An attic ceiling covered with radiant barrier roof decking at the LSU Agcenter's LaHouse Resource Center in Baton Rouge. Nearly a year after moving into her rebuilt Lower 9th Ward home, Joanne ...

Without a radiant barrier foil, the heat radiates down to the attic insulation and through to your ceiling. Aluminum foil has the radiant barrier properties of high reflectivity and low emissivity.

Q: I have some things stored in my attic. It was extremely hot up there when I open the closet ceiling cover. The attic floor is insulated. How can I keep it cooler? A: People often are not aw ...

Question: Will stapling inexpensive aluminum foil under the roof rafters really reduce the heat inside my house? I feel a lot of heat coming through the ceiling in the afternoon and evening.

Q: I recently heard about some new cooling strategy called “radiant barriers” in which heat from the house is directed up to the roof. Do you know if this really works, and if reflectin… ...

Q: What is your take on using two-sided aluminum material in the attic over existing insulation? I've been told it is an idea from NASA that uses material like this to protect astronauts in space.

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Dear Jim: I opened the attic access panel in my closet to get a box and the heat was staggering. We have plenty of attic insulation, so is this increasing our cooling costs? If so, what can we do ...

‘Radiant barrier” is a relatively new term in the world of home improvement. So what exactly is it, how and why does it work, and what makes radiant barrier foil effective in reducing energy ...

Installed in attic air spaces between the roof decking and insulation, a radiant barrier is a layer of aluminum foil that keeps the attic air cooler by blocking heat from the roof.