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by • March 24, 2011 • Insulation & Air Sealing, UncategorizedComments (3)3972

Air Sealing With Owens Corning Energy Complete

  Build Tight, Ventilate Right.  That’s a motto I took from my favorite building science teacher Mark LaLiberte.  This motto is important for energy efficiency & indoor air quality goals.  In my houses I’m striving to build the tightest air envelope possible.  Then, I’ll bring in the fresh air when it’s needed and through our HVAC system so it can be filtered and distributed on a regular basis.  I’ve heard people say that modern houses are too tight.  I say this argument is boloney.  Why would we want our homes to be intentionally leaky?  Do we want pollen-filled humid air to just leak in under walls/doors/windows/outlets any time the wind blows?  No, we want a super-tight house that resists the forces of nature so we can let our HVAC system and our insulation systems work properly.
  In most of my homes over the last few years I’ve been using 100% spray foam for insulation which does a fantastic job of air sealing the stud cavities & attics.  However, one area that can use improvement is the wood to wood connections & wood to concrete connections.  In the past I’ve had my framing carpenters use Sill Sealer under bottom framing plates for air sealing along with a bead of construction adhesive but it’s not 100% foolproof.  In this video you’ll see where Owens Corning’s new Energy Complete system has a leg up on just using spray foam.  -Matt Risinger

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  • we’ve been following your blogs for quite awhile now and there is never disappointment from what I read! Keep up the quality work.

    http://www.energyefficienthometips.com

  • Hi Matt,
    Thank you for your blog, very informative.
    I was wondering how did you do in your Blower test?
    Was the energy complete method better than O.C. Foam or Cellulose?
    Isn’t there potential sagging from the Fiberglass?
    Any other, thoughts, wishes or comments in hindsight?
    Thank you

  • @Acidex: Thanks for your kind words. This house blew a 2.5 ACH50 which is very tight. The requirement in Austin is 7 ACH50, Passive Haus standard is .6 ACH50. My company goal is to get down to 1 ACH50 over the next year. I think OC EC is better than foam for 2×6 walls because you get a higher R Value for less money spent. I don’t see there to be any potential for sag in the blown fiberglass, it’s installed very dense. Best, Matt