There are some paints that can be used on the inside surface of your roof deck to block heat and lower the temperature of your attic on a hot day. These paints are usually silver or metallic in color. The best performing of these paints can block up to 75% of the heat coming through the roof deck. Radiant barrier foil sheets can block 90-97% of heat through the roof but the paint products may be easier to install, especially in retrofit situations. Be sure to find out the percentage of heat blockage for any product before you purchase. Currently, EPA does not label paints and coating for the inside of roof decks (or attic) in the insulation program because paints and coatings do not meet the Federal Trade Commissions (FTC) definition of home insulation. EPA qualifies paint only as a roof coating in our Roofs program (generally used for the top of a commercial building roof). Roof coatings are NOT insulation. They reflect solar heat off a roof rather than absorbing it keeping the building cooler. EPA also qualifies radiant barrier insulation ( a metallic foil material usually attached to a piece of wood and nailed to the inside roof deck) as ENERGY STAR because it meets the FTC definition of home insulation. For more information, see this technical study comparing the performance of several heat blocking paints in a simulated attic interior roof deck situation.
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ENERGY STAR products are independently certified to save energy without sacrificing features or functionality. Saving energy helps prevent climate change. Look for the ENERGY STAR label to save money on your energy bills and help protect our environment.
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Improving your home's energy efficiency with ENERGY STAR can help to lower high energy bills, improve comfort and reduce greenhouse gas emissions. Learn about the many ways to save in your home and track your progress with "My ENERGY STAR" - your new dashboard to savings.
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A new home that has earned the ENERGY STAR label has undergone a process of inspections, testing, and verification to meet strict requirements set by the US EPA. ENERGY STAR certified homes use 15-30% less energy than typical new homes while delivering better comfort, quality, and durability.
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