Beyond the standard flat roof or single sloped roof, the most common styles of shed roof are gable, gambrel, skillion, and salt box. each of these styles has their advantage both in design and construction. all of them make a good choice for your garden shed.. In this manner, you will get a rigid structure and a sturdy garden shed. you should study the building codes before starting the construction of the roof. there are certain cases in which you need to choose a certain slope for your roof, so make sure you are aware of the legal requirements, before starting the actual construction.. This step by step woodworking project is about free 6