Over time these savings will repay the cost of having the radiant barrier. Radiant Barrier reduces the amount of heat entering into the building causing the A/C condenser to work on shorter cycles and therefore saving money on electricity. Can radiant barrier insulation save me money?Īnswer: Yes, if the floor below the roof is being air conditioned.Their results indicate that it has provided significant resistance to heat transfer. Has radiant barrier heat insulation been tested by a qualified independent laboratory?Īnswer: The Florida Solar Energy Center at Cape Canaveral has tested radiant barrier in both small scale laboratories and in full scale building models.It may help to understand if you think of other materials that perform the same way ASTRONAUTS SPACE SUIT - keep body heat in and reflect the sun’s heat away. The 1,000 square foot rolls are about 6 inches in. To stop radiant heat you must reflect it with a radiant barrier.Īnswer: Over your roof purlins like a blanket or stapled under your wooden rafters and in your attic spaces.Īnswer: Radiant barrier reflects the sun’s heat before it can warm up the space in your attic. BlueTex double-sided foil radiant barrier is tear-proof and will not tear when you are stapling it up. Unlike many insulations which slow down heat transfer it reflects heat. This means that only 2% of the heat is emitted to the inside of the building.Ĭommon Questions about Radiant Barrier Foil Heat InsulationĪnswer: It is a radiant reflector. Second and most important, aluminum has a low emissivity of between 0.03 and 0.05. First, the aluminum is reflective on the hot side, reflecting most of the heat from where it came. There are two properties on which radiant barrier works: Reflectivity and Emissivity. A third seldom discussed but dominant form of heat transfer that exists is: RADIANT HEAT TRANSFER.Ī radiant barrier insulation reflects radiant heat energy instead of trying to absorb it. These products use their ability to absorb or resist (slow down) convective and conducive heat transfer to insulate (R-value). Basically, most foil barriers have the emissivity (which is measured on a scale from 0 to 1) of about 0,1 or below, meaning that they will be able to block. Most people are familiar with traditional insulating materials such as fibreglass, Styrofoam and rock wool. A radiant barrier or foil radiant barrier has a reflective surface that bounces away the suns rays and reduces the radiant heat that enters your home. This is not kitchen foil (kitchen foil is only about 20% aluminum this is 99.5% pure aluminum). It consists of a pure aluminized film which is unaffected by humidity and will continue to perform at a consistent level no matter how humid it may be. Radiant barrier insulation reflects radiant heat energy instead of trying to absorb it. Radiant barrier insulation is a reflective insulation system that offers a permanent way to reduce heat.
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