Comments on: Radiant Barrier Under Shingles – Scams, & Bad Information http://www.radiantbarrierguru.com/radiant-barrier-under-shingles/ Saving You Money on Your Energy Bills Thu, 29 Jul 2010 20:31:22 -0700 http://wordpress.org/?v=2.8.4 hourly 1 By: Jeff W http://www.radiantbarrierguru.com/radiant-barrier-under-shingles/#comment-446 Jeff W Fri, 30 Apr 2010 16:09:45 +0000 http://www.radiantbarrierguru.com/?p=71#comment-446 So I'm confused. Radiant Barriers do work but only on the inside of the attic then? So I’m confused. Radiant Barriers do work but only on the inside of the attic then?

]]> By: Ed Fritz http://www.radiantbarrierguru.com/radiant-barrier-under-shingles/#comment-411 Ed Fritz Wed, 07 Apr 2010 19:11:52 +0000 http://www.radiantbarrierguru.com/?p=71#comment-411 Danny, you can't "reflect" conductive heat. You can only slow it down since it travels through a solid. This is the concept of R-Value. Since radiant heat is in a waveform, it can be reflected. The problem with putting any R-value on a roof is that the roof is normally not really part of the "thermal envelope". The thermal envelope is usually your walls and ceiling. The roof just keeps it dry. So, you want R-value on your attic floor and radiant barrier at the roof. This is like putting a refrigerator in the shade. Danny, you can’t “reflect” conductive heat. You can only slow it down since it travels through a solid. This is the concept of R-Value. Since radiant heat is in a waveform, it can be reflected. The problem with putting any R-value on a roof is that the roof is normally not really part of the “thermal envelope”. The thermal envelope is usually your walls and ceiling. The roof just keeps it dry. So, you want R-value on your attic floor and radiant barrier at the roof. This is like putting a refrigerator in the shade.

]]> By: Danny Williams http://www.radiantbarrierguru.com/radiant-barrier-under-shingles/#comment-384 Danny Williams Wed, 31 Mar 2010 15:19:55 +0000 http://www.radiantbarrierguru.com/?p=71#comment-384 Thanks for your explaination on radiant barriers. Since you have identified that when things are sandwiched together they produce conductive heat, will a Thermal barrier be benificial to reflect away 97% of the conductive heat? In other words is there a beneift in putting a thermal barrier on the roof as Polaraum suggest. By the way their product is applied between the felt paper and the shingles with the foil side down on the felt and the white felt side up facing the shingles. I really need to know if having a thermal barrier that reflects heat away will help keep my attic cooler? If so, in your opinion how much? OR is it really a wast of money? A reply ASAP will help me since I am in the process of changing out my roof. Thanks Danny Williams Thanks for your explaination on radiant barriers. Since you have identified that when things are sandwiched together they produce conductive heat, will a Thermal barrier be benificial to reflect away 97% of the conductive heat? In other words is there a beneift in putting a thermal barrier on the roof as Polaraum suggest. By the way their product is applied between the felt paper and the shingles with the foil side down on the felt and the white felt side up facing the shingles. I really need to know if having a thermal barrier that reflects heat away will help keep my attic cooler? If so, in your opinion how much? OR is it really a wast of money? A reply ASAP will help me since I am in the process of changing out my roof.

Thanks
Danny Williams

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