The term pitch refers to the slope of the roof.
Slope for woodshed roof.
When you see this detail below it is referring to the pitch of the roof.
At the same time the folded roof may vary in the slant from eighteen degrees.
Traditional roofing materials such as traditional clay tiles and timber shakes shingles need a relatively steep pitch in excess of 40 degrees to be waterproof.
A 4 12 pitch is around 18 5 degrees but not exactly.
Some builders even choose to match it directly especially if the shed s roof is attached to the house on the high side and just one simple span pitch.
More modern tiling and felt shingle systems can achieve lower slopes down to about 20 degrees.
One thing you never want to do when designing your roof is build one with a pitch lower than 3 12.
In order to adhere to standardized building codes and ensure adequate runoff your shed s roof must have a pitch of at least 3 12 read as three in twelve.
Three important considerations for building a shed roof roof pitch.
This means that for every horizontal run of 12 you need at least 3 of rise.
For slopes below 20 degrees systems such as epdm fibreglass metal roofing can be used.
Another widely used method is to follow the house s roof pitch on one side building the ridge off center then sloping down more drastically on the shorter side which will be closer to the house.
The coating material for a slanted shed roof can be varied.
Each item has a feature as well as the slanted roof angle.
You can also divide the rise over run multiply by 100 and get a percentage.
However rise over run is more efficient and easier to understand for the average diyer.
Beyond that you re free to choose whatever slope best fits your plans for your shed.
Thus a 4 12 pitch would be a 33 slope.