The aluminum is not used for its reflective properties but for its low emittingproperties.
Radiant roof barrier sheathing.
A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic.
Radiant barrier sheathing made up of either plywood or oriented strand board osb with athin layer of aluminum facing on one side is installed to the roof rafters with the aluminumlayer facing down.
It reduces attic temperatures by up to 30 degrees fahrenheit and it blocks up to 97 of radiant heat.
However radiant barriers can also be installed in other ways such as having it infused with your roof decking or underneath tiles.
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.
There are just a few manufacturers that make this unusual type of roof sheathing that has a shiny perforated aluminum foil craft paper laminated to one side of it.
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.
Installed in over 1 5 million homes in the united states lp techshield panels also lower attic temperatures up to 30 f.
Rbs radiant barrier sheathing weyerhaeuser radiant barrier sheathing rbs comes pre fabricated with a reflective foil layer that reflects up to 97 of the sun s radiant energy minimizing heat transfer through the roof and insulation to interior living spaces.
Other kinds of radiant barriers combine reflective materials usually aluminium foil with materials like plastic films cardboard and kraft paper.
A radiant barrier is typically stapled to the bottom truss chords against the deck sheathing.
For a picture of this in action you can check out the product listing on amazon.
Radiant barrier roof sheathing is a great product that will reduce your power bill.
A radiant barrier works best when it is perpendicular to the radiant energy striking it.