Norm recaps progress on the mudroom and kitchen. Tile contractor Mark Ferrante installs a porcelain plank floor tile, made to look like wood, that he's using on the treads and risers of the stairs to the garage. Master electrician Allen Gallant shows Kevin how to properly abandon an old electrical box and how to fish wires to a new one. In the great room, Kevin shows how to patch the holes where the old recessed lights were: rigid insulation, strapping, wallboard and plaster. In the backyard, contractor Mauro Henrique shows Norm a smart, efficient way to paint shutters. Richard explains the thinking that goes into the logical layout of a mechanical room and Tom shows Kevin how he's turning an arched doorway into one that's squared off to match the rest of the openings on the first floor.