Hi everyone want some advice please, I’m thinking of building a shed about 20ft x 12ft 8 ft high to have my sheep feed blown into, bags cost an extra £400 last year. Going for steel uprights and beams, timber purlins and tin roof. Plenty on air vents. Concrete floor only thing is what should I use on sides? Will tin sheets be ok? My thinking is a lot of grain sheds have steel sides as do silos. Will my rolls get damp? Only going to have feed in it nothing else.