How To Measure Roof Surface Area

This multiplier number will be used to multiply the surface area calculation that sketchandcalc will provide.

How to measure roof surface area.

Next place your ladder against your house at the gable end. And that s the number you were looking for. Using the table below lookup the pitch es and make a note of the number s in the multiplier column. Place the other end of the level at the peak of the roof and hold it level.

How to calculate roof surface for a roof incline of pitch x 12. The length l times the height h of a triangle is twice its area a2. 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. Mark a level 12 inches from one end.

Search with the roof area calculator. To calculate the area of your roof first you ll need to calculate the pitch of it. Climb to the top of your roof. That gives you 5 590 square feet which is the actual area of the surface of the roof.

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. 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. 1 roof square 100 square feet.

This applies to lengths as well as areas. 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. Outside of the u s a degree angle is typically used.

First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line.