How To Measure Roof Surface Area

That gives you 5 590 square feet which is the actual area of the surface of the roof.

How to measure roof surface area.

Place the other end of the level at the peak of the roof and hold it level. The length l times the height h of a triangle is twice its area a2. How to calculate roof surface for a roof incline of pitch x 12. This distance is the rise.

For an accurate surface area measurement you should make note of these additional structures. L 30 feet h 12 feet 30 12 2 180 square feet. This applies to lengths as well as areas. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

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. Using the table below lookup the pitch es and make a note of the number s in the multiplier column. 1 roof square 100 square feet.

This multiplier number will be used to multiply the surface area calculation that sketchandcalc will provide. And that s the number you were looking for. Measure the distance from the surface of the roof to the bottom of the level at the 12 inch mark. Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118.

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. Outside of the u s a degree angle is typically used. House surface plus the area with which the roof extends outside the house it can be calculated by multiplying the extension with the perimeter of the house. First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line.

To calculate the area of your roof first you ll need to calculate the pitch of it.