For lots more information on which roof finish to use for which slope and indicative costs.
Sloped lean to shed roof pitch.
Lean to shed roofs develop an interesting problem as they get larger.
In other words if there is a 1 1 2 ridge board nailed into the wall and the width of the lean to is 96 then the run will be 94 1 2 96 1 1 2 94 1 2.
A 4 12 pitch is around 18 5 degrees but not exactly.
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.
A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible.
Once installed your lean to style shed can look like an extension of your home.
You can also divide the rise over run multiply by 100 and get a percentage.
A relatively steep pitch in excess of 40 degrees to be waterproof.
If the roof pitch is very steep at all then it will rise to a height that becomes unsightly.
Some may say it is ugly.
This model is also great for any yard with limited space.
The run for a lean to shed rafter ending into a wall should account for the ridge board nailed into the wall where the tops of the rafters rest into.
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.
This ugly design is most often avoided by installing a low slope roof to keep the rise of the roof at a minimum.
Thus a 4 12 pitch would be a 33 slope.
Stor mor s lean to or sidekick storage shed is built with a single sloped roof making it ideal for limited storage requirements.