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. If you have sheathing, which is still exposed, this means it can be a suitable alternative to the measurement method. It allows for a fast calculation, and you can do it from your yard.
However, it is only suitable for roofs sheathed with 4-ft. Each of these structural panels will be 32 sq. If you are using three bundles to a square, calculating bundle numbers is simple. Each of your bundles can cover Therefore, order one bundle for every sheet of roof sheathing you have. With other bundle counts per square, divide the sheet number by three and come up with the number of squares you need to cover your roof.
You find this crude method works because three sheets of sheathing are roughly the size of one square sq. You have to account for starter shingle courses that run across your eaves and possibly the rakes. In your additional calculation, you also need to allow for cap hips and ridges. You also create waste once you begin cutting, and in the areas of rakes, walls, chimneys, and valleys, you do need to cut for an exact fit of the asphalt shingles.
Some cutoffs may be large enough for some of your starter shingles or other areas, yet most will be waste. Roofing contractors estimate projects and materials by the square, so it is crucial to find this measurement to estimate the amount of material needed accurately.
This is simply square feet of roof. To find the squares, divide the overall roof area by and then round up. For instance, if the roof is square feet, then it is 16 squares.
Although roofing projects are estimated and sold by the square, roofing material is often not sold in 1 square increments.
The average bundle of shingles covers Since transportation is a major cost factor, expect prices to vary by location. A typical bundle of shingles weighs about 75 pounds, while some premium products can weigh over pounds per bundle, so consider delivery of materials. Roofing felt is sold by the roll. The average roll of pound roofing felt covers about ft 2 , or 4 squares, while the average roll of pound roofing felt covers about ft 2 , or 2 squares. Consider other underlayment options as needed, such as rubber or tar products.
Nails will also be required for any roofing project. The average 3-tab shingle needs four nails per shingle. High wind areas and other types of shingles may need more. But the problem is, you may be too lazy to know how many shingles for each bundle. Well, you are not the only one.
It takes a different number to determine how many shingles in a bundle. The number depends on which bundle you are choosing. From our previous explanation, you know how many bundles of shingles in a square are, and it has three bundles per square. Now the question is different: how many shingles in a bundle? Per a common three-tab shingle bundle, you will have 29 shingles with standard size 12 in.
This means you will get 87 shingles if you buy a square of three-tab, standard-sized shingles. It may be a little confusing — kindly take your time to comprehend it as a whole. To count your need for shingles, as usual, you will need to know the width of your roof. If the roof consists of several planes, you can easily add the width.
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