If you order roof shingles solely based on the size of your roof, you’ll end up with much less than you need.
As starter shingles along the eaves of the roof, several bundles of extra shingles are required, particularly for large roofs. The primary function of starter shingles is to shed water that collects between the joints of roof shingles. You can also need additional rakes on occasion. Order extra shingles to use on ridges and hips if you’re making your own ridge caps.
Order 3-tab shingles to use as starter courses to save money, or use leftover shingles from previous roofing employment. Consult your roofing contractor for more details. Many people use starter course for the rake edges as well, in order to achieve a neat appearance. The rake edges of laminated shingles should not be used because they are too thick. To figure out how many starter courses you’ll need, count the roof’s edges and rakes and divide by three, which is the length of each shingle.
Since shingles must be cut to size, waste will be created and cannot be prevented. roofing contractors can cut shingles to fit around ridges, walls, valleys, chimneys, and other roof features, among other things. Some cut-offs can be reused, while others must be discarded because they are too thin.
The least amount of waste is produced by simple gable roofs. Plan 1% wastage in materials for basic roofs and 5% wastage in materials for complex roofs. Roofs with numerous hips, valleys, chimneys, skylights, dormers, and other vents are known as complex roofs.
The most waste is produced by 3-tab shingles, while laminated shingles are nearly as wasteful. However, since it is difficult to determine by what aspect the waste is minimised, it is preferable to purchase the same additional amount of shingles as you would with 3-tab shingles. You should inform the retailer that any additional unopened bundles will be returned. Since laminated shingles lack cutouts, you must simply seal them by pressing them down and nailing them.