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liner/flue extender

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by brian89gp, Nov 8, 2012.

  1. brian89gp

    brian89gp Feeling the Heat

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    I have a 6" SS insulated liner, will I have creosote buildup problems if I put a 18" tall metal flue extender on top of the chimney? Being uninsulated and directly exposed to air makes me curious.

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  2. brian89gp

    brian89gp Feeling the Heat

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    And if it is a flue fire hazard, is it that big of a deal being only the top 18"?
  3. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    Why does it need to be extended? Do you have drafting issues?
    What exactly do you mean by a metal flu extender? Is this a masonry chimney? If it is, you are going to have to add a section of Class A to be code compliant. That won't be any different than any other Class A chimney at that point. To do it, you will also have to add an adapter plate, & connect the liner to that plate. The adapter will have to be anchored to your existing masonry, & then the Class A mounted on the plate. Add a cap & you're done. As long as your wood is dry, you should be good to go...
  4. brian89gp

    brian89gp Feeling the Heat

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    This one:
    http://www.rockfordchimneysupply.com/rockford.php?p=FlueExtender
    Attaching to one of these:
    http://www.rockfordchimneysupply.com/chase-covers.php


    The reason:

    I am in the process of re-topping a masonry chimney. I took it down below roofline and am building it back up and it is going a lot slower then I would like, and there is bad weather coming in followed by freezing weather. By using an extender means I can make the masonry chimney 18" shorter which is about a days worth of work for me.
  5. pen

    pen There are some who call me...mod. Staff Member

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    There is no great way of doing this w/out building up that chimney appropriately. Since you are working on this chimney anyway, it simply should be done right now so you aren't kicking yourself later.

    pen
  6. mellow

    mellow Resident Stove Connoisseur

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    That will work fine for a temporary solution
  7. brian89gp

    brian89gp Feeling the Heat

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    Found an top plate adapter to convert between flex SS liner to class A pipe, it slips into the inside of the flex liner and attaches with screws then the class A side has the twist lock that goes on top. The masonry chimney with 38' of SS flex will be up to the roof ridge then the class A pipe will extend the remaining 2'.

    The ridge of the roof is 50' off of the ground with good 12/12 roof slope, if I can save a day (2' of brick) I will.
  8. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    That's the correct way to go, if you're not gonna brick to the top.
  9. pen

    pen There are some who call me...mod. Staff Member

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    Got a link? I've looked and not been able to find that.
  10. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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  11. pen

    pen There are some who call me...mod. Staff Member

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  12. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    No, but there are hearth shops that carry them, at least up here in the Vampire state. They can be used for thru the roof extensions on masonry chimneys, too. That's where I started using them...
  13. brian89gp

    brian89gp Feeling the Heat

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  14. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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  15. pen

    pen There are some who call me...mod. Staff Member

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    If this is the product, I don't see there being a way to connect the single wall to it. [​IMG]
  16. DAKSY

    DAKSY Patriot Guard Rider Staff Member

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    There's a corrugated extension that comes off the bottom of the plate & that fits inside the SS liner. The liner is secured with to that extension using "Zip" screws...I think you can see it better in the EXCEL version...
  17. pen

    pen There are some who call me...mod. Staff Member

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    Got it, I was expecting a band clamp.

    Thanks
  18. brian89gp

    brian89gp Feeling the Heat

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    Thats what the Rockford guy said, there is an extension on the bottom that will be a snug fit to the inside of the flex liner and to attach the two together with screws.

    If I had only known about this product before I would have terminated the masonry chimney in my attic into one of these and then straight class A through the roof.
    DAKSY likes this.

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