In regards to the Douglas Fir floor that was shown on one of the programs, I need to know if I am leaving out anything. Use 3/8 or 1/2 inch thickness of wood. Any size or shape onto a subfloor. Not too large or warping will occur.First glue floor down, let set for two days. Then grout, let set for one day. Also add any stain to grout, then do final coat of varnish, stain etc. Then maintain like any wood floor. Oil it every 2 yearsusing a wood floor oil. Varnish once a year. Buff once a month. Grout formula is 2 parts of sawdust and one part shellac, varnish or polyuerethane and if you want to add stain. The grout for ther cobblewood flooring is composed of sawdust from the wood mixed with a fast-drying oil-based sealer in a ratio of 2 parts sawdust to 1 part sealer. Pour the grout on the floor push it into the cracks using a rubber trowel or your hands. Trowel in the grout. Squeegee off the excess. Steel wool the face to remove any remaining excess grout that could dry to the top of the bricks. Let it sit over night and then apply another coat of oil-based sealer the next day.