Garage: The walls inside the hangar?

plans wood storage building you need to keep in mind: question jonass21 ? The interior walls of a shed I made a sturdy wooden frame with aluminum trim, sitting on a concrete slab so fast that I have I want to store food and ammunition storage, use and other products taken from home. Just to be clear, no weapons will be registered, only ammunition. It is waterproof and I was already planning on wall insulation. What material can be used on the walls, cover the insulation, my brother says to

Outdoor Storage Sheds