Calculating roof area

How do you calculate the square footage of a roof? How to calculate square feet of a roof? The calculated area is only an estimation. In cases where a roof has a complex shape, such as in the image to the right, measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area. Pitch Measurement Method 1. Square the result of Step 1. Add then take the square root.

Area is defined as the expanse or measurement of a given surface, and there are a few methods for measuring your roof ’s area. Our roof calculator uses “base length” and “base width” to find the estimated area. The base width is the distance from one corner of your roof to the other, at its base, on the short side of your house. After that, just plug in the corresponding factor.

You need only a level and a tape measure to find the rise of your roof. Note the area of 77ft that needs to be subtracted for the recessed area. Once the “footprint” including overhang areas have been determined for each area, find the appropriate slope or pitch factor in the chart below.

The length (l) times the height (h) of a triangle is twice its area (A2). You want a roof area calculator that provides accurate estimates to help you order materials such as shingles, membrane, roofing, or ceramic tile. So if you divide your answer of a product of length times height by two, you will get the area of a triangle.

Install Roof Shingles. Determine the area protected by the sloping roof by multiplying the length of the roof by the width. Area is a quantity that describes the size or extent of a two-dimensional figure or shape in a plane. It can be visualized as the amount of paint that would be necessary to cover a surface, and is the two-dimensional counterpart of the one-dimensional length of a curve, and three-dimensional volume of a solid.

Next, square your result. Extend your tape measure along the outer edges of the roof to find its length and width in feet. For sloped sectional roofs, write down the dimensions of each individual plane. For square or rectangular roofs, you’ll only need to record the length and width.

Once you have these measurements, you will need to calculate the area of the roof and then you can see how many shingles you will need. The Shingle Count Method Of the old shingles have not been removed from the roof , you can easily use this method to calculate the number of shingles you are going to need. Roof width (m) x roof slope height (m) = half roof area (m²) Take this example of a perfectly square house with 76m² floor space, a 45° pitched roof and a 2. The roof slope height is 6. Roof Area calculator. To accurately calculate the area of your roof , you must first determine its slope, or pitch. Roof pitches are described in terms of rise and run.

This will provide an area calculation for clay or concrete roof tile, natural or composite slate, underfelt or breathable felt and ridge length. Find the length and width of the building’s exterior walls. Stretch your tape measure along the walls from end to end. The pitch is the steepness of the roof.

To find the pitch of your roof, you’ll first. Calculate the pitch of the roof. That gives you 5square feet, which is the actual area of the surface of the roof. And that’s the number you were looking for.

Hip roof is a roof with a sharp edge or edges from the ridge to the eaves where the two sides meet. Here is the online hip roof area calculator which helps you calculate the hip roof parameters such as roof rise, common and hip rafters length and roof area based on width, height of roof base and the roof pitch (identical for all sides). As long as you keep in mind that these are only the most basic of guidelines, you’re going to be okay in your calculations.

Video on how to do this. To do that, you need to accurately calculate the area of your roof. Gather some basic weather information to calculate the proper size for gutters and downspouts for a house. The total rainfall and how rapidly it falls will affect the runoff from the roof. An inch of rain is not much, but it if falls in half an hour it could flood a gutter.

All these tools are free and we hope - easy and intuitive to use. Let Owens Corning Roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic, with our 4-step ventilation calculator. Where an angle occurs in a length of gutter served by two outlets, the reduction factor of 0. Measure the length and width of each portion of the roof, multiply length by width for each plane, and then add the planes together for the total square footage. If you have a simple gable roof, you’ll only need to measure and sum up the planes of the roof.

Total roof area also affects runoff. Use our roof pitch calculator to find the pitch of your roof. Enter an address or zoom into the map then click on the starting point of your shape.

As you add points the area will be updated below and converted into acres, square feet, meter, kilometers and miles. Continue to click along the outside edge of the shape you want to calculate the area of. It will also show the perimeter of the shape.