How To Measure Roof Surface Area

Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118.

How to measure roof surface area.

Place the other end of the level at the peak of the roof and hold it level. Outside of the u s a degree angle is typically used. And that s the number you were looking for. The length l times the height h of a triangle is twice its area a2.

Next place your ladder against your house at the gable end. 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. Mark a level 12 inches from one end.

That gives you 5 590 square feet which is the actual area of the surface 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. How to calculate roof surface for a roof incline of pitch x 12. Search with the roof area calculator.

To calculate the area of your roof first you ll need to calculate the pitch of it. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Climb to the top of your roof. Measure the distance from the surface of the roof to the bottom of the level at the 12 inch mark.

In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. For an accurate surface area measurement you should make note of these additional structures. Using the table below lookup the pitch es and make a note of the number s in the multiplier column. This multiplier number will be used to multiply the surface area calculation that sketchandcalc will provide.

This distance is the rise.