How Do I Get The Square Footage Of My Roof

The number you get will be an accurate estimate of how much area you have to cover for your roofing project.

How do i get the square footage of my roof.

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. Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements. Multiply the number of roofing squares for a medium pitch roof by 1 12 to 1 25 or by 1 3 to 1 42 for a high pitch roof to get the square roof area. A square simply refers to a 10 x 10 square of roofing.

Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. However shingles are packaged in a way that they are light enough for the average person to carry around. For instance if the roof is 1550 square feet then it is 16 squares. Divide any irregularly shaped areas of the roof into more manageable triangles and rectangles then calculate square footage for those individual elements and add them to get the total square footage.

Multiply the area by the pitch multiplier to get the roof s square footage. As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles. If your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width. Each time you add points the area will update and there is a box below that will convert this into acres meters kilometers miles and finally square feet.

It will also give you the perimeter of the shape of the roof. First multiply the length by the width. After you ve done this you can click along the outer edge of the roof that you wish to calculate the area for. Then take the product of these two dimensions and multiply it by your pitch multiplier.

The calculator cannot account for complex shapes based on a measurement of square footage alone. To find the squares divide the overall roof area by 100 and then round up. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.