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.
TPO roofing is often sold in squares of 10 feet by 10 feet. The price of TPO is given in terms of how much a square will cost. Flat roofs are most common in urban areas, though some suburban and rural buildings have flat roofs.