Pitch measurement method 1 1.
How to measure the square foot of a hip roof.
To find the square footage of a hip roof you just need to calculate the area of each of its faces.
Step 2 climb up to the roof and measure each face of the hip roof.
The length l times the height h of a triangle is twice its area a2.
If a section is 120 feet 37 m x 100 feet 30 m its total square footage would be 12 000 square feet 1 100 m 2.
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.
If you are trying to undertake this all yourself then you should really be looking for the most effective way of working out things like the hip roof square.
A hip roof s square footage is equal to that of a gable roof with the same dimensions.
For parallelogram shaped faces measure the length of the bottom edge of the roof length of the top edge the ridge and length from the ridge straight down to the bottom edge.
The result is the total square footage of your roof.
3 calculate the area of each roof face.
If for example the total square footage for the examples used so far would be 14 400 the rectangular plane plus 900 the triangle plus 2 000 the irregular shape 17 300 square feet.
The top ridge will be shorter than the one of the gable roof but the four hips will add to the ridge length.
L h 2 area calculating an area of a triangle when estimating a roof.
Have a helper hold the bottom of the ladder while you work from it to measure the roof.
The square footage of a hip roof area is identical to the square footage of a gable roof of the same size.
Be sure to find the area of any dormers on your roof as well.
Add the square footage for all the planes together.
The difference is in the amount of ridge capping you need and the amount you will waste.
Calculate the square footage area of a hip roof.
1 roof square 100 square feet.
Make a note of the square footage of each square or rectangular section on your diagram.
For this you ll use the same formula that you would use to find the area of an ordinary triangle or trapezoid.
8 inches and you have an 8 in 12 pitch.
The only difference in this calculation to the one for a gable roof area is the amount of the ridge.
If this distance measures 4 inches you have a 4 in 12 pitch.
Just multiply the length and width dimensions.
