Radiant heat barrier installed

[J Persons]

Took a 3 man crew about 4 hours to install. During the install, I took some temp samples of the roof deck and the aluminum foil covering using an IR thermometer. The bare roof deck was between 98° and 104°. The aluminum heat barrier was never above 85°. The shop at chest height was around 81°. This stuff won't do a thing for retaining heat in the winter, but hopefully will tame the brutal summers we have here. It's also reflective and will brighten up the shop. I got this material at atticfoil.com. 2000ft was $250.00

 

[Flexia]

But what's it doing to your roof surface?

 

[J Persons]

But what's it doing to your roof surface?

In a word, nothing. According to govt tests, there is only a 2° to 10° increase in temps. The reason for the small increase in temps is the 4" air gap between the foil and bottom of the roof deck. The foil is open at the soffit and also open at the peak of the roof. According to a smoke test I saw, air will enter at the bottom and exit at the top, keeping the roof deck and shingles at a reasonable temp.
http://www.atticfoil.com/install-questions/myths.html

This is not the same stuff as the foil covered OSB that will overheat the shingles.

 

[AP514]

Radiant Barrier is worth its weight in GOLD...It saves you tons of Money plain and simple.
I have 2 houses in Houston area.....the older one has no Barrier..I can only stand it in the attic for about 10 minutes in the summuer before I have to get the Hell out of there.
Now the house with the Barrier installed I can do 20-30 minutes before I have to run for cover (cool off)
***Barriers are not created equally***
I had the Barrier on my Roof decking before it was installed (Georgia Pacific). I used them because the Barrier is Glued straight to the wood. (Wood, Glue, Barrier). Unlike others that use a pre glued paper backing on the Barrier.(Wood, Glue, Paper, Glue, Barrier).
I had spacificly ordered the GP Barrier decking...
The Lumber company delivered the second type of barrier to my house. I was gone for 3 days and most of the Decking was installed on the roof. Then we had a light rain and the Barrier started to peel right off(due to the Paper backing) it cost the lumber company 290 sheets of decking plus the crew to rip off the old stuf and install new.

It was funny because the crew that showed up to remove and install the decking all had Nail Guns in hand....I have a STEEL FRAME house Needless to say they started the next day....My poor temp power box looked like a GRIZZWALD Christmass tree(it has splitters on splitters on power splitters) only poped the C/B 2 times..LoL

 

[brass89]

+1 griswold tree.. lmao