1. Welcome Hearth.com Guests and Visitors - Please enjoy our forums!
    Hearth.com GOLD Sponsors who help bring the site content to you:
    Hearthstone Soapstone and Cast-Iron stoves( Wood, Gas or Pellet Stoves and Inserts)
    Caluwe - Passion for Fire and Water ( Pellet and Wood Hydronic and Space Heating)

Question of the day

Post in 'The Green Room' started by elkimmeg, Jul 26, 2006.

Thread Status:
Not open for further replies.
  1. elkimmeg

    elkimmeg Guest

    There is quite a battle going on in the insulation industry concerning bubble wrap for ducts vs fiberglass wrapping. I will supply more on both later.

    The question: Which facing of insulation is best Foil or Kraft facings and why? New research came up with evidence I never gave a thought to, so let the debate begin

    Helpful Sponsor Ads!





  2. MountainStoveGuy

    MountainStoveGuy New Member

    Joined:
    Jan 23, 2006
    Messages:
    3,629
    Loc:
    Northern Colorado Mountains
    Which has the greater R of K value?
  3. elkimmeg

    elkimmeg Guest

    Assuming both have the same r-value. good question.
  4. MountainStoveGuy

    MountainStoveGuy New Member

    Joined:
    Jan 23, 2006
    Messages:
    3,629
    Loc:
    Northern Colorado Mountains
    If they both have the same insulating properties, i would think the most eco freindly product to install would be bubble wrap. You wouldnt have to breath in all those fibers, and it would be fairly durable. But i dont think bubble wrap has the same r value of bat insulation. I would think that mabey that blue cottony stuff would mabey be a good compromise.
  5. velvetfoot

    velvetfoot Minister of Fire

    Joined:
    Dec 5, 2005
    Messages:
    6,650
    Loc:
    Sand Lake, NY
    My guess: Kraft. It has some permeability.
  6. elkimmeg

    elkimmeg Guest

    Let me re- phrase the question bubble wrap has nothing to do with the debate just yet.

    Which is better wall insulation, foil faced R13, or Kraft faced R13, assuming equal pricing
  7. MountainStoveGuy

    MountainStoveGuy New Member

    Joined:
    Jan 23, 2006
    Messages:
    3,629
    Loc:
    Northern Colorado Mountains
    Isnt KRAFT facing illagle to leave exposed because of its flamability?
  8. elkimmeg

    elkimmeg Guest

    Yes MSG but the tar adheisives of the foil backing are every bit flamable. it should be covered up. Vintage is getting closer to what the answer is.

    I thought the scientific types would charm in on this debate
  9. PutnamJct

    PutnamJct Member

    Joined:
    Feb 17, 2006
    Messages:
    221
    Loc:
    Putnam County NY
    My answer is actually: DK
    Thought the question would be how hot it was going to get here in the Northeast again?
    Sorry!
  10. saichele

    saichele Minister of Fire

    Joined:
    Nov 18, 2005
    Messages:
    525
    If the question is foil vs. kraft, I vote for carefully installed foil, because it would provide vapor (no convection) and radiant barrier as well.

    Steve
  11. elkimmeg

    elkimmeg Guest

    good answer that's what I thought. but not the answer Owens Corning provided
  12. elkimmeg

    elkimmeg Guest

    I will provide Owens corning / John Mansville/ answer after my round of golf. If I get a hole in one I will have to call a cab quite a pool built up for 7 years.. Other than that after 9:00 pm EST.
    What nobody has gone to Corning's web site of goggled the question.
    Hopefully this will touch the insulation debate A lot of streching the truth going on. Also there is a shortage of R38 19" width to fit between engineered 19.5" joist centers


    More on engineered joist in the Mac Mansions built cheap in the Ash Can. Gideon, something to think about
  13. Sandor

    Sandor Minister of Fire

    Joined:
    Dec 9, 2005
    Messages:
    917
    Loc:
    Deltaville,VA
    Isn't that a 19.2 spacing?
  14. elkimmeg

    elkimmeg Guest

    correct 19.2 spacing sucks

    As I allude to a huge battle is brewing in the insulation industry. One side is the bubble wrap the other side Owns Corning /John Mansville. The initial issue being duct wrap insulation. I was present where the discussion took place at the state of MA code revisions. The state of Ma wants to increase the r-value of duct wrap from R-5.0 to R-8.0. This increase would all but eliminate the bubble wrap industry Their product being more expensive than fiberglass insulation, would require double wrapping, making it cost prohibited The bubble wrap industry threatened a law suit claiming unfair businesses practices among other claims, THE FIBER GLASS INSULATION INDUSTRY financed testing and research proving the bubble wrap did not equal the r-values and flame spread ratings. Along the way, the testing and research came up with results, that foil faced insulation oxidized and retarded their reflective value. Within one year’s time. The answer to the question of the day was, Kraft faced insulation was better than foil faced

    In the link below are the results of bubble wrap testing financed by the fiberglass industry but done by the industry standard third party.

    The fiberglass industry is also being challenged by poly fill isotherm insulation
    The poly insulation is trying to discredit the fiberglass r-values due to voids in its installation procedure. Truth be told, the poly isotherm R-value was based on a full 4” wall cavity. not the common 3.5” 2/4 construction. The r-value per sq in favored fiber glass. Testing also proved the poly isotherm needed an additional strong vapor barrier. And that kraft faced fiberglass insulation installed correctly provided a better vapor barriers and more r-value for inch and it is cheaper. , Note nowhere did I mention celeous

    This link will also support these findings and cast a lot of un answered questions about bubble wrap

    http://www.naima.org/pages/resources/library/html/AH135.HTML
Thread Status:
Not open for further replies.

Share This Page