hi
I have mounted plywood on the wall. Before I screwed it in place, it was stored in a warm workshop, lying in a stack on a pallet, and was super straight.
The house is 17 sqm and I don't have any ventilation yet, it's natural insulation without plastic so it can breathe.
I've had the heater on a bit too high temperature, could that have affected it becoming wavy?
Will it straighten back out?
I think if you were to mount plasterboard on it, it would crack in the joint compound when it became so wavy... now I'm going to have it as the surface finish, so it's mostly an appearance issue. But interested in understanding why it becomes like that.