Radiant Barrier Roof Decking And Insulation

A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic.

Radiant barrier roof decking and insulation.

A cooler attic space means less heat moving to the cooler space below the attic. It is installed with the foil facing the attic and must have air space minimum of in front of the foil to work and of course code required ventilation. The results were very telling. Which type of radiant barrier is best.

A radiant barrier is typically stapled to the bottom truss chords against the deck sheathing. However radiant barriers can also be installed in other ways such as having it infused with your roof decking or underneath tiles. 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. 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 control study was published in 2013 showing the radiant barrier effectiveness of paint foil backed sheathing and foil that was stapled onto the rafters. A radiant barrier must have an emissivity of 0 1 or less to be effective. For a picture of this in action you can check out the product listing on amazon. In these attic space applications there is an air space below the radiant barrier.

Radiant barrier sheathing should only be used in cooling climate zones 1 2 3. Radiant barrier applied either under the roof rafters or under the roof sheathing is probably the most common application of a radiant barrier but many homeowners shy away from it because they don t fully understand what radiant barrier is or how it works. Reduces up to 97 of radiant heat. Radiant barrier paint performed the worse providing a heat decrease in the conditioned space of around 19.

Radiant barrier installation attic radiant barrier installation most of the heat entering a home comes through the roof. Installed in over 2 million homes in the united states lp techshield panels also lower attic temperatures up to 30 f. It reduces attic temperatures by up to 30 degrees fahrenheit and it blocks up to 97 of radiant heat. Suitable applications include sheathing in walls flooring and roof decking.

Radiant barrier sheathing can only be retrofitted to existing homes when the roof is being replaced. 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. A radiant barrier works best when it is perpendicular to the radiant energy striking it. The hot roof material then radiates its gained heat energy onto the cooler attic surfaces including the air ducts and the attic floor.

Benefits of radiant barrier sheathing.