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 by reducing heat transfer from the attic to living spaces resulting in lower utility bills. This method also reduces the heat subject to attic mounted AC duct work thereby allowing them to work more efficiently. A secondary method of installation, instead of installing under the attic rafters, is to lay the foil insulation over the attic floor.  Although this method of laying over the attic floor won't lower the temperature of your attic space, it will still reflect up to 97% of the radiant heat that strikes its surface thereby reducing heat transfer from the attic to living spaces resulting in lower utility bills.

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 by reducing heat transfer from the attic to living spaces resulting in lower utility bills. This method also reduces the heat subject to attic mounted AC duct work thereby allowing them to work more efficiently. A secondary method of installation, instead of installing under the attic rafters, is to lay the foil insulation over the attic floor.  Although this method of laying over the attic floor won't lower the temperature of your attic space, it will still reflect up to 97% of the radiant heat that strikes its surface thereby reducing heat transfer from the attic to living spaces resulting in lower utility bills.

 

Carbon Footprint

50%

Energy Efficiency

75%

Sound Control

25%

To make up for the exposed AC duct work with this installation method, you can easily lay a blanket of radiant barrier over the duct work to protect them from the heat. Heat travels from a warm area to a cool area by a combination of conduction, convection, and radiation. Heat flows by conduction from a hotter location within a material or assembly to a colder location, like the way a spoon placed in a hot cup of coffee conducts heat through its handle to your hand. Heat transfer by convection occurs when a liquid or gas -- air, for example -- is heated, becomes less dense, and rises. As the liquid or gas cools, it becomes denser and falls.

Radiant heat travels in a straight line away from any surface and heats anything solid that absorbs its energy. Radiant barriers and reflective insulation systems work by reducing radiant heat gain. To be effective, the reflective surface must face an air space. Dust accumulation on the reflective surface will reduce its reflective capability. The radiant barrier should be installed in a manner to minimize dust accumulation on the reflective surface. When the sun heats a roof, it's primarily the sun's radiant energy that makes the roof hot. Much of this heat travels by conduction through the roofing materials to the attic side of the roof. The hot roof material then radiates its gained heat energy onto the cooler attic surfaces, including the air ducts and the attic floor. A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic.

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