$30,000-$40,000
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. 1 The Materials-the average sheet of roofing quality plywood that measures 5/8 thickness is roughly $20. 2  For this project it is going to require around 40 sheets for a cost of $800. 1 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. 2  This will tend to take around 2 to 3 full business days to complete. 1 The Materials-the average sheet of roofing quality plywood that measures 5/8 thickness is roughly $20. 2  For this project it is going to require around 40 sheets for a cost of $800. 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 Having a roofing contractor remove (and dispose of) old roofing materials, then install asphalt shingles runs about $1-$4 a square foot, or a total of $1,700-$8,400 for a typical ranch-style home (1,700-2,100 square foot, gently sloping roof). 1 If removing and disposing of the existing roofing material isn't included in an estimate, this can add another $3-$5 a square foot or $510-$1,100 for a basic ranch-style home -- and costs go higher depending on location and the difficulty of the removal project. Metal roofing is the most expensive and can cost up to $30,000-$40,000 for large roof replacements. The quality of the roofing material will also determine the cost of roof replacement. For example, asphalt shingles can cost anywhere from $50 for average quality to $150 or more for the highest quality (per square). Pitch is a measurement of how high the roof is versus its length. The following are figures for the average cost of roof replacement: 1  Asphalt: $700-$3,700. 2  Slate: $17,000-$84,000. 3  Wood shingles or shake: $7,000-$20,000. 4  Concrete tile: $8,000-$21,000. 5  Ceramic clay tile: $12 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. 1 The Materials-the average sheet of roofing quality plywood that measures 5/8 thickness is roughly $20. 2  For this project it is going to require around 40 sheets for a cost of $800. 1 Squares of shingles, with a minimum forty year guarantee, average between $80 and $100 each and this project is going to demand approximately 13 to 15 for a total of roughly $1500. 2  There is also going to be the need for roofing nails, and a standard roll of 1 1/4 galvanized nails costs $65. 1 The Materials-the average sheet of roofing quality plywood that measures 5/8 thickness is roughly $20. 2  For this project it is going to require around 40 sheets for a cost of $800. For this reason, there is a fairly wide average range of prices. HomeAdvisor's Cost Guide says the average national price of a roof installation for most Americans ranges from $5,913 to $7,853. At the high end, people pay as much as $12,000; at the low end, they may pay as little as $3,000.  1 Do-it-yourself materials to install an asphalt shingle roof on an average one-story ranch-style home (with a gently sloping roof of 1,700-2,100 square feet) can run $680-$3,700, depending on the quality of the materials. 1 Roofing with synthetic slate tiles (recycled rubber or plastic molded to look like slate) is about $11,900-$18,900 for an average ranch house with a 1,700-2,100 square foot roof; or $21,000-$27,000 for a 3,000-square-foot roof.
http://www.fixr.com/costs/roof-replacement http://www.fixr.com/costs/roof-replacement http://www.answers.com/Q/What_is_the_average_cost_per_square_foot_to_install_roof http://home.costhelper.com/asphalt-shingle-roof.html http://www.networx.com/article/average-roof-replacement-cost http://www.fixr.com/costs/roof-replacement http://www.fixr.com/costs/roof-replacement http://www.improvenet.com/r/costs-and-prices/roof-installation-cost http://home.costhelper.com/roof.html
average cost of a roofing