How To Determine Roof Size For Shingles

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.

How to determine roof size for shingles.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. A mobile home roof should not be flat. Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used. Calculate your roof pitch to determine how steeply your roof slopes.

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. Outside of the u s a degree angle is typically used. Don t use this as your only method of measuring. Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry.

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. Just use it as a starting point and you ll have a fairly basic idea of what you re dealing. 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.

You should use rolled roofing on a flat roof over lap 1 2 the width of the rolled roofing. It should have a curved roof. 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. Before you start the calculation you need to be aware that shingles are sold by the square and by the bundle.

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. Next divide your total area by 100 to calculate the number of roofing squares you ll need to buy. The first step in a free roofing estimate is measuring the roof dimensions. To measure for roofing shingles start by calculating the area of each plane or section of the roof.

How you get shingles.