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  1. drx006

    Basement XPS insulation gaps

    Thanks again. Sure glad I posted here! This has been very educational and extremely helpful!
  2. drx006

    Basement XPS insulation gaps

    Ok thanks. My wife will be glad to hear that. She wants to leave it as it is and seal with Mastic. So the 2 inch deep space doesn't factor in the cubic inches calculation? Just the 1/8 inch gap width x 8 foot height? It's amazing the detail that needs to be addressed rather than just...
  3. drx006

    Basement XPS insulation gaps

    I really appreciate you taking the time to answer all my questions? Do you think the benefit/cost of taking down the panels to seal the foams gaps(I have 33 gaps total) is worth any benefit gained or do you think I should just seal the OSB with the fiber mastic you suggested earlier? If it was...
  4. drx006

    Basement XPS insulation gaps

    Thanks for the info on the Great Stuff isocyanates. That makes me rethink using it alittle. If I decide to go with the Backerseal, does it matter that it is open cell foam between closed cell XPS foam. I read that open cell foam is more susceptible to moisture.
  5. drx006

    Basement XPS insulation gaps

    PRODUCT NAME : GREAT STUFF (TM) PRO Window and Door Gun Foam Sealant 20 OZ HC MATERIAL TYPE : One component system ISSUE DATE : 07/19/2007 REVISION DATE : 05/09/2007 2) COMPOSITION/INFORMATION ON INGREDIENTS Ingredient CAS Number % Prepolymer of MDI and mixture 40-70, 60-100% Polyether...
  6. drx006

    Basement XPS insulation gaps

    One more question. If I decided to take down some of the panels to fill the gaps could something like this work? http://www.emseal.com/products/Architectural/Backerseal/Backerseal.htm Or maybe cutting strips of 2 inch thick XPS to stuff in the gaps and then covering it with the fiber mastic...
  7. drx006

    Basement XPS insulation gaps

    Thanks for all your help.
  8. drx006

    Basement XPS insulation gaps

    Can I use the mastic to seal the tops and bottoms of the XPS as well instead of using sprayfoam?
  9. drx006

    Basement XPS insulation gaps

    Is there a recommended mastic for OSB? Should I use fiber reinforcement tape with the mastic?
  10. drx006

    Basement XPS insulation gaps

    Thanks. I was planning on using 4x8 sheets of 1/4 inch paneling. Would that be ok if I staggered the seams over the mastic sealed seams of the OSB.
  11. drx006

    Basement XPS insulation gaps

    Thanks for you help! It is below grade on an interior walkout blockwall foundation that is eight feet tall. Foundation is concrete block (8 inch) with full bricks mortared on the exterior. The panels are 2 inch of XPS and about 1/2 inch of osb with shiplaped edge on the osb. It is actually...
  12. drx006

    Basement XPS insulation gaps

    Hi I have these panels of XPS covered with OSB. The OSB is shiplaped and is a very tight fit. However the xps behind it has 1/8th gaps at the seams. Is it necessary to fill these seams if the OSB is tightly sealed over the seams. Here are some pictures.
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