Lean To Shed Roof Pitch Calculator

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.

Lean to shed roof pitch calculator.

The minimum roof pitch for shedding snow is around 30 or a 6 12 or 7 12 slope although this is not a definite as the material of your roof the direction of the snow and wind are some factors that can affect whether or not snow will slide as roofs of as little as 10 have been reported to shed snow. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. A roof pitch that is based on a fixed rise and run and does not end up with a whole number is known as a bastard pitch. 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.

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. Roof pitch refers to the slope which the rafter creates. The roof pitch measures the steepness of your shed roof and typically takes values from 1 to 12. 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.

If your roof pitch is greater than 3 your roof is considered pitched read more about roof pitch at wikipedia.