photo was TERRIFYING to take. Don't get vertigo but turned into a total weed stepping from joist to joist to take it, looking down to the floor below and mildly internally freaking out. That was on Monday. The below right photo was Friday. No more photographer vertigo, and something that looks like it could hold two bedrooms, two bathrooms and a dressing area. Hurrah! A real top floor. With an actual floor! The steel things (actual technical term) are to be screwed in to the floor to hold the walls in place.