Radiant Barrier On Top Of Roof Decking

Reduces up to 97 of radiant heat.

Radiant barrier on top of roof decking. 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. For a picture of this in action you can check out the product listing on amazon. Radiant barrier sheathing emits 3 5 of the heat it absorbs and can reducesummer heat gain in the roof from 16 to 42. Some of thefacts they list are.

A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic. The hot roof material then radiates its gained heat energy onto the cooler attic surfaces including the air ducts and the attic floor. Other kinds of radiant barriers combine reflective materials usually aluminium foil with materials like plastic films cardboard and kraft paper. Radiant barrier installation attic radiant barrier installation most of the heat entering a home comes through the roof.

Delta t is the difference between the temperature of the top layer of insulation in the attic or wall system and the living spaces. A radiant barrier is typically stapled to the bottom truss chords against the deck sheathing. 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. During the hot summer the heat of the sun can raise the temperature of the top shingles of the roof to nearly 180 degrees.

A radiant barrier works best when it is perpendicular to the radiant energy striking it. For a shingled roof there isn t really a way to add a radiant barrier unless you were re decking or building a new roof on top of the old one the new roof being metal or tile with the required air space minimum the foil needs. However radiant barriers can also be installed in other ways such as having it infused with your roof decking or underneath tiles. In these attic space applications there is an air space below the radiant barrier.

Specifications in selecting your radiant barrier sheathing make sure that the label indicated that the productemittance is less than 0 1 as measured by astm 1371. 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. 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. It reduces attic temperatures by up to 30 degrees fahrenheit and it blocks up to 97 of radiant heat.

The bottom of the roof deck will be 20 or 30 degrees lower.