For lots more information on which roof finish to use for which slope and indicative costs.
Sloped lean to shed roof pitch.
Thus a 4 12 pitch would be a 33 slope.
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.
This model is also great for any yard with limited space.
Stor mor s lean to or sidekick storage shed is built with a single sloped roof making it ideal for limited storage requirements.
Featuring all four walls this shed is designed to be built up against a house or fence.
This ugly design is most often avoided by installing a low slope roof to keep the rise of the roof at a minimum.
Lean to shed roofs develop an interesting problem as they get larger.
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.
Once installed your lean to style shed can look like an extension of your home.
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 4 12 pitch is around 18 5 degrees but not exactly.
A relatively steep pitch in excess of 40 degrees to be waterproof.
More modern tiling and felt shingle systems can achieve lower slopes down to about 20 degrees.
A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible.
Some may say it is ugly.
You can also divide the rise over run multiply by 100 and get a percentage.