Yesterday we spent a few hours with the pneumatic air guns banging on the many 'slate' roofing tiles up in the attic space. The 'slate' was actually randomly cut and painted pieces of 3/8" MDF or fiberboard. But when we nailed them on they looked a lot like the real thing!
We were short a few pieces which I'll make over the weekend and install first thing Tuesday. The temporary floor comes out Wednesday morning. Then it is on to the fireplace below.