Extending the chimney clay liner?

[remagenman]

In my ongoing saga of trying to get sh....stuff done around the house I lean on the shoulders of experienced home owners again.

So, my chimney has a concrete cap to block the rain (home built 1973) which needs to come off for a modern metal cap.

Unfortunately the clay liner is flush with the top of the chimney mortar so I have to either extend the liner or figure out some other system.

okay, just went up to my roof and took a picture of the liner, I dont think its clay but concrete. Heres a pic.

 

[Uncle murph]

In my ongoing saga of trying to get sh....stuff done around the house I lean on the shoulders of experienced home owners again.

So, my chimney has a concrete cap to block the rain (home built 1973) which needs to come off for a modern metal cap.

Unfortunately the clay liner is flush with the top of the chimney mortar so I have to either extend the liner or figure out some other system.

okay, just went up to my roof and took a picture of the liner, I dont think its clay but concrete. Heres a pic.

The top of the flue liner doesn’t look like clay to me but I don’t understand why you want to raise it?The top cap has clearly seen better days,if it was me , I would get a piece of stone and set it up there.If you really do need to extend the liner,terra cotta liners are 13 x 13 and easily cut with a inexpensive diamond wheel in a 4” grinder.

 

[Hilltopmasonry]

The top of the flue liner doesn’t look like clay to me but I don’t understand why you want to raise it?The top cap has clearly seen better days,if it was me , I would get a piece of stone and set it up there.If you really do need to extend the liner,terra cotta liners are 13 x 13 and easily cut with a inexpensive diamond wheel in a 4” grinder.

You cannot simply add another clay liner on top of that, because on a windy day, it will blow off, since the joint is above the concrete cap

 

[Uncle murph]

You cannot simply add another clay liner on top of that, because on a windy day, it will blow off, since the joint is above the concrete cap

Where did I say you could? I don’t believe he needs another 2’ and suggested a way to cut it.

 

[remagenman]

After realizing I didnt have a clay liner I'm not planning on extending but just getting a rain cap that will cover the whole top of the chimney, suckers are expensive for not much more than a baking tray with chicken wire!

 

[Jackfre]

What are you venting with this chimney? For the record NFPA 211 regulates the construction of masonry chimneys. Check it put. Without a liner you may have insurance problems if the worst happens. That flue is enormous.

 

[Zeke]

Can you build, or modify a store bought cap, and put it inside of the existing? I'd mainly be concerned with screen.

 

[remagenman]

What are you venting with this chimney? For the record NFPA 211 regulates the construction of masonry chimneys. Check it put. Without a liner you may have insurance problems if the worst happens. That flue is enormous.

Man, I'm getting deeper into the fireplace rabbit hole!

I've never used the fireplace but it came with a Fisher fireplace insert with no steel liner but original cement brick liner, not clay.

From what I have been reading it seems like I need a boot to properly insert a steel liner into, the damper is just a hole with the damper hole going across it, the boot will sit on top of both.

The good new is that I removed the side shrouds and saw that their is a metal pipe coming out the wall thats been capped off, I assume its a natural gas line because I have a natural gas stove outside.