Thanks for the reply, Google wasn't really giving me the answers I wanted if I'm honest but will bear your thoughts in mind.
Thanks for the tip on the ply!
Morning All.
I intend to utilise a small area on the back of our house to build a small wooden out house come wet room. It's basically somewhere to chuck the boots and coats and the wet dog after walkies. It'll only be about 1500mm x 2000mm floor space by 2500mm to the top of the single pitch...