hi all
im currently stuck on my layout with roofs for my engine sheds
one span is 4ft and another 2 at 2ft
I have tried MDF with plastic sheeting glued on top and eventually it bowed and always keeps bowing
I built within the shed a plastic sub frame to support the roof buts still suffer with the same issue
I was looking into trying balsa wood but thought I would see if anyone might have better ideas
Chris
