How To Measure Roof Surface Area

This distance is the rise.

How to measure roof surface area. Measure the distance from the surface of the roof to the bottom of the level at the 12 inch mark. Outside of the u s a degree angle is typically used. Climb to the top of your roof. And that s the number you were looking for.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. Next place your ladder against your house at the gable end. 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. 1 roof square 100 square feet.

This applies to lengths as well as areas. How to calculate roof surface for a roof incline of pitch x 12. First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line. For an accurate surface area measurement you should make note of these additional structures.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. That gives you 5 590 square feet which is the actual area of the surface of the roof. Mark a level 12 inches from one end. Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118.

Search with the roof area calculator. Place the other end of the level at the peak of the roof and hold it level. This multiplier number will be used to multiply the surface area calculation that sketchandcalc will provide. Using the table below lookup the pitch es and make a note of the number s in the multiplier column.

L 30 feet h 12 feet 30 12 2 180 square feet.