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  1. #1
    Join Date
    Jan 2016
    Posts
    1

    Default Ceiling Insulation

    I have a second floor bedroom that does not have attic space above it, just the roof. I remodeled a several years ago and insulated the ceiling between the rafters. Shortly thereafter we had our roof redone. The roof contractor said we should not have insulated the ceiling because it could create moisture and lower the life of the shingles. A recent episode of the show showed the crew insulating roof rafters. I am confused. It is time to do some renovating and I am not sure if I need to remove the insulation which would require a complete tear out of the ceiling, drywall included. Any suggestions? I live in Northeast Pennsylvania and we usually have snowy winters. The roof for this room faces north.

  2. #2
    Join Date
    Jul 2010
    Location
    SoCal
    Posts
    7,762

    Default Re: Ceiling Insulation

    When you say "ceiling insulation", what comes to mind is insulation between the joists, which is code.

    "Rafter insulation" done correctly is fine. Correctly means: with baffles (to allow air movement between the roof deck and the insulation, with ridge vent, gable vents and soffit vents. All of the above will prevent moisture, except when there a leak.

  3. #3
    Join Date
    Dec 2007
    Location
    Tennessee
    Posts
    1,986

    Default Re: Ceiling Insulation

    Is this a cathedral ceiling or a flat roof?

  4. #4
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    3,158

    Default Re: Ceiling Insulation

    Do a google image search for "cold flat roof insulation" to get the idea of what DJ said

  5. #5
    Join Date
    Dec 2007
    Location
    Tennessee
    Posts
    1,986

    Default Re: Ceiling Insulation

    One more question, did you use a vapor barrier between the insulation and the ceiling? Normally in a well vented attic, you don't need one, but in a flat roof or cathedral ceiling, it is a must. If you have one, moisture build up will not be as big an issue.

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