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.
Sloped lean to shed roof pitch.
Roof pitch calculator is great for calculating the pitch of your shed roof.
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 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.
You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof.
The roof pitch measures the steepness of your shed roof and typically takes values from 1 to 12.
Furthermore a roof in a forest should have.
This means that for every 12 inches of horizontal distance across the shed the roof will rise 4 inches.
For example a shingle roof in a snowy region could be 2 12 but it is better to have a steeper pitch such as 12 12 or even steeper to shed the snow.
This slope works well for sheds that are fairly narrow like 4 to 6 feet but for sheds that are 8 or wider the shed roof becomes unsightly high.
Often you express roof pitch as the ratio between the rise and the run in the form of x 12.
Roof pitch refers to the slope which the rafter creates.
More modern tiling and felt shingle systems can achieve lower slopes down to about 20 degrees.
The roof is typically sloped down from the connecting wall if the shed is attached to the side of your house or garage.
This free roof pitch calculator will take your roof width see the picture and rise the height of the roof and will calculate the roof pitch both as numeric value.
Asphalt shingles typically have a minimum slope rating of 4 in 12.
A relatively steep pitch in excess of 40 degrees to be waterproof.
For slopes below 20 degrees systems such as epdm fibreglass metal roofing can be used.
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.
However if you choose to build a freestanding shed and use this style of roof you should plan the slope of your roof in such a manner as to slope down from the front to the back of the shed.
Remember roof pitch isn t just for aesthetics.