How To Determine Roof Size For Shingles

Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used.

How to determine roof size for shingles.

To measure for roofing shingles start by calculating the area of each plane or section of the roof. Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. 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. You will need to express this size in terms of square feet.

Don t use this as your only method of measuring. The first step in a free roofing estimate is measuring the roof dimensions. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Outside of the u s a degree angle is typically used.

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. 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. It should have a curved roof. Next divide your total area by 100 to calculate the number of roofing squares you ll need to buy.

How you get shingles. Just use it as a starting point and you ll have a fairly basic idea of what you re dealing. A mobile home roof should not be flat. 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 should use rolled roofing on a flat roof over lap 1 2 the width of the rolled roofing. 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. Before you start the calculation you need to be aware that shingles are sold by the square and by the bundle. The dead air space between the metal roof and shingle roof will work as a barrier to dissipate heat.

A square of shingles will be the amount needed to cover an area of 100.