How To Figure Out How Much Roofing You Need

If your roof has dormers hips or other complex elements don t forget step 2 determine the total number of squares.

How to figure out how much roofing you need.

Enter square footage calculate or enter the square footage of the attic or area to be vented. 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. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.

Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material. 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. Divide the total footage by 100 to determine. Roof length measured in feet roof width measured in feet roof pitch.

Outside of the u s a degree angle is typically used. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. Determine the length of the metal panels needed for one side of your roof by measuring from the fascia board the board attached to your roof joists to the ridge the peak of the roof. Step 1 find the square footage of the roof.

For example your roof could measure 12 feet to its peak. Roof type either gable or hip using these four inputs you will get several basic outputs. This number will tell you the total length of metal panels needed. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. It is often compared to slope but is not exactly the same. Measure the length and width of each portion of the roof multiply length by width for each plane and then add the planes together for the total square footage 1 x research source if you have a simple gable roof you ll only need to measure and sum up the 2 planes of the roof. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

To accurately calculate the area of your roof you must first determine its slope or pitch. With that as background you are now ready to estimate how many shingles you will purchase for your roof project. The first step in a free roofing estimate is measuring the roof dimensions. Approximate price in dollars.

Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.