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Old 04-13-2013, 04:42 PM
Peasant
 
Join Date: Mar 2013
Location: Canberra, Australia
Posts: 33
Default New 42'' pompeii build in Canberra

...or should I say 107cm pompeii.

Some pics of my build in Canberra.

I've established there's a special 'Canberra WFO Tax'. Seriously hard to find refractory supplies here in Canberra, and what you can find is significantly marked up on Sydney and Melbourne prices. Would be very interested to hear where everyone in this region has sourced materials from? So far I've got vermiculite from South Pacific Hydroponics in Fyshwick (300L at $45/100L). Wanted to use insulating board, but just couldn't find it here and couldn't be @rsed trekking to Sydney to get some. Looking at getting fire bricks for the cooking floor from Amber tiles in Fyshwick (@ ~ $4.50/brick). Using Canberra Reds for the dome - there's a bloke in Watson who sells them cleaned of old motar - he's in the yellow pages. Had a mate bring back a fire blanket from Melb.


Thanks to tips from the forum, I'm thinking I'll put a thermocouple in the floor and also vent the insulation to assist in drying it out when it rains lots. Other than that, just a standard 42'' build, with waterproof render (no enclosure/roof).

Laid the slab ages ago, and the 100mm vermic/cement (6:1 ratio) insulating hearth yesterday.

Any good dome motar recipes that can be made from easy to find material gladly accepted. I've got two bags of fondu ciment, but at $45/bag from CE Industries in Fyshwick, I'm looking for a cheaper option!

Cheers!

Dan
Attached Thumbnails
New 42'' pompeii build in Canberra-01.-stand-first-course.jpg   New 42'' pompeii build in Canberra-02.-suspended-slab-hearth.jpg   New 42'' pompeii build in Canberra-03.-sam-laurence-like-slab.jpg   New 42'' pompeii build in Canberra-04.-insulating-hearth-formwork.jpg   New 42'' pompeii build in Canberra-05.-floor-insulation.jpg  

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Old 04-13-2013, 05:23 PM
Peasant
 
Join Date: Aug 2012
Location: Michigan
Posts: 48
Default Re: New 42'' pompeii build in Canberra

Great start!
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  #3  
Old 04-13-2013, 08:17 PM
Gulf's Avatar
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Join Date: Sep 2011
Location: Mississippi
Posts: 1,394
Default Re: New 42'' pompeii build in Canberra

Looks great Dan,
I like the forms. I have just one concern. Do you have some type of footing under the pavers that your oven stand is sitting on?
There may be something that I missed on this. I live in an area of sediment and unstable soil. Monolithic footings and slabs are the key here. I realize that there are places in the world that sit on bedrock, etc. that do not need the same support.

Just Sayin'
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Old 04-13-2013, 08:38 PM
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Location: Whittlesea
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Default Re: New 42'' pompeii build in Canberra

Quote:
Originally Posted by Dan W View Post
Using Canberra Reds for the dome -
There is nothing wrong with using solids for the whole build.
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Old 04-15-2013, 12:28 AM
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Join Date: Apr 2007
Location: Adelaide - South Oz
Posts: 560
Default Re: New 42'' pompeii build in Canberra

Dan,
We seem to have plenty of alternative tomato growers in SA so that seems to keep the price on vermiculite down (purely based on rumour)...... Supply and demand on a number of levels I guess.
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Old 04-15-2013, 03:33 AM
Peasant
 
Join Date: Mar 2013
Location: Canberra, Australia
Posts: 33
Default Re: New 42'' pompeii build in Canberra

Thanks all for the comments.

Good point Gulf. Hopefully she'll be right as it's a bit late now - the stand's straight on the pavers! My suburb used to be a dry as a bone sheep station. The soil's basically hard baked clay and the pavers have been laid very well on compacted earth and sand. There's no trees within cooee, so hopefully no big roots will disturb it. Think she'll be right.. but I may be proven wrong in a decade! Hope not!

Brickie - I'm keen to make pizzas and also roast, bake, and slow cook in the oven. You reckon the reds will: a) have enough thermal mass, and b) get hot enough for good pizzas? Those were the reasons I was thinking of shelling out an extra $175odd bucks.

Bacterium - hahaha! I guess the fact that growing, uuh... "alternative tomatoes" is decriminalised in the ACT, every other bloke 'companion plants' in the veggie patch and keeps the price of vermic up around stoopid levels. But you just gave me a good idea on how to fund the cost of the oven! Who ordered the 'special' pizza??!

Speaking of which, I'll post some more pics, but I'm putting in a special wicking garden bed right next to the oven. Space in the garden will be reserved for uber fresh pizza ingredients.. and possibly also some special herbs.
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Old 04-15-2013, 04:05 AM
Bacterium's Avatar
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Join Date: Apr 2007
Location: Adelaide - South Oz
Posts: 560
Default Re: New 42'' pompeii build in Canberra

....Dan I don't think that kind of topping has been suggest yet.

That wicking bed thing is interesting......could use that idea when I extend my veggie patch area.

On the solid reds....yes I successfully used them on my first build here (The "Redgum Roarer" - brick dome oven)

The weakness in my first oven was about underfloor insulation if I did have it and an insulated door I believe cooking bread the next day would have been possible in it.

...anyway this is about your build.... post away
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Last edited by Bacterium; 04-15-2013 at 04:06 AM. Reason: spelling
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Old 04-15-2013, 05:17 AM
david s's Avatar
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Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
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Default Re: New 42'' pompeii build in Canberra

Using solid reds will give you much the same performance as firebricks, but just remember that they have not been designed to heat cycle with fire frequently. The clay used will vary greatly from region to region and you will have no idea if they will be suitable or not. I have seen plenty of fireplaces in Victoria, Australia that had badly spalled solid red bricks, but no doubt there are plenty that can take it too. They should be ok for the dome, but may not be for the floor. If you can afford it use firebrick for the floor at least or if using the reds for the floor make it so they can be easily replaced.
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Old 04-15-2013, 07:07 AM
Peasant
 
Join Date: Mar 2013
Location: Canberra, Australia
Posts: 33
Default Re: New 42'' pompeii build in Canberra

Thanks Damon and David! This forum's just bloody great isn't it?! Advice from all over the world.

So, how's this for a plan: I've already laid 110mm (4.3inches) of vermicrete. Insulating board is either $100+ in shipping alone, or a 400km drive - so I'm hoping this is enough. Planning to lay a sailor course directly on the 6:1 vermicrete - thinking I will hi-heat mortar this down. Will then cut a red brick floor to sit neatly inside the sailor course - Will lay that on a fine layer of sand (no mortar) and see how it goes. Can then replace it with a proper firebrick floor at a later date if the reds are not cutting the mustard.

Damon, your second build is looking awesome. You mentioned you were happy with your hi heat mortar. What mix are you using (apols if you listed it and I missed it - it's getting late)? Do you know if fireclay goes by another name in Australia? I keep drawing blanks when I ask people in this town.

And one last (and potentially naive) question for the hivemind: Seems like a flue and chimney is a lot of work - if I don't care about smoke in the face at light-up, and a blackened entry arch, is it really necessary? My build is out in the open, and I've actually got some powerlines overhead, and I'm guessing the higher the heat vents, the more likelihood I run of messing with those.

David - re: the Canberra reds - local urban lore (or possibly myth) has it that the Canberra reds are up for the task - I've been told they're the WFO brick of choice amongst the local Italian community. And I'm kind of fond on them as they're an early relic of our town, which turns 100 years young this year. They were amongst the first things made in the establishment of our national capital. For anyone interested in the history: yarralumla brickworks
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Old 04-15-2013, 12:23 PM
david s's Avatar
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Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,513
Default Re: New 42'' pompeii build in Canberra

Quote:
Originally Posted by Dan W;150319 Planning to lay a sailor course directly on the 6:1 vermicrete - thinking I will hi-heat mortar this down. Will then cut a red brick floor to sit neatly inside the sailor course - Will lay that on a fine layer of sand (no mortar) and see how it goes. Can then replace it with a proper firebrick floor at a later date if the reds are not cutting the mustard.

Do you know if fireclay goes by another name in Australia? I keep drawing blanks when I ask people in this town.

And one last (and potentially naive) question for the hivemind: Seems like a flue and chimney is a lot of work - if I don't care about smoke in the face at light-up, and a blackened entry arch, is it really necessary?

David - re: the Canberra reds - local urban lore (or possibly myth) has it that the Canberra reds are up for the task - I've been told they're the WFO brick of choice amongst the local Italian community. And I'm kind of fond on them as they're an early relic of our town, which turns 100 years young this year. They were amongst the first things made in the establishment of our national capital. For anyone interested in the history: [URL="http://en.wikipedia.org/wiki/Yarralumla_brickworks"
yarralumla brickworks[/URL]
first up a soldier course is inherently weak because of the vertical joins and a sailor course even worse because they are thinner, but other builders have used this method and got away with it.

A true fireclay as supplied by a refractory or pottery supplier is expensive.i use bricklayers clay which is cheap, but only has around 10% alumina content. It seems to work ok at the temps we use.you should be able to get it at Bunnings.

No you don't need an entry and chimney. In fact there is a huge advantage in not having one. You won't have an entry to work past when using the oven. You can always add one later if you find the smoke an issue.

Sounds like your red bricks could be ok.
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