How To Determine Roof Size For Shingles

To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof the calculator above can handle all of this simply enter the length width and pitch and it will determine the size of the roof in squares.

How to determine roof size for shingles.

How you get shingles. The first step in a free roofing estimate is measuring the roof dimensions. Just use it as a starting point and you ll have a fairly basic idea of what you re dealing. Don t use this as your only method of measuring.

To measure for roofing shingles start by calculating the area of each plane or section of the roof. Note that in the last 3 4 years costs of roof shingles and many accessories have gone down by an average of 18 20 currently the us national average for benchmark architectural shingles is around 74 51 square or 25 per bundle. A square of shingles will be the amount needed to cover an area of 100. Before you start the calculation you need to be aware that shingles are sold by the square and by the bundle.

For example you may need to pay double the cost in asphalt shingles if your roof has a 12 12 pitch a rise of 12 inches 30 cm per 1 foot 0 30 m as opposed to a 4 12 pitch. Calculate your roof pitch to determine how steeply your roof slopes. Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. Keep in mind that using google earth isn t going to give you a 100 percent accurate reading but it will give you a basic idea of the size of the roof for your calculations for the roofing materials.

You should use rolled roofing on a flat roof over lap 1 2 the width of the rolled roofing. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. It should have a curved roof. Of course there are some measurements which will need to be taken before you are able to calculate the number of roof shingles that you need.

Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure. You will need to express this size in terms of square feet. A mobile home roof should not be flat. Next divide your total area by 100 to calculate the number of roofing squares you ll need to buy.

Outside of the u s a degree angle is typically used.