The floor of the change room didn’t need to be quite so waterproof as in the “wet” areas of the sauna. As such, I opted to finish it off in red pine.
Unlike V jointed lumber, tongue and groove boards fit together nearly flush for a perfectly flat finish (or thereabouts). Otherwise, installation is the same as for V joint.
Also in the change room I provided a trap door to gain access to the crawlspace under the sauna. Instead of any fancy fittings to lift the board, I simply drilled out two 1″ diameter holes at each end of the board. No hinge or anything showy, just lift out and climb in.
The floor looked great for a few hours, until continued construction traffic dirtied it completely up. I’m hoping that once construction in the sauna tapers off, I’ll get a chance to clean, sand, and treat it. In the meantime, I suppose it is developing some character!