$40 - $80 per square
1 This is usually rolled into the per square foot price of the project; 2  The Materials-the average sheet of roofing quality plywood that measures 5/8 thickness is roughly $20. 3  For this project it is going to require around 40 sheets for a cost of $800. Underlayment and accessories cost another $40-50 / square. Dump fees can range from $30-100 per ton (2000 lbs.) depending on where you live. 1 square of 1 layer of shingles weighs ~ 250 lbs., or 8 squares per ton. a 15 sq. roof is about 2 tons for one layer to be removed. A typical contractor has a base price per “square” (1 square is a roof area of 10*10′ or 100 sq. ft., and is used in the industry to simplify communication between suppliers, architects, sub-contractors and customers). One square of asphalt shingles usually costs between $50 and $150, as of June 2011. Metal roofing gives you more durability, but this shingle material costs more, ranging anywhere from $115 to $650 per square. Tiles offer a distinct look on the roof, but they also come with a high price tag. It depends on the type of roof. A single story low pitch asphalt shingle roof will cost around $40 - $80 per square (100 sq. ft.) to tear off and $75 - $100 per square to install new shingles. If the plywood sheathing underneath is damaged, it will cost extra, up to $50 per sheet replaced. Some contractors charge for flashing chimneys ($150 - $300) and pipes ($25). All labor performed on steep pitch roofs (7/12 and higher) will be about 10% or 15% higher. Two story housed may be 5% to 10% more. 1 The costs for the removal are going to be added into the per square foot cost given by the contractor, and the plywood necessary for the project will come at a total cost of roughly $800 (forty sheets at $20 each). 1 This means a total cost of $1500. 2  There is also the need for roofing felt at $18 per roll, for a total of $90. 3  Attaching all of the materials requires a roofing nail gun using a standard roll of 1 1/4 galvanized nails at $65 each, and roofing cement which is costs approximately $22 per gallon. 1 Lastly, there is the need for roofing cement, which is costs approximately $22 per gallon; and. 2  The Labor-according to HomeInspectorLocator.com a roofing contractor will charge around $3 per square foot for all aspects of the work, making this project run at a cost of $4500.
http://www.fixr.com/costs/roof-replacement http://www.roofcalc.org/roof-installation-prices/ http://www.roofcalc.org/roof-installation-prices/ http://www.ehow.com/info_8604965_much-square-roof-shingles-cost.html http://www.answers.com/Q/What_is_the_average_cost_per_square_foot_to_install_roof http://www.fixr.com/costs/install-roof-shingles http://www.fixr.com/costs/install-roof-shingles http://www.fixr.com/costs/roof-replacement
what is the price per square for roofing