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Chimney Cap or Not

Dale
Dale Member Posts: 1,317
in THE MAIN WALL
Don't use a screen, if the temp at the outlet gets too low the flue products that are high in water content can freeze it shut.

Comments

  • David_54
    David_54 Member Posts: 16
    Chimney Cap or Not

    I have a tall, two flue masonry chimney on my house in SE Michigan. The flue/chimney for the fireplace is adjacent to the flue/chimney for the HWH and steam boiler. Both chimneys are topped with clay ceramic chimney pots. The fireplace pot is covered with a metal pot-topper. The HWH/boiler chimney is in need of a cover new cover, as a result of some recent tuckpointing and masonry repair. Would anyone care to recommend using a screen vs a pot-topper on the boiler stack? Pros and cons?
  • Gordy
    Gordy Member Posts: 9,546
    What ever

    You use make sure it keeps precipitation out, and vermits.


    Gordy
  • Gordy
    Gordy Member Posts: 9,546
    Never had a problem

    With the standard mesh that comes with a SS chimney cap. About 1" to 1 1/4" diamond pattern.

    I do get bees in the flue sometimes. Boy they hate the first fire of the season.


    Gordy
  • Bob Harper
    Bob Harper Member Posts: 1,083
    more to it

    If you know you need some repairs you probably should get a Level II inspection first. If the flue is unsuitable for the class of service then you need more than just a cap. Most probably, you will be needing a listed chimney liner, which comes with its own cap. You want a cap that can keep animals out but is not too restrictive.
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