How To Measure Square Footage Of A Flat Roof

How to calculate square feet of a roof.

How to measure square footage of a flat roof.

L h 2 area calculating an area of a triangle when estimating a roof. Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements. 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. 1 roof square 100 square feet.

The length l times the height h of a triangle is twice its area a2. To find the squares divide the overall roof area by 100 and then round up. 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. Next you will need to use a roofing materials calculator.

Climb to the top of your roof. Next place your ladder against your house at the gable end. This is simply 100 square feet of roof. If the house has an irregular shape measure each part separately figure the separate areas and add them together.

For instance if the roof is 1550 square feet then it is 16 squares. Convert the area to roofing squares. Include dormers the small outjuttings over attic windows. After that place your level against the gable trim and flat against the side of the house.

Check that your footage measurements are within this range so you can start off on the right foot. How to calculate your roof square footage first measure the length and width of each surface on the roof then multiply these values to get the square footage of that surface. A square simply refers to a 10 x 10 square of roofing. First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line.

Calculate each plane separately. Measure the length and width of every roof plane or surface. Because each 100 square feet of roof is one. Multiply the length and width of each square or rectangle shaped plane.

Simply input the surface area of the roof choose from one of the available options and you will get your first roofing estimate.