The simple answer is yes, it works. BUT it may not work as well as the
As long as the surface is clean, it does do a good job of reflecting
radiant heat. However it does not help much otherwise. Once dusty, which
happens rather quickly in many uses, it looses a lot of it's ability. It
has it's place, but don't count on getting the results the adds suggest.
For the most part, I suggest the old tried and true materials.
....research has proven that radiant barriers installed in heating
dominated climates are not economic at all unless the material and labor
costs are extremely low (almost free.) And, in some cases, radiant
barriers have been seen to actually increase heating costs since the
attic was kept cooler during sunny winter weather. This increased heat
loss from the living space below during those sunny daytime hours.
Used it last year after one season of very hot weather in the Atlanta area.
Prior to installing I monitored the attic temp compared to outside temp.
Generally, attic was 20 - 25 degrees hotter, even with powered attic fan
running almost continously. I installed the foil sheets (Lowes) on the
underside of the roof rafters. Temp. difference is now consistently 10
degrees. The A/C unit in the attic likes that improvement....and....
if we go into the attic, late at night, after a few tequila shots, the wife
gets really WILD, if you know what I mean, what with the mirrored ball and
strobes and all.
I think it's worth it but that's just me.
I have not measured the temp of the roof deck. When I researched this
product, I found nothing that would discourage me from using it (obviously).
I looked at data from mfg'rs and research groups with no profit interest. I
believe there was a DOE study, as well.
The panels are fastened to the under side of the roof rafters and approach
the soffit vents at the lower end and the ridge vent at the upper end. No
other material is in placed between the rafters so this forms a channel for
air to circulate from the soffits to the ridge.
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