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Due to a system upgrade, Smarthub and Pay Now will not be available on Saturday, December 9, from 8:00 a.m. to 3:00 p.m. EST. We apologize for this temporary inconvenience.
No insulation, regardless of its R-value, can totally stop conducted heat flow. All structures have voids, gaps or weak spots such as doors and windows. Properly installed insulation slows conducted heat flow to allow heating and air conditioning systems to maintain comfortable indoor conditions at reasonable costs. Because different areas of the structure are exposed to different conditions, they may require different levels of insulation to perform efficiently.
Insulation derives its ability to resist heat flow (R-value) from the millions of tiny pockets of trapped air or gas within the material. R-value can be diminished or lost if the insulating material is compressed or compacted. Care should be exercised to match the insulation material to the area to be insulated to avoid compacting and assure proper R-value. Generally speaking, insulation is of five basic types: rigid board, blankets and batts, loose fill, sprayed foam, and radiant barrier.
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For optimal viewing, Internet Explorer 8 or higher is required. If you are using an older version, download and install the latest version at http://windows.microsoft.com/en-NZ/internet-explorer/products/ie/home or adjust the zoom level on your browser.
Radiant barrier is a layer of aluminum foil placed in an air space to block radiant heat transfer between a heat-radiating surface (such as a hot roof) and a heat-absorbing surface (such as conventional attic insulation). Attic radiant barriers made of aluminum foil are becoming a popular way for homeowners living in warm-weather states to save energy and money and increase comfort. Radiant barrier blocks 95 percent of the heat radiated down by the roof. This creates a cooler attic transferring less heat into air conditioner ducts, resulting in a more efficient cooling system. Depending on your lifestyle, radiant barrier can save 8-12 percent of your annual cooling costs in the Southeast.
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