Pitch Of Roof Question

The pitch of a roof is its vertical rise over its horizontal span.

Pitch of roof question.

Most people interested in roof pitch are actually measuring the slope which is the most useful measurement when considering roofing material and rainwater. Even carpenters often use the terms slope and pitch interchangeably. So we ended up matching the porch pitch roof with the rest of the house it looks so much better has a better flow. However most often a ratio of pitch also fraction is slang used for the more useful slope of rise over run of just one side half the span of a dual pitched roof.

The original plans called for the main roof to be 7 12 with the bonus room dormer 4 12. If a roof increases in height by four inches for every foot of horizontal run it is considered to have a 4 in 12 pitch or just a 4 pitch talk in terms of pitches and you will always be understood in the roofing universe. The pitch of a roof is nothing more than a ratio that indicates how much rise there is in the roof over a 12 unit horizontal distance. And matching the roofing component with the shingles metal or whatever you have is more asthetical pleasing to the eye than switching up the roof matter on the porch.

How to calculate pitch. So the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. Slope is the correct term for the ratio of vertical to horizontal distance on a particular plane of the roof. For every 12 horizontal feet the roof changes 5 feet in vertical height.