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.
How do satellite roof measurements determine pitch.
On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof.
You can t exactly get a ruler out to do it and guessing is just going to be suicidal in terms of the end product so if you are trying to learn how to determine roof pitch measurements you really do.
Roof pitch refers to the slope which the rafter creates.
It s pretty self explanatory after that.
Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.
You ll need to figure out the vertical distance also known as the rise over a 12 horizontal segment also known as the run.
Roof pitch is used to describe the slope or angle of the roof.
The slope is the same as the pitch.
Record these values as roof rise over run with the vertical measurement listed first and the horizontal second.
Depending whether the roof area is measured horizontally possibly from a drawing or photograph a correction factor is necessary to determine the actual area of the roof.
Divide the slope by two to get the pitch.
Given pitch and a horizontal area measurement multiply the horizontal area by a correction factor corresponding to pitch provided in the table below to determine the actual area of the roof to be used in the roofing material calculator.
Often you express roof pitch as the ratio between the rise and the run in the form of x 12.
The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.
Google earth pro was the paid version of google earth it used to.
This can make it even safer to do your measuring and it also removes a level of guessing to your calculation.
If the angle changes too much when you zoom in go to view at the top left then click on reset at the bottom of the drop down menu then click tilt.
For a roof with the ridge above one wall the span is the same as the run.
For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.
The first thing you need to do is download and install google earth pro.
If this distance measures 4 inches you have a 4 in 12 pitch.
Use one of these three methods below to calculate your roof s pitch.
And even flat roofs usually have a little bit of a slope so you might want to use a roof pitch multiplier once you have your area figured out 1.
If you are trying to learn how to measure roof pitch calculations accurately you should really consider the importance of using a calculator.
You ll need a level and a tape measure or ruler.
Mark a spot on the level 12 inches from one end.
The next step is to measure the pitch also referred to as the roof slope of the roof deck.
Pitch measurement method 1.
8 inches and you have an 8 in 12 pitch.
Zoom in on the roof then select tools at the top left then select ruler.
