We plan to build a cold storage 8 meters high. Should we use insulation panels with cam locks or panels with tongue and grooves. The cold room will have a -25 deg C temperature.
I use cam locks all the time. The thicker the insulation, the better. Caulking the joints is very important as well as sealing all conduits that enter the freezer, other wise you will have moisture drawn into the electrical systems. Have you made provisions for isolating the floor?