How To Determine Roof Size For Shingles

A mobile home roof should not be flat.

How to determine roof size for shingles.

Outside of the u s a degree angle is typically used. A square of shingles will be the amount needed to cover an area of 100. The first step in a free roofing estimate is measuring the roof dimensions. If you are going to use shingles build a pitched roof over the mobile home.

Next divide your total area by 100 to calculate the number of roofing squares you ll need to buy. 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. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Just use it as a starting point and you ll have a fairly basic idea of what you re dealing.

You will need to express this size in terms of square feet. 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. 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. 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.

Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. Before you start the calculation you need to be aware that shingles are sold by the square and by the bundle. It should have a curved roof. Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used.

The dead air space between the metal roof and shingle roof will work as a barrier to dissipate heat. Don t use this as your only method of measuring. You should use rolled roofing on a flat roof over lap 1 2 the width of the rolled roofing. 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.