The length l times the height h of a triangle is twice its area a2.
How to measure the area of your roof.
Measuring your roof from the ground 1.
Use a pitch.
To calculate the area of your roof first you ll need to calculate the pitch of it.
And for a roof with a slope of 6 12 that number 1 118 is your roof slope multiplier.
Therefore mark off 12 inches on the level and place it down horizontally against the roof rafter.
That gives you 5 590 square feet which is the actual area of the surface of the roof.
Y 6 meters from ceiling to ceiling where the roof sides meet.
Front of the roof 12 x 6 72 square meters m.
Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118.
Some homes will have roofs with multiple pitches.
To find the pitch of your roof you ll first.
To calculate the roof area if you have a seat roof.
Next place your ladder against your house at the gable end.
Climb to the top of your roof.
The highest point of a roof.
L 30 feet h 12 feet 30 12 2 180 square feet.
It will also give you the perimeter of the shape of the roof.
Divide the area you calculated in step 4 by 100.
The answer to this is the total number of squares on your roof for which you need to purchase shingles.
Next measure vertically from the 12 inch mark on the level straight up to the underside of the rafter as illustrated below.
So if you divide your answer of a product of length times height by two you will get the area of a triangle.
1 roof square 100 square feet.
After you ve done this you can click along the outer edge of the roof that you wish to calculate the area for.
Back of the roof 12 x 6 72 square meters m.
Find the length and width of the building s exterior walls.
The pitch is the steepness of the roof.
First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line.
If this distance measures 4 inches you have a 4 in 12 pitch.
Measure the width and length of each side of the roof.
And that s the number you were looking for.
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.
Calculate the pitch of the roof.
X ceiling width 12 meters.
Stretch your tape measure along the walls from end to end.
Each time you add points the area will update and there is a box below that will convert this into acres meters kilometers miles and finally square feet.
8 inches and you have an 8 in 12 pitch.
