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Isn't a metal roof noisy? It is one of the most frequently asked questions about metal roofing. The theory that a metal roof is "noisy" stems from the memory of a barn, or a patio awning, where there is nothing between an individual and the roof, except air.
Thermal expansion and contraction is a great concern with metal roofing system. Question is if this thermal movement can pull out screws, elongate holes in metal Roofing System panels, and cause our panels to shift or bend.
Well, thermal expansion is the tendency of matter to change in volume in response to a change in temperature. When a substance is heated, its particles begin moving more and thus usually maintain a greater average separation. Materials which contract with increasing temperature are rare; this effect is limited in size, and only occurs within limited temperature ranges.
Assuming, the distance between fasteners on the metal Roofing System panels is ~15", the steel will expand ~.569 micro-inches (.000000569 inch) every 15" (from 32 degrees to 212 degrees Fahrenheit)
Assuming the width of the metal Roofing System panels is ~43", the width of the steel will expand ~ 1.634 micro-inches (.000001634 inch) in 43" (from 32 degrees to 212 degrees Fahrenheit)
Assuming the maximum length of the metal Roofing System panel is 20 feet, the length of the panel will expand ~ 9.120 micro-inches (.00000912 inch) in 480" (from 32 degrees to 2012 degrees Fahrenheit)
Moreover, because of its profile, our panels use the "accordion effect" which occurs when fluctuations in the motion of a particles causes disruptions in the flow of elements following it. This effect generally decreases the expansion and contraction of the system in which it occurs.
Accordion effect can leave the fasteners securely in place while still allowing the metal to move a bit.
The threats of a strike are affected by the construction materials used for both framing and roof coverings. If these materials are (electrically) conductive, the threat of fire and explosion are both reduced. They will not con-tribute a fuel source to any fire resulting from a lightning strike.
Because metal roofing is both an electrical conductor and a noncombustible material, the risks associated with its use and behavior during a lightning event makes it the most desirable construction material available.
The probability of a lightning strike is determined by a number of factors:
Presented by a homeowner from a moderate climate in Indiana after his new energy-efficient cool metal roof was installed in early 2011. While savings will always vary somewhat based upon the individual home and homeowner, potential savings can be expected to be even greater in warmer climates.
Average temperature was the same in 2010 and 2011.
Energy use was 328 kw less in 2011 for a savings to the homeowner of $47.00
Average temperature was 1 degree cooler in 2011 than 2010.
Energy use was 404 kw less in 2011 for a savings to the homeowner of $58.00
Average temperature was 1 degree cooler in 2011 than 2010.
Energy use was 305 kw less in 2011 for a savings to the homeowner of $44.00
Average temperature was 2 degree cooler in 2011 than 2010.
Energy use was 356 kw less in 2011 for a savings to the homeowner of $51.00
Average temperature was 3 degree cooler in 2011 than 2010.
Energy use was 642 kw less in 2011 for a savings to the homeowner of $80.00
Average temperature was 2 degree cooler in 2011 than 2010.
Energy use was 363 kw less in 2011 for a savings to the homeowner of $52.00
| Roof Insiders Metal Roofing System | Standing Seam | 3-Tab Shingles | Concrete Tiles | Architectural Shingles | Clay Tiles | Premium Shingles | Cedar Shakes | |
|---|---|---|---|---|---|---|---|---|
| $29,520 | $15,419 | $18,537 | $19,854 | $24,831 | $25,768 | $27,460 | $30,838 | Low End |
| $19,273 | $23,169 | $24,817 | $30,099 | $32,209 | $34,323 | $38,546 | Mid-Range | |
| $23,128 | $27,804 | $29,781 | $36,120 | $38,651 | $41,188 | $46,256 | High End |
