Radiant heat barrier products Published: Sep. 04, 2007, 12:31 a.m. By Zolton Cohen | The Grand Rapids Press ...

For example, I’ve seen studies that show radiant barriers can reduce heat gain through R-19 insulated ceilings by more than 40 percent, which is true. But that doesn’t mean your bill goes down ...

PUBLISHED: June 28, 2008 at 3:00 AM PDT Q. I recently heard about some new cooling strategy called “radiant barriers” in which heat from the house is directed up to the roof.

By JAMES DULLEY / Column Aug 8, 2015 Updated Aug 15, 2016 0 ...

Let's say that the attic in this home accounts for maybe 12 to 15 percent of this cooling cost in terms of heat coming through the ceiling and into the living space. In other words, using a figure ...

Non-Uniform Effectiveness: The effectiveness of radiant heat barriers varies depending on factors such as roof pitch, orientation, shading, and the presence of obstacles.

Adding more insulation will not help much. The easiest and most effective do-it-yourself method is to install radiant barrier foil under your roof rafters and add more attic ventilation.

A radiant barrier is a material that blocks radiant heat energy. This is the kind of heat that is created when the sun shines on your roof. Your roof can reach 150 degrees or more.

The form of heat that comes from a hot roof and attic is called radiant heat. This is a different form of heat transfer than normal conductive heat which thermal insulation is used to block.

The barrier blocks the direct heat flow from the roof to the room ceiling and the ventilation carries away the hot attic air. The ventilation also helps during winter to avoid moisture ...

The effectiveness of radiant heat barriers lies in their ability to reflect radiant heat. When exposed to the sun, windows, walls and roofs absorb a significant amount of solar radiation.