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 More
Multiple 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.
According to builder Mike Guertin in a Fine Homebuilding article, a bundle of roofing shingles contains approximately 33 square feet of shingles. Shingles are sold by the bundle or the square. A square of shingles covers approximately 100 square feet.Full Answer >
The weight of a bundle of shingles depends on the weight of the shingles themselves, but for asphalt shingles is generally between 60 and 80 pounds. A bundle of shingles is packaged to be light enough to carry.Full Answer >
Assessing whether a wall is load-bearing is easier with access to the attic, but it can be done without if the building has a basement. Check the basement for support posts, girders and beams that stretch the length of the room. Walls that are above or perpendicular to these support structures are likely to be load-bearing.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.Full Answer >