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  #11  
Old 08-02-2012, 06:45 AM
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Join Date: Dec 2009
Location: Carlsbad
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Default Re: Under way in Socal

Ok...after some sleep, and a little review on the basics, I think I got this. On page 39, pic 7.6, it shows what I think is correct brick placement at the entry, aside from flaring and a door reveal?

Also John 1/4" gap around the entire circumference seems like a lot? Do the floor and dome really expand/contract that much and at a different rate? Thanks again!
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  #12  
Old 08-03-2012, 10:38 AM
GianniFocaccia's Avatar
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Location: Disneyland, CA
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Default Re: Under way in Socal

Don 't have access to the FB plans at the moment, but the conventional design has the entry bricks match the level of the floor so you can slide pans in and out smoothly. I know some builders have the entry floor a step down from the oven floor, too.

Regarding floor brick expansion, I'm not sure. I do know that if the gap isn't big enough (or there is some errant mortar accidentally left in the gap) an expanding floor can press up against the dome with enough pressure to make it crack.

3/8" would work well I think, but I would definitely go more than 1/8". The gap will quickly fill with ash and you'll never see it.
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  #13  
Old 08-03-2012, 01:17 PM
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Default Re: Under way in Socal

Hi C,

I put a band of cardboard between my floor and sailor course then after the first course I masked of with tape to keep mortar out too. I got the idea from other WFOers. Attached is a pic, if you look hard you can see the cardboard. I am told it eventually burns out and then fills with ash.
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  #14  
Old 08-04-2012, 10:20 AM
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Join Date: Dec 2009
Location: Carlsbad
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Default Re: Under way in Socal

Thanks for all the replies so far! I am laying out my second layer of floor bricks right now and I am leaving a 1/4" gap on the sides for expansion.

A couple of things are coming to mind at this moment:

1. Laying two layers of bricks is presenting me with some unevenness in the last layer. Would the fireclay/sand leveling mix for the first layer work in between as well? I'm assuming that the sand/fireclay mix is essentially just adding more thermal mass (albiet 1/16" thick). My concern is that that leveling layer wouldn't distribute the heat to the bottom layer.

2. I laid out my opening 20" from the OUTSIDE of the dome and it flares to 25". Now when I bring that line to the INSIDE of the dome it necks down..I've already cut one side of the opening so my thought is to just bring the brick straight out for the thickness of the dome and then start the flare. Just to verify though, I want to place the door reveal at the OUTSIDE of the dome?

Thanks again.
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  #15  
Old 08-07-2012, 06:14 PM
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Join Date: Dec 2009
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Default Re: Under way in Socal

I was trolling it IT sticky and Chipster brought up an excellent point with not using a soldier course. He said he sometimes gets his peel stuck in the joint at the floor/dome... So in my case I decided to go out and buy full height bricks, lay the subfloor with splits and put the full height starter on that and go up from there...I'll post it up when I start (hopefully this week!).
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  #16  
Old 08-07-2012, 06:51 PM
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Default Re: Under way in Socal

1st: Congrats on finally getting the oven started with a real completion date.

2nd: (if it's not too late) YES, a GOOD 1/4" is important. I mean, I've not gone into my dome with a micrometer but I just know there is that much expansion and since you appear to be leaning toward a reall soldier coarse (on-end brick surrounding the floor) use the double corrugated cardboard strips to get your 1/4" spacing from the herringbone floor.

Glade you are going with a flaired entry, for the tiny bit more work, you'll be glad you did.

Also, if I had it to do all over again, I would have taken the time to put in an expansion joint like John did, (to isolate the oven from the inner arch and vent box) but it will slow you down to stop and think and do some designing. I get the same way about having a thermocupler in the brick to temp the saturation. But, I don't have them and love the wfo just the same .

Lot's of luck and have fun building it.
-Dino
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  #17  
Old 08-10-2012, 08:40 AM
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Default Re: Under way in Socal

Thanks Dino...now I just have to be militant about sticking to my goal! It's kinda hard when I have ZERO idea of how long this is really going to take. It's like everything else that gets broken down into pieces...you don't realize how many pieces your actually putting together.

I'm still scrubbing through threads to get ideas on the best way to do a thermal break and exactly where. After looking at what seems like 100 threads I've almost come to the conclusion that:

1. If you screw up the break by design or execution, you run the risk of having a seive of sorts for heat loss.

2. The vent landing floor is part of the oven floor in almost every build I have seen. I would think that this would be the biggest potential source for heat loss and everyone's oven seems to be holding heat.

3. The extra thermal mass in the vent arches is not that big of a deal as long as you have an outer arch and chimney brick with at least an airspace between, if not insulation.

Heck, I'm still trying to wrap my head around how to cut the bricks at the entry vent so I'm almost outthinking my own build...crazy....

Thanks again for all the help!
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  #18  
Old 08-10-2012, 10:56 AM
WJW WJW is offline
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Default Re: Under way in Socal

For what it's worth on the gap between floor and walls...I did not leave a gap near the back wall and I have no doubt that's what caused the crak in the pic below...



Doesn't affect performance or structural stability because behind the bricks are four inches of insblock 19 ridgid insulation and eight inches of block and rebar...nowhere for anything to go, but I'd certainly prefer that it weren't there.

Last edited by WJW; 08-10-2012 at 10:59 AM.
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  #19  
Old 08-11-2012, 08:47 PM
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Default Re: Under way in Socal

Does this look right for the vent brick layout? I'm concerned with cutting the bricks to be less than 4 1/2" to accomodate the flare and having a straight spot of 8" or so towards the dome...I know I need to modify/cut my bricks for a reveal but wanted to make sure I was on the right track. Thanks!!
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  #20  
Old 08-11-2012, 11:46 PM
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Default Re: Under way in Socal

Quote:
Originally Posted by cnicholson View Post
Does this look right for the vent brick layout?
I may be WAY off base but are you referring to the entry layout? If this is your vent I need more wine
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