#121  
Old 04-10-2010, 07:56 AM
Il Pizzaiolo
 
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Location: So. Orange County, CA. USA
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Default Re: SC Chris's 42" WFO build

Yesterday with the help of windage I was able to find a cut off piece of 3cm soapstone for the exterior entry, $55. Dino lamented sometime ago about how to clean the brick surface of the entry and I got to thinking about putting in a single piece of soapstone.

Chris
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  #122  
Old 04-10-2010, 02:37 PM
Il Pizzaiolo
 
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Default Re: SC Chris's 42" WFO build

This I was able to fit the soapstone to the entry this morning with the help of a grinder obital sander and the trusty HF10. I had hoped that I might I could use my circular saw to get the cuts, no luck here.. I could have made it work with a diamond blade. I didn't have one handy for this saw. I was able to trim the mini slab down to close and then the HF10 made the rest of the cuts. I sanded using an orbital sander with 120 Grit, I didn't have any 80.

I beveled the rear of the slab, the entry to the oven, to better match the brick floor.

Chris
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SC Chris's 42" WFO build-sstone1.jpg   SC Chris's 42" WFO build-sstone2.jpg   SC Chris's 42" WFO build-sstone3.jpg   SC Chris's 42" WFO build-sstone4.jpg   SC Chris's 42" WFO build-sstone5.jpg  

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  #123  
Old 04-10-2010, 07:00 PM
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Il Pizzaiolo
 
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Default Re: SC Chris's 42" WFO build

Hey, that makes a beautiful oven landing. The soapstone looks great.

Your standing rib roast and endive gratin sound great. We do a rib roast a few times a year for family gatherings, never had the opportunity
to do it in wfo. Can't wait to try it out.

Your father in-law will be so happy with the oven when he sees it. I think it really impresses our European families when they see something so old-world in our new-world.

-dino
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  #124  
Old 04-11-2010, 07:02 AM
Il Pizzaiolo
 
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Default Re: SC Chris's 42" WFO build

Thanks Dino.
The stone wasn't that hard to cut and fit but it was heavy and a bit too big for the HF. On the FIL coming to town, I'm sure it'll make his day to either enjoy the food and or share his stories and WFO insights. :-) His trip is a belated 80th Bday gift from my SIL and her family and us..

Chris
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  #125  
Old 04-11-2010, 02:12 PM
eprante's Avatar
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Default Re: SC Chris's 42" WFO build

Chris,
Did you take the bricks out of the landing area and replace them with the soapstone? If so, then I get it with the transition.

I put a layer of FB blanket over my oven this AM. That is some serious stuff. I got home from surfing, the temp of the blanket was 140, the outside of the dome 503. Nice stuff James.

Yes, send me the info on your soapstone source.

I am cooking bread, chicken, and roasted vegetables in the oven tonight.

Eric
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  #126  
Old 04-11-2010, 03:37 PM
Il Pizzaiolo
 
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Default Re: SC Chris's 42" WFO build

Eric Congrats on the cooking, I'll be doing the same menu.

As for the SStone in the entry, you got it. I took the bricks out and cut them flush to the outer side of the dome entry. At this point all I had was the 2" insulating board from this point out. I cut a spare piece of 8" wide SStone to a 1/4 inch shy of the outer door jamb where the door slides into and stops , where the sidewalls die. This 8" wide cutoff is the support for the slab and it also provides an air stop to keep the cold air from running under the floor where the door sits. at the front of the slab, more spare SStone support runners sit. Since the double thickness of SStone is 2.5 inches, a 1/4 inch higher than the firebrick, I beveled the SStone to transition to the brick.

It's funny how blue the soapstone stone dust is, I wouldn't have guessed looking at the slab that there is so much blue in there.

Chris

Last edited by SCChris; 04-11-2010 at 03:43 PM.
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  #127  
Old 04-12-2010, 08:24 PM
Il Pizzaiolo
 
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Default Re: SC Chris's 42" WFO build

Ok here is a preliminary report on the Soapstone entry:

I not completely sure at this point but I think the heat retention after the soapstone install isn't as good as with the firebrick. In short, I think the SStone under the door is wicking the heat out faster than was the traditional brick floor.. Here is what I'm seeing. Last night I made 4 pizzas, my best to date, and corked the door. The fire was at the end, but my expectation would be that I should have had 450F or so when I got home. No such luck, I was at 350F. I know that my oven was on the down slope of heat and I may over guessing things. I'll do another check this week. I have some hearth bread to get cooked before Friday. If the SStone is acting as a conduit for the heat under the door, then the question is what do I do about it? I do like the clean surface of the entry. I may cut it back 2.5 inches and run the brick forward, it wouldn't be hard to do.. I'll keep you all posted, it may be next week before I'm sure.

Chris
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  #128  
Old 04-12-2010, 09:17 PM
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Les Les is offline
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Default Re: SC Chris's 42" WFO build

Chris,

It's hard to believe that it is acting as a heat sink. Your approach is brilliant and solves the staining problem we all have. I wished I had thought of doing this. I was looking at my entry and I think I can remove the front brick (angle grinder required) and replace it with a "cleanable surface". I've been on this forum for some time and it constantly amazes me to see the evolution of the builds.

Les...
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  #129  
Old 04-13-2010, 03:06 AM
Il Pizzaiolo
 
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Default Re: SC Chris's 42" WFO build

Hey Chris,
My soapstone is just touching my firebrick, I havent noticed any heat loss yet,, But wasnt looking for it either. Will have to pay attention now,, I did notice however that during my startup fire the soapstone got over 375 degrees.. which I ws thinking was just from the reflective heat from the fire.. after the heat up it cooled down and was still hot but workable.. you can see in the pic I dont really have much of a contact area

Would you be able to put in an "insulation gap" of some sort between the firebrick and the soapstone ?? some vermicrete,, piece of insulating board etc ??

Cheers
Mark

Last edited by ThisOldGarageNJ; 08-16-2010 at 05:54 PM.
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  #130  
Old 04-13-2010, 07:16 AM
Il Pizzaiolo
 
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Default Re: SC Chris's 42" WFO build

Thanks for the kind words Les. I slept on it and I think there are a few things going on.

1: The oven was on the downslope of the heat curve and I hadn't really run a big fire so I'm sure that the oven wasn't fully heated throughout.

2: I used the door mounted thermometer rather than the IR gun that I had used in my initual baseline readings last year.

3: The SStone is a much more dense material than is the firebrick so I'd bet the R-Value of the brick is higher.

I'm going to have to do a hard, saturating fire in the oven and re-measure the heat loss. I think that a 1" piece of insulating board between the fire brick and the SStone would make a world of difference of heat loss through this area, and I may do this. I may also go by the ceramics shop and get a kiln shelf and use it as a break between the oven floor and the entry. I won't really know what to do, if anything, before I run another baseline.

Chris
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