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how to find the pitch of a roof formula. It is often compared to slope but is not exactly the same. Roof pitch is the measurement of a roofs vertical rise divided by its horizontal run.
The roof Pitch or roof slope will affect the interior volume of a building the drainage the style and the covering material of roof. Calculate the roof pitch as the proportion of rise and run. To measure the roof pitch youll need an 18- or 24-inch level a tape measure and a pencil.
See the image below for more explanation on rise run and pitch.
Roof Pitch Calculator Results Explained. We want the PITCH in the form x12. On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.