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.
2. Divide the total roof area by 32 to get the number of sheets you will need to cover the roof. A typical 4 foot by 8 foot sheet of plywood covers 32 square feet.If your roof area is 1,600 square feet, 1,600 divided by 32 will mean you need about 50 sheets to cover the roof. Add 10 percent to allow for waste.. Divide the total roof area by 32 to get the number of sheets you will need to cover the roof. A typical 4 foot by 8 foot sheet of plywood covers 32 square feet.