Experts recommend that a pitch measurement is taken before using a roof area calculator.Don’t have time to read? The Basic Element List will give you the area of the roof surface, not the 'Area on Plan', like the Element Information will. Fortunately, if you know the roof’s pitch, or have access to the home’s attic to measure its incline you can arrive at an accurate roof area calculation using SketchAndCalc™. Sometimes it is easier to calculate the area by summing up the areas of smaller parts. There are different methods available to calculate roof area. The roof pitch conversion factor is a number that, when multiplied by the area covered by the roof, gives an estimate the total surface area of the sloped roof itself. This will provide an area calculation for clay or concrete roof tile, natural or composite slate, underfelt or breathable felt and ridge length. Watch this short video titled Area of a roof instead. How to Calculate Your Roof Area. Let’s Get Calculating. This calculation option will also give you a very accurate result. It is necessary to take into account how the overhang will be located - along the perimeter, with a closed parapet or with a lower overhang and a triangular parapet. For example, if the wall is 25 feet wide and the eaves are 20 feet above ground level, the wall has a surface area of 500 square feet: 25 x 20 = 500. This is expressed in terms of how many inches the roof rises for … Roof slope, pitch, rise, run, area calculation methods: here we explain and include examples of simple calculations and also examples of using the Tangent function to tell us the roof slope or angle, the rise and run of a roof, the distance under the ridge to the attic floor, and how wide we can build an attic room and still have decent head-room. - 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). The roof slope height is 6.98m. Given pitch and a horizontal area measurement, multiply the horizontal area by a correction factor corresponding to pitch, provided in the table below, to determine the actual area of the roof to … Privacy Policy • Terms and Conditions • Cookie Policy, SketchAndCalc uses cookies to ensure you get the best experience. Roof Pitch Area Multipliers This gives you ⅓) Square the answer you calculated before. So if you divide your answer of a product of length times height by two, you will get the area of a triangle. Roof pitch is the measurement of a roof's vertical rise divided by its horizontal run. And that’s the number you were looking for. Knowing how to estimate roofing materials is important. Take the area of the roof’s footprint, say it's 5,000 square feet, and multiply 5,000 by 1.118. Gable & Hip Roofs will have the same area provided that the pitch remains the same. This is the first thing to do when you set out to calculate the area of your roof. Determine the roof area by using a mathematical formula that accounts for the roof length, total span, and roof pitch: Determine your roof pitch by using a pitch gauge (available at most home improvement stores) or a smartphone app (available free through any app store). The rise is the distance from the top of a stud wall to the peak of the roof. Roof pitch is a determining factor for cost of the roof, as well as the roof area, and the type of materials used. First, you need to know two specific values in order to calculate the area of a roof: (1) the area of the roof in plan view and (2) the angle of the roof pitch. The only difference in this calculation to the one for a Gable roof area is the amount of the Ridge. Roof pitch affects the actual area of the roof. The effect of the roof slope is allowed for by entering the angle of the roof in the programs. 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