Debunk/confirm radiant reflectors in building construction
Debunk/confirm radiant reflectors in building construction
(OP)
I am putting together a pole barn with metal sheeting for myself. I am going with glass batts due to price. 6-8" walls and 12" roof. There has been some large discussion recently on radiant energy passing through the metal sheeting and the use a a radiant blocker would help.
I don't know if I can read much into that. The primary focus of radiant energy is on the outside, heating up the metal which in turn might create its own radiant source but I fail to see how a radiant blocker would do any more than good old glass insulation at mitigating the heat.
I am just trying to determine if I need to specify an additional "something" between the metal sheeting and glass insulation.
I don't know if I can read much into that. The primary focus of radiant energy is on the outside, heating up the metal which in turn might create its own radiant source but I fail to see how a radiant blocker would do any more than good old glass insulation at mitigating the heat.
I am just trying to determine if I need to specify an additional "something" between the metal sheeting and glass insulation.





RE: Debunk/confirm radiant reflectors in building construction
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RE: Debunk/confirm radiant reflectors in building construction
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(2B)+(2B)' ?
RE: Debunk/confirm radiant reflectors in building construction
If your primary concern is heating from the outside in, the radiant barrier would be effective between your cladding and your insulation. The bubble padding stuff creates its own air gap between the reflective surface and the hot emitting surface, which is necessary for it to function. The same material would be less effective if installed on the interior face of your insulation batts.
It would NOT be a useful replacement for your insulation unless you have no winter heating needs, nor would I reduce your insulation thickness based on the R value claims made by the manufacturers of this stuff.
It's also expensive. So it depends on how worried you are about the place getting hot in summer.
RE: Debunk/confirm radiant reflectors in building construction
basically trying to consider the corrugated metal heating up and the radiant heat it gives off, how to quantify that as well as quantify any improvement of a radiant blocker vs just glass batts.
RE: Debunk/confirm radiant reflectors in building construction
Obviously, you can have whatever opinion you have and do whatever you want, but it seems silly to try and nickel and dime your way to a reinvention of something that works with something which you think fits "Really anything that is shiny is a good radiant reflector"
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RE: Debunk/confirm radiant reflectors in building construction
If that air gap is cellular to limit free convection, that too is beneficial.