A quarter inch slope is the lowest you would go with a metal roof experts recommend at least a half inch minimum to ensure a weatherproof interior for your shed.
Shed roof slope.
Here in the uk there is a limitation on the height of shed roofs when they are close to boundaries which many sheds are.
Unless of course you have a very steep pitch on your trusses or rafters.
If your roof pitch is greater than 3 your roof is considered pitched.
There are advantages and disadvantages to having a steep pitch versus a shallow or low pitch the most obvious of which is the roof s ability to shed or withstand heavy snow rain or wind.
2 the gambrel or barn style shed roof.
However the one very important consideration with any shed roof is building a roof with too low of a pitch.
The roof pitch measures the steepness of your shed roof and typically takes values from 1 to 12.
Read more about roof pitch at wikipedia.
The shed roof pitch has two slopes and the window above eaves level allows additional light into the shed.
The gable style pitched roof is not only one of the most common styles of shed.
The steeper the pitch though the harder it is to put shingles on.
An important factor to throw into a discussion about roof pitches is local planning rules and regulations.
Then you will have more storage.
Remember metal roofing is more expensive than shingles.
The flip side to this is that it also becomes more expensive to build both in materials and logistical difficulty.