Building this single sloped roof shed was an excellent learning experience. preplanning was essential to the build. preplanning was essential to the build. the shed style allowed more windows near the high wall roofline which adds a lot of light.. In this official shed building guide of 2018: "how to build a shed in a week or less" we're going to cover the main & most important building steps of one of our premium 10x16 gable storage shed. we'll use this particular project as an example (keep that in mind).. To speed up the assembly process, build all the trusses on the shed floor before erecting the walls. start by cutting all the rafters to length with a 40