Yo Jax............Dude.................
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  1. #1
    Join Date
    Mar 2008
    Posts
    205

    Yo Jax............Dude.................

    I found a MAJOR place of intruding attic air into the living space.

    Flue pipe into the ceiling. Not sealed around, hot air just poured in.
    Now its time to begin sealing those registers.

    Congrats on the big$$$$$ savings . Keep in touch

  2. #2
    Join Date
    Apr 2007
    Posts
    6,285
    Should use FIRE RATED caulk. I believe it's red but may com in other colors. may need a flange around it to make it tiger around the pipe if the gap is to large to caulk.

  3. #3
    Join Date
    Jun 2007
    Location
    The Twilight Zone
    Posts
    2,964
    Good job RS!

  4. #4
    Join Date
    Mar 2008
    Posts
    205

    John it was spray foam insulation

    Quote Originally Posted by BigJon3475 View Post
    Should use FIRE RATED caulk. I believe it's red but may com in other colors. may need a flange around it to make it tiger around the pipe if the gap is to large to caulk.
    Dow's Good Stuff or whatever. This might....melt?

  5. #5
    Join Date
    Mar 2008
    Location
    Central Maryland
    Posts
    246
    Quote Originally Posted by RomulanSpy View Post
    Dow's Good Stuff or whatever. This might....melt?
    How about off-gas a nasty smell?

    -HF

  6. #6
    Join Date
    Mar 2008
    Posts
    205

    Well least I have a heads up

    Quote Originally Posted by hangfirew8 View Post
    How about off-gas a nasty smell?

    -HF
    and explanation it wasn't the red beans and rice

  7. #7
    Join Date
    Jun 2008
    Posts
    63
    Quote Originally Posted by BigJon3475 View Post
    Should use FIRE RATED caulk. I believe it's red but may com in other colors. may need a flange around it to make it tiger around the pipe if the gap is to large to caulk.
    Quote Originally Posted by RomulanSpy View Post
    Dow's Good Stuff or whatever. This might....melt?

    Unless this flue is rated to have insulation touching it, you have a fire danger. Check your code, but you typically need a 6 inch offset around a hot flue. A metal collar/flange provides an offset while sealing air leaks in the ceiling. You can use the foam stuff around the outer edges of the flange.

    FIRE RATED ONLY around the inner edge next to a hot flue.

    FOAM IS NOT FIRE RATED!

    Also, build a dam around all hot flues, recessed lights, and other hot spots so insulation will not touch them. Stack batting, or staple cardboard around the hot spot so loose fill does not fall against it.

    congrats on finding a big leak. there may be more. continue your quest.

  8. #8
    Join Date
    Mar 2008
    Posts
    205

    Thanx

    Quote Originally Posted by jax1 View Post
    Unless this flue is rated to have insulation touching it, you have a fire danger. Check your code, but you typically need a 6 inch offset around a hot flue. A metal collar/flange provides an offset while sealing air leaks in the ceiling. You can use the foam stuff around the outer edges of the flange.

    FIRE RATED ONLY around the inner edge next to a hot flue.

    FOAM IS NOT FIRE RATED!

    Also, build a dam around all hot flues, recessed lights, and other hot spots so insulation will not touch them. Stack batting, or staple cardboard around the hot spot so loose fill does not fall against it.

    congrats on finding a big leak. there may be more. continue your quest.
    Time for a trip to Lowes then to the attic. Should be fun w/temps in the mid 90's. Did get most of the foam insulation from the inside.

    I wonder if there's a flange that can be installed to an existing flue. Obviously it'd have to wrap around the flue b/c the flue ain't goin' no where.

  9. #9
    Join Date
    Apr 2007
    Posts
    6,285
    Quote Originally Posted by jax1 View Post
    Unless this flue is rated to have insulation touching it, you have a fire danger. Check your code, but you typically need a 6 inch offset around a hot flue. A metal collar/flange provides an offset while sealing air leaks in the ceiling. You can use the foam stuff around the outer edges of the flange.

    FIRE RATED ONLY around the inner edge next to a hot flue.

    FOAM IS NOT FIRE RATED!

    Also, build a dam around all hot flues, recessed lights, and other hot spots so insulation will not touch them. Stack batting, or staple cardboard around the hot spot so loose fill does not fall against it.

    congrats on finding a big leak. there may be more. continue your quest.

    So what did I say that was wrong?


    Every opening in a structure here has to be sealed off......to meet code. And fire dapers should be used where applicable.


    Jax you have 28 post why not apply for pro??

  10. #10
    Join Date
    Jun 2008
    Posts
    63
    Quote Originally Posted by BigJon3475 View Post
    So what did I say that was wrong?

    What you said is 100% correct BigJon! I quoted what you said and responded to RS's question about what would happen if he left the foam around the flue.

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