pompeii oven construction began today

[arevalo53anos]

Hi, again:

Looking here, by similar posted pictures, I saw better series in the thread ? detailed vent/chimney photos by Les Dale - .
You would like to take a look there, for more details.
Regards

[arevalo53anos]

Hi, friends

May be this helps.
Regards

[paulages]

thanks james, i'll check it out. i was thinking of using T.C. or brick. i did this:



...to give my brick/ or terra cotta chimney something to sit on. i figure this way, i could potentially build a brick chimney straight up, leaving the front edge exposed for asthetics.

[james]

Just one comment here. Using a terra cotta is very widely done and works great. Our local brickyard has a couple of different sizes.

James

[Marcel]

Clay liner for chimney flue

#48

(M)
Quote:
Originally Posted by Les Dale
Marcel - Thanks for the info. I saw your post about the chimney / vent on the other forum. This guy - arevalo53anos - has some pretty good detail on his chimney made from brick. They are somewhere on this site.

Les...






(M) Luis, a Brazilian engineer with whom I've been in private contact, uses a clay liner for a flue. I'm not sure if there are pictures of brick covering it, or if he has even chosen to so build, but you are correct if you are implying that he used no metal for the transition. I think his damper, made of a piece of sheet metal that slides between the bricks is a super idea! Closing it almost completely could help smoke meats at a lower temperature.

(M) btw, I feel that our private correspondence at this point is helpful for the larger community. Would you consider OK ing my Copy-Pasting this exchange?

Ciao,

Marcel

(L) Re: Luis Arevalo uses a clay liner. No problem - I usually go offline to reduce the chatter - but you are right, any bit of info may help someone.

Les...

(M) I probably will bypass the clay liner, partly because I haven't found any source close by, partly because any liner, clay or steel, forces me to conform to it's shape when cladding it, and partly because brick is less susceptible to breakage.

Ciao,

Marcel

P.S. Thanks, Paul for your clarification, above.

[paulages]

thanks bob. yeah, patience is not my greatest virtue... i really like the look of the fully enclosed ovens. it really looks authentic. but there are some great looking examples of igloo-style ovens out there (robert musa for example).

i found this pile sitting out in the rain and decided to put it to use.


i do like the idea of complete masonry construction. as someone mentioned in another thread, if it's worked so well for the greeks, italians, lebanese, etc...for so long, it oughta last in my backyard.

so gimme a little while, and i'll be back with my revised vent/chimney pictures.

[Bob C]

Paul,
I'm glad to hear that you've been using it right along. I like the arched vent also. Very good work! Personally, I'm having trouble deciding on my finish. I like the look of the "igloo" but I think a complete enclosure would be a better served as a shield against New England winters. AAAAGGGGGHHHH!

Bob

[paulages]

marcel,
i think it's only critical if you are concerned with having all of your smoke go up the chimney. contrary to bob's belief, i haven't been patient at all, and have been cooking in it with no vent for quite some time. it works great, but i need a roof.

i'm gonna consider the ideas here for that galvanized section today. i'd like that section to be structural as well as just a vent--that is, i'd like it to be able to hold up the chimney. i was planning on wrapping it in chickenwire and coating it with a couple of inches of the insulcast, but this would only achieve the latter and not the former. i'm gonna check out ceramic sections today. i sure as hell don't want to ever have to take anything apart on this and repair it!

[Marcel]

Insulating transitional heat duct, and vent size.

From the look of it, that thin wall galvanized item is for heat duct use rather than flue service. If it were me, I'd plan on it's corroding out, and coat it with a couple of inches of refractory cement, using the flue as a form, leaving you a good flue transition after the flue rots through.

In wood stove instalations, the single wall stove pipe rots out in maybe three heating seasons, and has to be replaced, and I think that's thicker gage than what you've used.

================================================== ===

#47

(M) Paul, I would guess you are planning on following through on Demon's suggestion but instead of refractory cement, how about a perlite based insulating concrete on top of chicken wire. I suspect that that lower area of the vent would wick a lot of heat away and insulating it might be an advantage? ___

================================================== =====

(M) On a related issue, there has been a lot of interest generated over the question of vent and flue size so I'd like to offer this question for everyone's consideration:

(M) If many early, and some late model ovens have *no* vent &/or chimney but simply let the smoke out the entrance, doesn't that suggest that the whole issue of vent-chimney size is not that critical? ___

Ciao,

Marcel

[svtlightning]

Paul

The arch vent looks great.

I was concerned that the galvanized pieces would outgas when the oven was fully fired and exposed to high temp for extended periods. But now that I have a temp gun, the temps are not as high as I expected. I don't think it will be a problem.

Mike

[Bob C]

I think it would be interesting to see what size flue is being used on all of these ovens we are building...I have two sections of an 8" x 12" flue and it works fine...I'm wondering if a smaller flue would work even better...
Let's here some responses.

Bob

[Bob C]

Paul,


your oven looks great...I wish I had the patience that so many of you have...not that I'm unhappy with mine...I just decided to start using mine before it was completely finished. But again, great work and fantastic support you provide to others.

Bob

[dmun]

Am i shortsighted for using that galvanized section instead of ceramic, when the steel will eventually corrode?

From the look of it, that thin wall galvanized item is for heat duct use rather than flue service. If it were me, I'd plan on it's corroding out, and coat it with a couple of inches of refractory cement, using the flue as a form, leaving you a good flue transition after the flue rots through.

In wood stove instalations, the single wall stove pipe rots out in maybe three heating seasons, and has to be replaced, and I think that's thicker gage than what you've used.

[paulages]

and yes, clarification: metalbestos is 3' doublewall insulated chimney sections (8" interior diameter).

[paulages]

we'll see...i don't want to fire it up too soon to see how it draws, but i also don't wat to wait until the roof is finished and discover i have to remodel. i'll give it a couple of days and then fire it up. actually (not sure whether this is good or not ) the top four or five bricks on the front of the arch were so tight i couldn't fit ANY mortar in. they are completely dry laid, with mortar packed on top. i figure the weight of the chimney will help hold it solid along with the wonderboard that will surround it to make the walls.