Comments on: The Effect of Radiant Barriers on Shingle Temperatures. Am I going to BAKE my shingles? http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/ Saving You Money on Your Energy Bills Tue, 24 Jan 2012 14:14:26 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Tyler http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/#comment-3606 Tyler Wed, 17 Aug 2011 16:31:39 +0000 http://www.radiantbarrierguru.com/?p=155#comment-3606 Yeah I was looking for more ways to save money on electricity and recently I went up into my attic. It was 160F here in Texas. I am now researching these radiant barriers and was wondering about the shingles & roof damage. After reading this I feel more confident. Thanks. Yeah I was looking for more ways to save money on electricity and recently I went up into my attic. It was 160F here in Texas. I am now researching these radiant barriers and was wondering about the shingles & roof damage. After reading this I feel more confident. Thanks.

]]> By: Ed http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/#comment-2102 Ed Wed, 18 May 2011 20:00:07 +0000 http://www.radiantbarrierguru.com/?p=155#comment-2102 David, This should not be a big deal. While I haven't done testing to see the results, I do plan to test this out to see what conclusions can be made. David,
This should not be a big deal. While I haven’t done testing to see the results, I do plan to test this out to see what conclusions can be made.

]]> By: David http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/#comment-2088 David Sat, 14 May 2011 18:55:03 +0000 http://www.radiantbarrierguru.com/?p=155#comment-2088 What about baking the roof decking? I'm concerned reflecting the radiant heat back through the roof will cause dry rot to the roof decking. Have you conducted any tests on the decking? What about baking the roof decking? I’m concerned reflecting the radiant heat back through the roof will cause dry rot to the roof decking. Have you conducted any tests on the decking?

]]> By: Ed Fritz http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/#comment-978 Ed Fritz Mon, 15 Nov 2010 22:54:23 +0000 http://www.radiantbarrierguru.com/?p=155#comment-978 I would discourage using radiant barrier as your primary waterproofing layer. Felt products are relatively cheap and provide excellent "waterproofing" ability yet still allow moisture to pass through or the ability for the wood deck to "dry out". Secondly, you CANNOT apply shingles directly on top of a radiant barrier product and still have a radiant barrier. Radiant heat by definition is heat transfer ACROSS an airspace. Without an airspace, you cannot have radiant heat much less a radiant barrier. Here is blog post and video on <a href="http://www.radiantbarrierguru.com/new-videowhy-is-an-air-gap-required-for-radiant-barrier-to-work/" rel="nofollow">Why Is An Airspace Required For a Radiant Barrier To Work</a> If you can incorporate an airspace into the roofing assembly, you can put AtticFoil Brand Radiant Barrier Foil directly over the felt under the roof. Here is information on <a href="http://www.atticfoil.com/radiant-barrier-shingles.htm" rel="nofollow">How To Install Radiant Barrier In Roofing Systems.</a> I would discourage using radiant barrier as your primary waterproofing layer. Felt products are relatively cheap and provide excellent “waterproofing” ability yet still allow moisture to pass through or the ability for the wood deck to “dry out”. Secondly, you CANNOT apply shingles directly on top of a radiant barrier product and still have a radiant barrier. Radiant heat by definition is heat transfer ACROSS an airspace. Without an airspace, you cannot have radiant heat much less a radiant barrier. Here is blog post and video on Why Is An Airspace Required For a Radiant Barrier To Work
If you can incorporate an airspace into the roofing assembly, you can put AtticFoil Brand Radiant Barrier Foil directly over the felt under the roof. Here is information on How To Install Radiant Barrier In Roofing Systems.

]]> By: Eldon McCurley http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/#comment-974 Eldon McCurley Sun, 14 Nov 2010 03:49:30 +0000 http://www.radiantbarrierguru.com/?p=155#comment-974 Due to a recent hail storm I'm going to have a new roof put on my house. I'm considering using sheet radiant barrier instead of 30 lb. felt, placed on the decking, then 30 yr. asphalt shingles. What's your recommendations on a good sheet radiant barrier product to use, and the benefits of using it rather than roofing felt. Thanks, Eldon Due to a recent hail storm I’m going to have a new roof put on my house. I’m considering using sheet radiant barrier instead of 30 lb. felt, placed on the decking, then 30 yr. asphalt shingles. What’s your recommendations on a good sheet radiant barrier product to use, and the benefits of using it rather than roofing felt.
Thanks,
Eldon

]]> By: Steven http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/#comment-913 Steven Mon, 08 Nov 2010 21:58:45 +0000 http://www.radiantbarrierguru.com/?p=155#comment-913 I saw your reply to a YouTube video. I had also wondered how a radiant barrier would effect the roof. Your explanation makes perfect sense. Thanks for the excellent information. I saw your reply to a YouTube video. I had also wondered how a radiant barrier would effect the roof. Your explanation makes perfect sense. Thanks for the excellent information.

]]> By: Ed Fritz http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/#comment-440 Ed Fritz Wed, 28 Apr 2010 15:45:10 +0000 http://www.radiantbarrierguru.com/?p=155#comment-440 Klaus, It's tough to say exactly. Heat that would be absorbed by the insulation is being reflected back towards the roof. However, very little radiant heat is absorbed by air. Radiant heat goes right through transparent objects like glass, air etc. So, from testing different roofs over a radiant barrier they tend to increase only a few degrees in temperature. In theory, this COULD cause the actual air inside the attic to go up a few degrees depending on the ventilation. I'm always in favor of good ventilation ESPECIALLY if there is ductwork in the attic. Here is an article on <a href="http://www.radiantbarrierguru.com/attic-ventilation-basic-tips/" rel="nofollow">proper attic ventilation:</a> Klaus,

It’s tough to say exactly. Heat that would be absorbed by the insulation is being reflected back towards the roof. However, very little radiant heat is absorbed by air. Radiant heat goes right through transparent objects like glass, air etc. So, from testing different roofs over a radiant barrier they tend to increase only a few degrees in temperature.

In theory, this COULD cause the actual air inside the attic to go up a few degrees depending on the ventilation.

I’m always in favor of good ventilation ESPECIALLY if there is ductwork in the attic. Here is an article on proper attic ventilation:

]]> By: Klaus Beyer http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/#comment-437 Klaus Beyer Tue, 27 Apr 2010 23:24:57 +0000 http://www.radiantbarrierguru.com/?p=155#comment-437 If the attic foil is installed on top of the attic insulation, is the space between the attic foil and the roof hotter because of the reflected heat in comparison to the same space without the presence of an attic foil layer. Our current house has the standard ridge venting . Would the implementation of attic foil necessitate additional venting ? If the attic foil is installed on top of the attic insulation,
is the space between the attic foil and the roof hotter because
of the reflected heat in comparison to the same space without
the presence of an attic foil layer.
Our current house has the standard ridge venting .
Would the implementation of attic foil necessitate additional
venting ?

]]> By: Don Leiter http://www.radiantbarrierguru.com/the-effect-of-radiant-barriers-on-shingle-temperatures-am-i-going-to-bake-my-shingles/#comment-307 Don Leiter Mon, 15 Feb 2010 18:18:36 +0000 http://www.radiantbarrierguru.com/?p=155#comment-307 Thanks for reference to your article. Very helpful! Don Thanks for reference to your article. Very helpful! Don

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