Beadboard paneling installed without adhesive

Hello.
This past weekend my husband and son installed beadboard paneling in a first floor half bathroom. I was to paint the ceiling and the paneling. I was doing research on how to handle the corners (paintable caulk, trim, etc.) and was reading where most people suggest using an adhesive along with a nail gun to install the paneling. Our has been installed without adhesive.

I'm wondering what issues might arise down the road if I don't bring this issue up with my husband.

(these are floor to ceiling panels around the whole room with trim at the top and bottom - trim hasn't been installed yet.)

 

I would agree adhesive is usually the norm, how wide are the panels/planks and how were they attached?

 

It is 4 x 8 beadboard paneling sheets. The longest wall is about 65". The 2 shorter walls are about 53". One wall has a door, adjusted to the side and is about 30" of paneling.

 

No issues whatsoever if he is nailing it to the studs. (or to lath) Adhesive can be used on walls to reduce the amount of fasteners (i.e. holes) needed. Ceilings need to be glued between the studs otherwise gravity can cause it to sag eventually. That's not an issue on walls.

 

@xsleeper, thanks so very much!