Benefits of Metal Roofing


Metal beats out conventional roofing materials in several ways:

Expected life. 

Properly installed, a metal roof should last as long as the house, sealing out water, surviving high winds, and easily shedding snow. Metal is resistant to fire, mildew, insects, and rot.

Weight. 

Compared to the weight of tile at 750 pounds per square (an area equal to 100 square feet) or concrete tile at 900 pounds per square, metal roofing is very lightweight. Most varieties run from 50 to 150 pounds per square.

Speed & ease of roofing installation. 

Most metal roofing materials come in multiple-shingle sections or in 12- to 36-inch-wide panels.
Fire resistance. 
Because metal roof materials are noncombustible, they typically have a Class A fire rating (the most fire-resistant rating).
Heat conduction. 
Metal reflects radiant heat from the sun, minimizing midday heat gain. This means you save energy needed for air conditioning during the day. Though the material itself is low in insulation R-value, metal roofing can be applied over rigid-foam insulation that has very high R-values.
Metal Roofing Drawbacks
Though metal roofing offers many pluses, a few drawbacks are worthy of mention. For the most part, metal roofing manufacturers have improved their products to address or solve many of these concerns:
Cost. 
The biggest drawback is initial cost. Metal roofing is equivalent in cost to other premium materials—from about $150 to $600 per square (100 square feet).
Noise. 
For some, the sound of rain tapping on the roof is romantic and homey. For others, it’s like living inside a drum. In a rainstorm or hailstorm, living beneath thin sheets of metal is bound to be noisier than living beneath thick slate or tile.
Denting. 
Just as your car will dent if a golf ball hits it, a metal roof can dent if large hailstones fall on it.


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