/diy/ - Do It Yourself

Shed build! First time really building anything. Have kind of an odd location for an odd shaped shed... Already built the floor and foundation. It will be L shaped, with the long section being tall (about 8 feet floor to rafters). The short section being more of a shelving area for gas cans and the like. The long section will be where the mower is parked. Overhead storage for things. Some space on walls. Door to long section will be a pull down ramp. Whole thing will be against a walk out basement wall. Part of the funky shape is to not block window. Will not be fixed to house, though may be caulked etc where siding of shed meets foundation wall. Have to put up the back wall first. For ventilation purposes I envisioned the back wall being bare studs, open to the foundation wall and the slight gap between. Do I need to do anything with the back wall since there won't be any OSB to stiffen it from torsional stresses?