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Need a new roof? Covering your existing asphalt shingles with metal roofing might be worth the expense. Here's a guide for metal roofing installation. In order to install a metal roof over an existing shingled roof, is it best to have the roof 'stripped' with strips of wood, or just place metal right on top of shingles? Cinematic Strings 2 Rapidshare Library.

Measure the area. Before you can begin to update your roof, you will have to get an accurate measurement and order your materials. Spinrite 5. Always try to measure from the ground first in order to keep yourself safe. If you must climb onto the roof to measure the space, be sure to use caution.

Mpp 2010 To 2007 Converter. • Find out the slope of your roof. The slope is given as rise-over-run, meaning the distance up over the distance over. This measurement will typically be a measurement over 12 inches (30.5 cm), something like 4/12 or 8/12.

Convert this to the equivalent in degrees and as a decimal. • Use the slope factor to determine the area of the roof. Measure the area (length x width) on the ground, and then multiply this by the slope (in decimal form). This means the slope factor form is: length x width x slope. This will give you the number of square feet that need to be covered. • For example, if your roof measures 10 feet (3.0 m) x 10 feet (3.0 m) and the slope of the roof is 12/12 (45 degrees, which converts to 1.414 in decimal form), you would multiply 10 x 10 x 1.414, to get the total of 141 square feet of roofing. • Find the square footage for the entirety of your roof, and add up the total to find out how much metal roofing you need to order.

• Allow for a minimum of 10% waste (extra roofing).

We get asked this question all the time: Can I install a new metal roof over shingles? The answer is: “ Yes you can.” And by doing so, you save in the labor and hassle of tearing off the old roof and you won’t be contributing to filling our landfills. Another added benefit is that the layers of your old roof will further insulate your home. Metal is the best choice due to its very low weight per square foot and its unique design. Metal roofing weighs less than one pound per square foot. Asphalt shingles can weigh up to four pounds per square foot depending on the brand. If you don’t want to take our word for it check with your local building department.