My shed/summerhouse build will be around 3m by 4m give or take. if I build it with a single plane roof, or shed roof. Will this put considerable load on the lower wall holding up the roof. The shed will have treated wood base on concrete slabs. Will the structure hold up the roof and hold it all together? it will be 2.5m high, I'm just worried as it won't be dug into the ground so then I assume the structure will need to be self supporting. And I don't know how to be sure that it is.
Do i need to do anything to make it more solid, or will it be fine?