Brick chimney to metal flue

[V-wiz]

Re: Brick chimney to metal flue

Flue gas is also highly acidic.

Yup, and combustible. Ask me how i know. My profession involves construction and inspections for a restoration company. I am very familiar with that. Ill just have to clean the flue every few years, or if i have to ill shell out another $140 and have another one made.

[V-wiz]

Re: Brick chimney to metal flue

I thought the outside was painted with high temp already..you definitely should coat the inside of that chase.

Not only the soot, but the temperature fluctuations are going to create condensation, the heat will negate the galvanized finish in a relatively short time.

Yes, the outside is painted with high temp paint. Thanks for the info, i will also coat the inside.

[V-wiz]

Re: Brick chimney to metal flue

The reason stainless is recommended is that heaps of people using galvanized have had to replace their flues after a few years service. Some prayer may help.

Using stainless would have been very expensive for this application, but i would have loved to use SS, sure. Prayer always helps

[Tscarborough]

Re: Brick chimney to metal flue

Flue gas is also highly acidic.

[david s]

Re: Brick chimney to metal flue

The reason stainless is recommended is that heaps of people using galvanized have had to replace their flues after a few years service. Some prayer may help.

You could fabricate and fit an inner sleeve in stainless.

[stonecutter]

Re: Brick chimney to metal flue

I just may spray the inside as well. Are you referring to the rust from the build of the soot/acid?

I thought the outside was painted with high temp already..you definitely should coat the inside of that chase.

Not only the soot, but the temperature fluctuations are going to create condensation, the heat will negate the galvanized finish in a relatively short time.

[david s]

Re: Brick chimney to metal flue

It is 24 gauge galvanized. It should be fine

The reason stainless is recommended is that heaps of people using galvanized have had to replace their flues after a few years service. Some prayer may help.

[V-wiz]

Re: Brick chimney to metal flue

The inside is going to get rusty pretty quick if you don't coat it with high heat paint.

I just may spray the inside as well. Are you referring to the rust from the build of the soot/acid?

[stonecutter]

Re: Brick chimney to metal flue

The inside is going to get rusty pretty quick if you don't coat it with high heat paint.

[V-wiz]

Re: Brick chimney to metal flue

Hopefully, that's not galvanized sheet metal. It dies look nice.....

It is 24 gauge galvanized. It should be fine

[stonecutter]

Re: Brick chimney to metal flue

Hopefully, that's not galvanized sheet metal. It dies look nice.....

[V-wiz]

Re: Brick chimney to metal flue

Had a chimney custom made to fit my exact needs/application. All this cost me $140, which is an amazing price. I will also make sure to strap it down properly due to the height.

[V-wiz]

Re: Brick chimney to metal flue

Thanks for the advice. Ill post a picture of the flue later when i get a chance

[Gulf]

Re: Brick chimney to metal flue

Thanks guys, i will add a few rows of brick so that im above the roof however i will not got up all the way with bricks. That is why i plan on using a metal flue. So i will add a few rows of bricks so i can install a flashing, then will install a flue, with the proper transition.

Just one more piece of advise from me. Just my opinion, mind you. You only have one brick thickness of solid brick. Not great for attaching a pipe that will extend 2 feet above the adjoining gable. I'm just guessing but, that looks like a minimum of about 8'. Since you don't plan to add much more masonry heighth, think about adding guy wires to your flu pipe. Another option would be to pour in place, a custom concrete transition from which to anchor the 12" X 12 to 8" round. Either (or both, the better option) would help to relieve some of the wind load stresses. Around here we have to plan for hurricanes, extreme thunderstorms and worse. Don't ya'll have something called the Santa Ana winds?

[TropicalCoasting]

Re: Brick chimney to metal flue

I would tweak it as you described, using the flashing to get the 8" pipe on.
If you run this into the course below the roof line then continue the bricks to at least the roof line and higher, if you have enough just to make it look good.
Then you get bricks and insulated flue without seeing the flue from below when your cooking and hanging.
I dont know your codes re combustibles and chimneys,but there is nothing some cement sheet and/or moving of noggins cant fix.