A barge rafter at the side of the gable step 2 position a level against the underside of the rafter.
How to work out the pitch of your roof.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
If you re thinking about replacing your roof with a new one you will need a roof truss calculator.
Step 1 access a rafter.
First enter the value of the rise and choose the unit of measurement from the drop down menu.
Place one end of a carpenter s level against the underside of the.
Measuring from the underside of the roof is usually the most accurate way to find the slope since there is no roofing material to make an uneven surface.
Take your pitch percent and press shift maybe 2nd function on your calculator then press tan and than equals most smartphone calculators have a scientific option in the settings.
To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.
Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m.
Finally enter the value of the rafter length and.
For example if the roof rises 4 feet and the span is 16 feet twice the run then the pitch is 4 16 or 1 4.
Measure the rise of your roof.
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 this will be the rise.
Even if you want to use a flat roof pitch calculator system you will be able to find one.
First measure 12 inches from one end of the level and make a mark.
Calculate the rafter length substituting these values into the following formula.
Any of the following will give you a good measurement 1 x research source a rafter in the attic.
Then enter the value of the run and choose the unit of measurement from the drop down menu.
Divide the height of your roof by the width not the full width if you ve measured the full width wall to wall divide this by 2 first h w to get your pitch as a percent.
One method to find the pitch is to climb on the roof and measure the rise for a 12 run.
You ll need a level that is 12 or longer and a tape measure.
Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.
Here s an easy safe way to determine the pitch from inside your attic.
If you want to know how to find the pitch of a roof then start with a calculator.
Calculate the roof pitch as the proportion of rise and run.
Pitch rise run 1 5 6 25.
This online truss calculator will determine the all in cost of your truss based on key inputs related to the pitch width and overhang of your roof.
The overhang of a rafter at the end of the roof.
Let s say it is equal to 1 5 m.
Outside of the u s a degree angle is typically used.
Pitch is the incline of the roof represented as the ratio of rise to the span twice the run.
