How To Figure How Much Roofing You Need

Based on your 1100 sq.

How to figure how much roofing you need.

Enter the diameter of the roof ridge vent gap 1 3 finally enter the coverage area width of the panels you plan to buy. Measuring the amount of metal roofing you need is accomplished in various ways depending upon the style of your roof. And this guideline you ll need a minimum of. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

You can determine how much metal you will need for your roof. Use 1 4 for up to a 9 12 pitch. The first step in a free roofing estimate is measuring the roof dimensions. This correction factor will take into account the greater area of the roof due to the pitch.

We plan to enable the use of fractions at a later time. Calculate sheathing needed once you have the area you can divide by the area of a sheet of plywood to find the number of sheets needed. So dividing the area of the roof by 32 will give you the number of sheets needed. For example if your roof has valleys and dormers that will change the way you measure it.

You will need to express this size in terms of square feet. 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. How to figure metal roofing to use this panel length calculator enter whole numbers and decimals only. Near ridge of the roof.

1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. To accurately calculate the area of your roof you must first determine its slope or pitch. For roof pitches of 5 12 to 7 12 use a factor of 1 3.

If your roof pitch is 3 12 or 4 12 multiply by 1 25. A 4 8 sheet of plywood is 32 ft 2. 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.