If you are lucky enough to have a simple roof, say a gabled roof with two identical sides or even a single sloping roof, then calculating your roof area will be a breeze.
The easiest method to figure your square footage is to estimate using the exposed roof sheathing. But if you are completely removing your old roofing or completing a new build, then this method works for you.
Thus, the square footage of one piece is 32 feet squared. Count up all the sheets on all sides of your roof. Add them up. Then account for half or quarter pieces on the edges and roughly add them up to make complete pieces.
Another way to measure the square footage of your roof from the ground is to calculate the number of shingles — or tabs — to calculate the square footage of the roof.
This technique works best with standard, 3-tab shingles since each tab has a uniform length and width. To find the length of the roof, count the tabs starting at one end to the other.
Next, count the number of tabs from the gutter to the roof peak. This answer will tell you the width of your roof. Then multiply the length and width for the square footage of one side of your roof. Multiply times 2 for the total square footage. This method also works with a hip-style roof. Remember that the square footage of a triangle is measuring the base times height, then dividing that number by two. Calculating either side of the hip roof is trickier, but one method is to measure the top and the bottom, then take the median of that number before you multiply by the width of the roof.
If your roof is L-shaped or a more complex shape, then you might consider another method, such as getting up on your roof and measuring each section yourself. However, the vast majority of shingles require only 3 bundles per square feet. Shingles with 4 bundles per square will require you to purchase bundles for a square foot roof.
Once you have the square footage, divide that number by This will tell you how many roofing squares you have. At the very least, using a shingle calculator can help you check your calculations.
If you have a roof that has more faces than just two rectangles, a shingle bundle calculator will be more accurate and could save you money and time, ensuring you buy only the amount of shingles you need. Therefore the length of one side of the roof is The pitch of this roof is Add a foot of overhang and you get 6.
Multiply this by Multiply the two and you get Multiply that number times two and you get square feet — your total roof area. Now you need to find out how many bundles of shingles is required for square feet of roofing. Divide by to find out how many squares of roofing you have.
This equals 1. We know that each square of roofing requires 3 bundles of shingles, so 3 bundles of shingles times 1. You still have. It would be prudent to purchase one extra bundle of shingles to ensure you cover your entire area and to replace any damaged shingles in the future. The roof pitch is , which means the width of the roof is about Add 1. The total roof area is square feet. Multiply 7. The number of bundles per pallet depends on the weight and size of individual shingles.
In most cases, there are between 33 and 42 bundles per pallet. Architectural laminated shingles are bulkier and physically larger; therefore, these pallets will have fewer bundles than 3-tab shingles. A bundle of shingles weighs anywhere from 60 to 80 pounds. Most bundles are in the pound range.
A bundle must be light enough to be handled by your average-sized adult. Therefore, you will not find bundles that way anywhere beyond 80 pounds. Very thick laminated architectural shingle bundles may weigh less if it requires 4 bundles to make a square of roofing. It takes a square of shingles to cover sq. Shingles come pre-packed in either paper or plastic-wrapped bundles, and they design them to be an ideal weight for one person to carry.
Using this method, if you opt for heavier duty shingles such as you may need in high wind areas, you will need more bundles per square, because of the weight. The most common you find apply to three-tab shingles and take three bundles of shingles for each square. It can also include some of the lighter weight laminated shingles.
Once you look at the more substantial three-tabbed variety, these require four per square and sometimes possibly five to cover the same square. Once you have a three-bundle pack to cover a square, you will have 29 x 12 inches by inch standard-sized shingles per bundle. The hardest part is how you determine the number of bundles it requires you to order to cover all your roof areas.
You will find two methods to calculate your roof size and comprise the measurement method and the sheet-count method. You can find a less common method used for when you calculate bundles for shingles, which will lie over old shingles. Once you have these measurements, you need to allow for wastage, your starter shingles, and the extra you need for hip and ridge caps. Here is a breakdown of the calculation methods to determine the total square footage of your roof. The most accurate calculation of the number of shingle bundles needed is climbing up to the roof and measuring each roof plane on the roof.
If all roof planes are rectangular, you can quickly multiply their length by the width of each plane. Add them together, and you have your square footage for the whole roof. It does become more difficult when you have a complicated roof, and the planes are of different sizes.
Measure the length of the building and estimate the possible overhang of the rake edge. For widths, climb up a ladder and measure from the roof ridge to the eaves with a rigid tape. But slate, tile, and metal are all good options, too, provided you plan on being in the same house for a long time.
The vast majority of roof shingle bundles weigh between 50 and 80 lbs. Architectural style shingles generally weigh 65 to 80 lbs. Remember, the roof will be bigger than the footprint of the shed itself. You should still be ok with 2 sq, but take the measurement of your actual planned roof, not the shed floor.
Save my name, email, and website in this browser for the next time I comment. Press ESC to close. How many bundles of shingles do I need for square feet? Wikipedikia Editors 7 Min Read. Table of Contents.
Shingles are sold by the bundle and by the square, depending on the needs of the buyer. Size your shingles appropriately. Lay a starting row at the bottom of the roof along the edge. Lay the first row of shingles directly covering the narrow starter row. Lay the second row of shingles. Shingle around stacks, vents and chimneys as necessary. Show Comments. Leave a Reply Cancel reply. Share Article:.
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