Radiant Barrier Roof
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The most effective radiant barrier sheathing is a structural roof sheathing panel which consists of an osb panel with heat reflecting foil laminated to one side.
When the sun heats a roof its primarily the suns radiant energy that makes the roof hot.
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Radiant barrier roof. The hot roof material then radiates its. A radiant barrier can be effective with an asphalt shingle roof only when installed inside the attic either to the underside of the roof decking or to the underside of the roof rafters. A radiant barrier roof is a type of roof that is designed to reflect heat. Normal attic insulation only helps to.
One common misconception regarding radiant barrier is that the heat reflecting off the radiant barrier back to the roof has the potential to increase the roof temperature and possibly damage the shingles. Radiant barrier installation attic radiant barrier installation most of the heat entering a home comes through the roof. Normally the heat travels across the attic by radiation and is absorbed by the attic insulation. Other kinds of radiant barriers combine reflective materials usually aluminium foil with materials like plastic films cardboard and kraft paper.
This video will also help you to understand the concepts of convection conduction and. If youve ever wondered why some attics are lined with shiny metallic looking material this article will explain the ins and outs of the subject. In these attic space applications there is an air space below the radiant barrier. A larger air space between the radiant barrier and the attic roof essentially increases the effectiveness of the radiant barriers efforts at reducing heat transfer.
Installing a radiant barrier underneath the roof will cause the roof temperature to increase by a few degrees usually 2 10o. Watch this youtube video for an excellent explanation of the importance of an air gap. Much of this heat travels by conduction through the roofing materials to the attic side of the roof. Installed in over 15 million homes in the united states lp techshield panels also lower attic temperatures up to 300 f.
As the original 1 brand of radiant barrier sheathing lp techshield panels vaporvents technology prevents moisture buildup during and after construction while blocking up to 97 of radiant heat in roof panels. Nevertheless a radiant barrier may still help to improve comfort and to reduce the peak air conditioning load. Radiant barrier works by reflecting heat coming off the roof.