A basic roofing design with only one slope is easier and less time consuming to work on for contractors and this translates into lower roofing construction costs.
Shed roof advantages and disadvantages.
Lots of built up snow adds extra weight to the roof that can also cause damage so shedding water and snow more efficiently is a definite advantage.
Yes shed roofs are cost effective options because of their simplicity.
A simple roof to construct but slightly more expensive than the skillion due to the lower slope needing waterproofing.
Since a shed roof generally has a much steeper slope it usually lets the water roll right down it and over the edge.
It does shed rain and snow shed more easily with the greater slope.
In the past people used shed roofs exclusively for their garden sheds and garages.
A metal roof is a 100 upgrade easy to repair.
It has a lower profile than the skillion or gable so may be more suitable to some neighborhoods.
Shingles have a lower initial cost.
Pooling water on a roof can cause leaks and other damage.