I'm getting ready to install under-floor insulation in my yurt platform. These are 2" x 4' x 8' foam panels under a 1 1/8" plywood floor, between 4" x 6" 0.40 ACQ pressure treated joists. The foam panels will be held in place with lathe strips screwed in to the joists.
I have been using hot-dipped galvanized fasteners for the structure of the yurt platform until now, but is that still necessary when attaching the lathe strips that hold these insulation panels? The load on these fasteners will be minimal.