A Brad Nailer into studs at the Gab try not to ruin finish with Face nailing , use wallboard Glue for that ,
Did a bathroom with 2 inch nails/nail gun. No problems. Face nailing (2) top and bottom will require possibly using a nail set to get nail below the surface if it didn’t do so with nail gun. Then filling the holes with putty or wood filler then sanding. Lot more time than nailing the tongues. But it’s an option. Good luck.
Should be 4 5/8 for the face of the board + gap reveal. But it will vary because the boards cup and bow so badly.
Called nickie back for a reason. That’s the set distance
Yes, the product comes primed, you will need to paint it with exterior paint.
No, I would not recommend that since it is Wood , I would leave a opening the width of the Range Behind this I would install a sheet of Aluminium That Home Dept sells in case of any fire.
Yes, you need to find the joists to nail to and use something like liquid nail on the back. The liquid nail will keep it from sagging.
No it is the backside of Board and unsightly The Gap would not be shown
sure But would not advice it , since all measurements are not the same