Professional roofing contractors typically provide estimates of materials needed for roofing, including the number of shingles needed. Simple geometric calculations can provide a rough estimate.
Know MoreMultiple the length times width for every flat surface on your roof, including dormers. Add together all the totals to get the total square footage.
Shingles are sold in "squares," which are 100 square foot sections of roofing. Unless you are applying shingles directly to an already existing asphalt roof, you probably also need the same amount of underlayment. Divide the roof's total square footage by 100 to determine the number of squares of shingles needed.
Add 10 percent to your total to make sure you have enough shingles for trim.
In order to install roofing valleys, first create nail and guide lines, then attach the left side of shingles, attach the right side of shingles, cut off the corners of the right side and seal the edges with roof cement. Place nails 6 inches away from the center of the valley during installation.
Full Answer >Roofing estimates are determined by the cost of materials, how accessible the roof is, the size of the roof and its pitch. Before hiring a roofing contractor or company, one should first check to make sure the contractor or company is currently licensed and insured.
Full Answer >A roofing estimate calculator is an online tool for calculating the cost of roofing based on building height, dimensions, slope and roofing material. The calculator can be used to estimate the cost for flat, metal and asphalt installations. It can estimate the cost for new installations or making repairs.
Full Answer >The cost of constructing a three-story commercial building with a basement is dependent upon location, design of the building, square footage of the building and the materials used in construction. Construction costs are calculated on a square foot basis.
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