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  1. #1
    Join Date
    Apr 2008
    Posts
    166

    Pef Raidiant Barrier option for fan compartment?

    I’m looking for advice on re-insulating a pair of rather old 75 ton Trane roof top units that have lost most of their inside fiberglass - primarily in the fan compartments.
    I was wondering if there are any down-sides to using one of these radiant barrier products?
    Our main goal is to cut down on the solar gain from the metal roof and side panels, this stuff would be much cheaper than fiber.
    Price is a factor too in that these will likely be replaced w/i three or four years, mean time we're picking up about +10 with the largely bare metal.
    http://www.ecofoil.com/All-Products/...ation-Products
    I am told I would be cleaning and gluing the sheets on with 3m #77.
    Thanks ahead!

  2. #2
    Join Date
    Oct 2004
    Posts
    28

    Thermal Barrier


  3. #3
    Join Date
    Apr 2008
    Posts
    166
    http://thermacote.com/
    Ok. But I can't find anything on that site that shows any relative effectiveness by some measure (or to other methods)?
    It beat "paint". I wonder if they beat spray on foam roofing.
    The claim is 90 + % radiant reflection (if that's the right term) for the films, 'bubble type adds a bit of R value (4) without an air gap which is what I'd be doing.
    I would guess that putting a barrier on the outside (vs. allowing the case to absorb the radiant energy in the first place) would be better. I considered 'film on the outside but they don't rate it for that use, not sure it'd fly aesthetically anyway.

  4. #4
    Join Date
    Oct 2004
    Posts
    28

    Give them a call

    Give them a cal and talk to TJ let him know that Danny-(Bouncer) suggested you give em a call.With thermal barriers,R values are bogus...TJ is the inventor and he definetly can explain far better that I

  5. #5
    Join Date
    Feb 2006
    Location
    Float'N Vally, MS
    Posts
    1,841
    The last time we did this we used sheet rubertex and glued pinned it in some places.
    Life is too short, Behappy!
    TFMM

  6. #6
    Join Date
    Apr 2008
    Posts
    166
    Quote Originally Posted by behappy View Post
    The last time we did this we used sheet rubertex and glued pinned it in some places.
    Thanks, I'll check but I'd suspect that'd be as or more expensive than fiber(?)

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