For example a 4 12 pitch roof that is 100 square feet.
Roof pitch multiplier chart.
Let s see how this works in a specific example.
Determine how many square feet of roof area a building has by measuring from the ground.
The pitch of this roof is 4 8 12.
48 10 4 8.
Roof pitch area multipliers.
We included a roof pitch chart below the 7 12 example image and the calculator below that.
Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter.
Roof pitch multiplier c over b the chart gives a number of roof pitch multipliers for different roof slopes.
A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by the area covered by a sloped roof to produce the area of the actual surface of the roof.
How to find your what roof pitch category.
Measure with a speed square.
Now divide the rise by the multiplier to get the pitch eg.
Roof pitch multiplier chart.
A speed square and level can be used to easily find the pitch of a roof.
Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.
Accurate roof calculations are achieved using this table and all you need to do is measure the roof width and length and then you are ready to do a roof pitch measurement.
This roof pitch table displays a multiplier for adding for different roof pitches.
Image 1 12 to 12 12 roof pitch 7 12 pitch.
If you know the pitch of a roof you can use the numbers in the following pitch table to do the following.
For example if you measure 4 inches the pitch of your roof is 4 12.
Just multiply the roof width by roof length and then the result should be multiplied by the use of the pitch multiplier.
This will give you the rise over run or pitch.
The roof pitch multiplier is the length of the hypotenuse divided by the run.
Roof pitch degree table.
Use our roof pitch calculator to find the pitch of your roof.
Set the level on the edge of the speed square as shown below then.
Typically the steeper the roof is the higher the price will be.
The calculator above can handle much of this math.
If this isn t practical then perform the same measurement on the underside of the roof.
The pitch of the roof is the rise over a 12 inch run.
Roof pitch how much to add.
100 1 054 105 4ft 2.
A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof.
The maths behind this number is that it is the square root of rise run 2 1.
