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  1. #1
    Join Date
    Nov 2012
    Location
    Worcester, MA
    Posts
    16

    Duct leakage questions

    Do you guys duct seal and/or tape the seams of the snap lock on ductwork?

  2. #2
    Join Date
    Nov 2012
    Location
    Worcester, MA
    Posts
    16
    Anyone?

  3. #3
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Don't do installs anymore but back in the day yes and no. Should you? Yes. It's a very cut throat market in residential. 9 times out of 10 the low bid gets the work and I promise you his bid will not include duct sealing.

  4. #4
    Join Date
    Apr 2010
    Location
    NC Sandhills
    Posts
    412
    Mastic all seams, better than most duct tape. There is also matic tape but it is cheaper to buy a bucket and brush but a bit messy it you dont give it time to dry before wrapping/hanging.

  5. #5
    Join Date
    May 2004
    Location
    south louisiana
    Posts
    3,319
    I use a combo of paint on mastic & mastic tape.
    depends on what is being sealed & if it has to be wrapped
    or how close duct take offs are on plenums.
    having both on hand makes it simple.
    The cure of the part should not be attempted without the cure of the whole. ~Plato

  6. #6
    Join Date
    Nov 2012
    Location
    Worcester, MA
    Posts
    16
    Ok thanks for the responses. I personally prefer to duct seal it with paint on mastik because its the cheapest, but sometimes i use the foil tape, i would never use mastik tape its like $40 a roll. My boss insists we do it though i was just curious because i had the theory that its not a leak spot unless you undersize your ductwork. The way i see it is that the air wants to take the path of least resistance which is down the duct to the supply or return, why would it want to fight its way through a tiny crack if the duct isnt undersized.

  7. #7
    Join Date
    Apr 2012
    Location
    winnipeg
    Posts
    1,330
    Quote Originally Posted by Datsik View Post
    Do you guys duct seal and/or tape the seams of the snap lock on ductwork?
    what for...... and never
    it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair

  8. #8
    Join Date
    Dec 2003
    Posts
    2,432
    some of us just care that much....

  9. #9
    Join Date
    Apr 2012
    Location
    winnipeg
    Posts
    1,330
    where do you think the leakage goes...... outside.... don't think so...... done hundreds of houses zero problems ....and zero foil tape....lol
    it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair

  10. #10
    Join Date
    Dec 2003
    Posts
    2,432
    Umm yes.... it leaks outside..... Thats why we seal the ducts....mastic is better than foil tape...lol

  11. #11
    Join Date
    Apr 2012
    Location
    winnipeg
    Posts
    1,330
    Quote Originally Posted by bigtime View Post
    Umm yes.... it leaks outside..... Thats why we seal the ducts....mastic is better than foil tape...lol
    o.k ...seal away....
    it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair

  12. #12
    Join Date
    Dec 2003
    Posts
    2,432
    will do..... and its not just because of pride.....its cause its code....

  13. #13
    Join Date
    Apr 2012
    Location
    winnipeg
    Posts
    1,330
    I hear ya not code hear on residential....commercial sometimes depends on the engineer..... i don't disagree with you just not common practice here...
    it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair

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