Attic vermiculite is ~R14, desire R-49

Discussion in 'Insulation and Radiant Barriers' started by soparklion11, Jan 4, 2020.

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How would you get the attic insulation to R-49?

This poll will close on Jan 25, 2020 at 5:50 PM.
  1. Remove vermiculite and replace with new insulation

    0 vote(s)
    0.0%
  2. Roll out fiberglass over the existing vermiculite

    3 vote(s)
    75.0%
  3. Blow insulation over the existing vermiculite

    1 vote(s)
    25.0%
  1. Jan 4, 2020 #1

    soparklion11

    soparklion11

    soparklion11

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    My brother's house in Pennsylvania has asbestos-free vermiculite in the attic rafters to ~7 inches, which translates to R-14. The recommended level is R-49. Thank you!
     
  2. Jan 5, 2020 #2

    Sparky617

    Sparky617

    Sparky617

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    If you have easy access you could do rolls of fiberglass. Otherwise blown insulation. However, in either case you want to make sure you don't block any eaves vents by installing channels to keep them open. Go with unfaced fiberglass if you use rolls. No need to remove the vermiculite, it is still providing insulation and if you know it doesn't have asbestos in it there isn't any problem leaving it. Removing it would be a huge mess.
     
    Jeff Handy likes this.

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