In part three of our series, senior editor justin fink frames our garden shed's roof.. This post of building a roof for a shed have 4 attachments including how to build a storage shed, for more free shed plans here is a list, curbstone valley farm, build a garden shed - roof framing - youtube, then fasten top plate to wall.. 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..