How to calculate square feet of a roof.
How to measure square footage of a flat roof.
This is simply 100 square feet of roof.
Convert the area to roofing squares.
Climb to the top of your roof.
Simply input the surface area of the roof choose from one of the available options and you will get your first roofing estimate.
A square simply refers to a 10 x 10 square of roofing.
1 roof square 100 square feet.
Because each 100 square feet of roof is one.
Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.
If the house has an irregular shape measure each part separately figure the separate areas and add them together.
Calculate each plane separately.
Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements.
Next place your ladder against your house at the gable end.
If its pitch is 6 in 12 a pitch multiplier of 1 12 multiplying 1 152 sq ft 107 0 m 2 by 1 12 would give you an overall square footage of 1 290 square feet 120 m 2.
L h 2 area calculating an area of a triangle when estimating a roof.
To find the squares divide the overall roof area by 100 and then round up.
First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line.
For instance if the roof is 1550 square feet then it is 16 squares.
After that place your level against the gable trim and flat against the side of the house.
Include dormers the small outjuttings over attic windows.
Flat roofs if your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width.
Multiply the length and width of each square or rectangle shaped plane.
Next you will need to use a roofing materials calculator.
If your roof measures 48 feet 15 m x 24 feet 7 3 m multiplying its length by its width would give you a square footage of 1 152 square feet 107 0 m 2.
So if you divide your answer of a product of length times height by two you will get the area of a triangle.
Measure the length and width of every roof plane or surface.
