Radiant Barrier Roof
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Other kinds of radiant barriers combine reflective materials usually aluminium foil with materials like plastic films cardboard and kraft paper.
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.
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Radiant barrier roof. Watch this youtube video for an excellent explanation of the importance of an air gap. Radiant barrier installation attic radiant barrier installation most of the heat entering a home comes through the roof. A radiant barrier roof is a type of roof that is designed to reflect heat. Installing a radiant barrier underneath the roof will cause the roof temperature to increase by a few degrees usually 2 10o.
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. Nevertheless a radiant barrier may still help to improve comfort and to reduce the peak air conditioning load. Much of this heat travels by conduction through the roofing materials to the attic side of the roof. In these attic space applications there is an air space below the radiant barrier.
Normal attic insulation only helps to. Radiantguard radiant barrier foil insulation installed in an attics can reduce attic temperatures by up to 30 degrees when stapled with a staple gun to the underside of roof rafters by reflecting up to 97 of the radiant heat that strikes its surface thereby reducing heat. 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. The heat that would normally be absorbed by the insulation is now being bounced back to the roof deck and causing the roof to emit more heat upward rather than both upward and downward.
Normally the heat travels across the attic by radiation and is absorbed by the attic insulation. Installed in over 15 million homes in the united states lp techshield panels also lower attic temperatures up to 300 f. This video will also help you to understand the concepts of convection conduction and. When the sun heats a roof its primarily the suns radiant energy that makes the roof hot.
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. The radiant barrier should be installed in a manner to minimize dust accumulation on the reflective surface. 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.