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  1. #1
    Join Date
    Oct 2002
    Location
    Southeast Ohio
    Posts
    379
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    Hmm Insulating fire dampers

    Do you insulate fire dampers in the wall or just insulate to wall? I saw some that had some type of insulation sprayed on them THOUGHTS?

  2. #2
    Join Date
    Oct 2016
    Posts
    653
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    Just to the wall. You should install per the iom which has the opening framed slightly larger than damper size. Angle over lap by one inch...

  3. #3
    Join Date
    Jul 2018
    Location
    Wisconsin
    Posts
    337
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    Hilti makes some nice firestop products. Caulks, blocks, puttys, sleeves ect...

    Sent from my SM-G920R4 using Tapatalk

  4. #4
    Join Date
    Oct 2016
    Posts
    653
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    Local code dictates when a wall needs a fire damper. When a fd is needed, install per the iom. You don’t need any fire caulk product, and certainly no insulation through the wall.

  5. #5
    Join Date
    Jul 2018
    Location
    Wisconsin
    Posts
    337
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    The only fire damper work I do is helping our tinners in hospital work. Our hospitals our inspected by Joint Commision. As far as I know ducts passing thru a fire wall must be wrapped in angle iron, caulked and properly labeled.

    Sent from my SM-G920R4 using Tapatalk

  6. #6
    Join Date
    Oct 2016
    Posts
    653
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    Caulk not required...caulk is “allowed”, but really more a problem. Check out Ruskin dot com install directions.

    Ruskin is one brand. Really need to check the iom of the brand you are installing.

  7. #7
    Join Date
    Jun 2006
    Location
    Charlotte, NC area
    Posts
    113
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    Fire dampers must be installed exactly as indicated in the manufacturer’s instructions in order to achieve the required fire rating. Some have angle on one side of wall or other variables regarding gaps, caulk, etc. The MFRs instructions are how the damper was UL tested.

    I am not aware of any with insulation inside the wall. Usually just up to each side.

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