Does anyone want to venture a guess as to what the black stuff is between the boards? I'll give you a hint: The floor is on the deck of a boat.
It looks like a nice way of detailing the floor that will handle water well. But from what I can tell, the floor is only about 8 months old. I'd love to see it again in a couple years. And I don't think it would work on a floor where finish would be applied. I don't even know if this floor can be oiled.
Covered areas of the boat's floor are parquet glued to plywood and finished with a glossy top coat. Here's a cross section view of a hatch cover in the floor:
We've put water all over this floor for days, with no apparent effect. Again, the floor is only 8 months old or so, and it would be interesting to see how it holds up to salt and fresh water over time.
All Things Wood Floor, created by Wood Floor Business magazine, talks to interesting wood flooring pros to share knowledge, stories and tips on everything to do with wood flooring, from installation, sanding and finishing to business management.