So during install the laminate will chip in corners and is water sits it can sink into the grooves and swell up the flooring.

I have found it better to go ahead and buy those wire sign holders that slip into the grooves of the corex sign.

You will probably have to shave the lip on both the long side and short side of the board.Now put a thin line of wood glue where the groove and lip (now trimmed down with razor knife) will meet.

Do you see a dark groove and a tiny button on the side.  

Under the cedar shingles were just open beams with some tongue and groove on the perimeter.

I could go either way with tile but if you get it make sure it is low sheen, without lots of grooves, again for easy cleaning between tenants.

Something like (warning, it's cheeky and Austin, TX centric):⭐⭐⭐⭐⭐ - A guest so smooth, they must have grooved in from a blues bar on Sixth Street.⭐⭐⭐⭐ - A fine guest with a touch of Austin quirkiness.⭐⭐⭐ - Decent guest, but we had a few "weird and wild" moments. ⭐⭐ - A guest who made me wonder if they brought their own "weirdness meter." ⭐ - Hosting this guest was like trying to find a quiet corner on Sixth Street during SXSW.There are actually a couple more sentences after each 1 liner for each star, but I removed that for brevity here.

I think menards may have a similar vinyl type tongue and groove vinyl flooring.

Is it old diagonal tongue/groove subfloor under fir?

In theory it's a fairly simple process but no two deals are the same, making it difficult to get into a groove.