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existing flue tile and cutting into them

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Mail4tommo
Mail4tommo Member Posts: 51
in Chimneys & Flues

Lets say i open up a chimney that has 12x12 tile, and there was a 6" hole for the old boiler for example. How would I make that 6" hole lets say 8-10"? If need be? This is hypothetical. I'm curious for down the road if it comes up.

I'm not worried about free space or proper venting of X amount of btus through the chimney at the moment, I'd figure that out if the time come.

Just want to know the process.

Thanks in advance

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 27,276

    Flue tile is actually remarkably fragile — but can be cut with diamond saws.

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Bob Harper
    Bob Harper Member Posts: 1,153

    Since you must seal a clay thimble flush to the inner face of the flue tile, However, since the flue must be suitable for the class of service, just bust out whatever since hole you need, install a stainless steel liner with a ss thimble then cement in around the thimble. Done.

    HydronicMike
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 20,100
    edited 4:10AM

    Hammer and chisel.

    Try to drill it it will break anyhow.

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