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The final method of installing a radiant barrier in an attic is to lay it over the top of the insulation on the attic floor. While this method can be more effective in the winter [ 12 ] there are a few potential concerns with this application, which the US Department of Energy [ 11 ] and the Reflective Insulation Manufacturers Association ...
He immediately grasped that they might be used as a replacement for foil radiant barriers, and proceeded to perform experiments verifying their viability for this use. In 1986 these coatings were applied for the first commercial application in homes built by Centex Corporation.
Radiant barriers will reflect radiant energy. A radiant barrier by itself will not affect heat conducted through the material by direct contact or heat transferred by moist air rising or convection. For this reason, trying to associate R-values with radiant barriers is difficult and inappropriate. The R-value test measures heat transfer through ...
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Radiant barriers are highly effective for attic spaces in hot climates. [54] In this application, they are much more effective in hot climates than cold climates. For downward heat flow, convection is weak and radiation dominates heat transfer across an air space. Radiant barriers must face an adequate air-gap to be effective.
Installed faced fiberglass batt insulation with its R-value visible (R-21) [1]. The R-value is a measure of how well a two-dimensional barrier, such as a layer of insulation, a window or a complete wall or ceiling, resists the conductive [2] flow of heat, in the context of construction. [3]