1 A Virginia homeowner did all the prep work himself and paid roughly $2,500 for 1,560 square feet. 2  Total costs for a do-it-yourself brick patio can run $2.80 a square foot or $560 for a 10x20-foot area, according to AskTheBuilder.com.ontractor: Local. The contractor removed old concrete and trees in the 440 sqft patio, then installed the brick pavers (for 330 sqft), constructed garden walls (1 ft high), and a small brick step to the doorwall. The removal cost is about $900, and the remaining $2,650 is the cost for paver, garden walls and a step.
A few tips: To figure the size of your roof, see our square footage calculator. In roofing terminology, a square is 100 square feet. Composition shingles (asphalt or fiberglass) come in bundles that cover 1/3 square. Roofing comes in rolls 3 feet wide and 36 feet long, for a coverage of about 1 square. When installing roofing over bare wood, roofing felt -- often called tar paper -- is laid down first. A roll of 15-pound felt covers about 4 squares; a roll of thicker 30-pound felt covers 2 squares.
Estimating. To estimate how many shingles you'll need, first estimate the total square footage of your roof's surface. To do this, measure the length and width of each plane on the roof, including dormers.Then, multiply length x width to get the square footage of each plane. Finally, calculate your roof's total square footage by simply adding the square footage of each of the planes together.For example, this shed roof has one roof plane. Simply measure length (A) x width (B): A x B = 120' x 100' = 12,000 sq. ft. for the total square footage of the roof. This gable roof has two planes.inally, calculate your roof's total square footage by simply adding the square footage of each of the planes together. For example, this shed roof has one roof plane. Simply measure length (A) x width (B): A x B = 120' x 100' = 12,000 sq. ft. for the total square footage of the roof. This gable roof has two planes.