, How to Replace a Bathtub in a Small Bathroom, How to Install a Ring Doorbell on Vinyl Siding, How to Hang Christmas Lights Outside Without Nails. Roof A & Roof B dimensions will provide the total exposed roof areas (the hidden area is subtracted from the total). will add an arbitrary value for the difference in length due to the pitch . (For example, 40 feet x 30 feet = 1,200 square feet. Therefore, mark off 12 inches on the level and place it down horizontally against the roof rafter. Count how many different squares or areas you have. While it is possible to estimate the amount of necessary materials using only the total roof area measurement, as can be seen from the table, depending how large the pitch of … The same method is used for gable roofs. Calculating roofing material needs is a cinch with PlanSwift. Most roofing contractors typically measure a roof by calculating the area of a roof and then adding on 10% for possible waste. The area of a roof is figured in square feet. - our partener website, In this article, we will talk about calculating the roof surface starting from. Roof area calculation & measurement methods: Here we describe various methods for measuring all roof data: roof slope or pitch, rise, run, area, and other features. 1-877-246-4354, Website by the Prager Microsystems, Inc. Digital Marketing Agency. The first step in measuring the area of your roofis calculating the pitch: Use your measuring tape to measure our 12 inches on your large level and mark it at the 12-inch line. To get an approximate surface area we . and side which is the longer part is 27m or 90ft. Calculating the total roof surface area is a good final check after all the fine calculations have been completed. Each rise measurement is written as “# in 12” and this is your roof’s pitch. When roofing contractors are in high demand such as they are in Florida after a hurricane, this way of estimating a roof may be okay, but in a tighter market you may need to have sharper estimating skills in order to compete with your competitors and make a profit. Thus, a moderate “6 in 12” roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. This would yield 1/3.) There is a separate calculation at the right of the form for a simple "shed" roof. The latest batch of takeoff and estimating software programs on the market have made estimating roofing faster, easier and more accurate than ever before. How to calculate Roof surface For a roof incline of (pitch x/12): /12 The roof below is drawn in 1/8″ scale This means that, if using a regular tape measure that 1 inch would equal 8 feet. ROOF AREA First determine the area of the roof plan by multiplying the length of the roof by the width. To find the area of your hipped roof, simply multiply your plan area by the Roof Slope Factor for the roof area. To estimate how much energy could be generated from the sun on a surface, we first calculate the area to see how many solar panels could be placed on it. These have different areas because the roof lies on the hypotenuse of a triangle, whereas the area protected by it is horizontal.