Hi all, I am just replacing the old bedboard in my Peugeot boxer PVC and I really just want to smarten it up, the old central filling bedboard is just not suitable for purpose anymore. I think I’ve got my head around how to fix it but I’m just wondering what sort of board to use. I know I can get a piece of 15 mm light weight board fibreboard but it seems expensive for something that’s only going to be under the mattress and I’m wondering whether it’s best to use ply and what thickness, or is it marine ply that I need to use? The weight is not an issue , I’ll be using two pieces cut to size to fill the gap, both about 1m by 50 cm , helpful to hear your opinions