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  1. #1
    Join Date
    Jun 2009
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    22

    Attaching R6 flexible ducts

    Just had a complete new system put in. New furnace was moved to the attic. Is it acceptable to secure the R6 flexible duct to the cans, tee ys, dampers etc. with heavy duty zip ties and nothing else?

    Thanks

  2. #2
    Join Date
    May 2007
    Location
    Dry as a bone Tucson
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    4,505
    Quote Originally Posted by dbahz View Post
    Just had a complete new system put in. New furnace was moved to the attic. Is it acceptable to secure the R6 flexible duct to the cans, tee ys, dampers etc. with heavy duty zip ties and nothing else?

    Thanks
    No!
    Some Talk, Some Do
    "keeping condensing pressures low and evaporator pressures high"
    "Some customers are more interested in comfort than energy savings"
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  3. #3
    Join Date
    Jul 2009
    Location
    gods country maui
    Posts
    16
    No is right. Now your gonna have supply leaks that cause your house to go into a negative pressure sucking air from every crack and crevice tell them to come out and seal your ducts

    If they say they are sealed enough then tell them to prove it by doing a duct blaster test

    Leaks in forced air duct systems are now recognized as a major source of energy waste in both new and existing houses. Studies indicate that duct leakage can account for as much as 25% of total house energy loss, and in many cases has a greater impact on energy use than air infiltration through the building shell. Just as important, duct leakage can prevent heating and cooling systems from doing their job properly, resulting in hot or cold rooms, and humidity problems. Worse yet, duct leaks can create air quality problems by pulling pollutants and irritants directly into the house.

  4. #4
    Join Date
    Jan 2008
    Location
    MI
    Posts
    38
    Quote Originally Posted by dbahz View Post
    Just had a complete new system put in. New furnace was moved to the attic. Is it acceptable to secure the R6 flexible duct to the cans, tee ys, dampers etc. with heavy duty zip ties and nothing else?

    Thanks
    Yes, this is fine. Only it should be two zip ties for every connection: one for the inner sleeve and another for the outer one. This is a code.

  5. #5
    Join Date
    Jun 2009
    Location
    NAPLES,FL
    Posts
    38

    Cool

    NOOOOOOOOOO, also silver tape and mastic.
    call them back, and have them do it right.

  6. #6
    Join Date
    Jun 2007
    Location
    Round Rock
    Posts
    3,618
    Quote Originally Posted by francosair View Post
    NOOOOOOOOOO, also silver tape and mastic.
    call them back, and have them do it right.
    The right way is zip ties and mastic. Using tape it runs the risk of temperature changes causing the glue on the tape to unstick. (You ever try using UL foil tape when the attic is hotter than crap, it doesn't stick well) If you really want a good seal. Coat the starting collar with a light coat of mastic, slide the inner liner over it. Zip tie it. Put insulated part over it, zip it and apply mastic.
    I like DIY'ers. They pay better to fix.

  7. #7
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,564
    lets not give step by step instructions.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  8. #8
    Join Date
    Jun 2007
    Location
    Round Rock
    Posts
    3,618
    Quote Originally Posted by beenthere View Post
    lets not give step by step instructions.
    Sorry. I figured they can't do too much damage to themselves other than the finger cut from the starter collar and mastic in the hair and clothes. Worst case, their wife will beat their arse from trying to get the dried mastic out of the pants and shirt.
    I like DIY'ers. They pay better to fix.

  9. #9
    Join Date
    Aug 2008
    Posts
    24

    How can wus homeowners know if a job is done correctly...

    if we don't know how it is supposed to be done correctly? Other then to pay someone else big bucks to fix what we already paid big bucks to have done the first time?

    How about a thread (maybe even locked to pros, but visible to all) that shows the top cheats (shortcuts) and pictures of what we should expect our installs to look like so us homeowners can know we are getting what we paid for?

  10. #10
    Join Date
    Aug 2008
    Posts
    24

    Is code good enough?

    Quote Originally Posted by gena View Post
    Yes, this is fine. Only it should be two zip ties for every connection: one for the inner sleeve and another for the outer one. This is a code.
    I believe this was also built to code ... http://www.lib.washington.edu/specia...tnb/fall7b.jpg

    OK, just kidding... But seriously, when we homeowners pay large amounts of money, shouldn't we expect that our systems will be installed in a way that will last for the life of the house? And be done with materials that will not fall apart a day after the warranty is up?

    For example: Code only requires a single smoke detector per level (some areas at least require them in bedroom). But they can use the cheapest (not anywhere near legal to use in commercial) smoke detector. Should we only expect a home builder to use the cheapest materials he can just because it passes code?

  11. #11
    Join Date
    Jun 2009
    Posts
    22
    Thanks for all the replies.
    The contractor said he was going to install the system just like he would at his own home.
    I will insist that he return and do it properly.

  12. #12
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,564
    I was mostly talking to the poster, of the post I deleted.

    You can check out the wall of pride, and the wall of shame, if you want to see some of the differences.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  13. #13
    Join Date
    Jan 2008
    Location
    MI
    Posts
    38
    Bmathews: “Coat the starting collar with a light coat of mastic, slide the inner liner over it. Zip tie it. Put insulated part over it, zip it and apply mastic

    Man, it is just ridicules, it is why you got that mastic:

    “and mastic in the hair and clothes. Worst case, their wife will beat their arse from trying to get the dried mastic out of the pants and shirt.”

    Can you just stop for a while and check it out how tight zip tie actually attaching the liner to the collar?

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