existing flue tile and cutting into them

Mail4tommo

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

Jamie Hall

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

Bob Harper

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.

EBEBRATT-Ed

Hammer and chisel.

Try to drill it it will break anyhow.