#1  
Old 05-04-2014, 07:53 AM
Serf
 
Join Date: May 2012
Location: Marquette, MI
Posts: 1
Default First Course of Brick

Hello all,

I have finished building my stand and over floor and now I am getting ready to start my first course. One question I have which seems to be absent from the instructions is whether or not I should mortar the first course on the bottom of the brick? I chose to build the floor out big enough so that the first course will be on top of the herringbone floor. Any help here would be much appreciated. Also for the entryway did you mortar your first course of brick on each side to the floor?

If it matters I have the floor on top of the fiber board purchased from FB.

PS I am in the UP of Michigan and this is a hold over project from last year and I am very anxious to uncover the oven and get going!
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  #2  
Old 05-06-2014, 08:37 AM
boerwarrior's Avatar
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Join Date: Apr 2013
Location: Santa Rosa, CA
Posts: 450
Default Re: First Course of Brick

It is common (at least that's what I did!) to place the soldiers bricks directly on the fiber board and then have the floor bricks inside of the soldier wall. In that case there is no mortar between the soldiers and the floor bricks and in fact most people leave a small expansion gap.

That said, I don't see why your design wouldn't work... I would only mortar the soldiers to each other and not mortar them to the floor. It seems that would allow a little expansion. But others may have opinions and weigh in
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Old 05-06-2014, 04:35 PM
Apprentice
 
Join Date: Apr 2014
Location: South Carolina
Posts: 126
Default Re: First Course of Brick

My first course is just sitting on the cooking floor, no mortar.

From the picture, it looks like your arch form is at the full height. You may want to cut an inch or so off the bottom and prop it up with wedges. When your done with the arch, you pull the wedges and the form drops right out.
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Old 05-06-2014, 04:55 PM
ogorir's Avatar
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Join Date: Aug 2013
Location: Waco, Tx
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Default Re: First Course of Brick

I mortared my first course directly to the floor brick, but I didn't do a soldier, just straight into the dome.
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Old 05-06-2014, 05:24 PM
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Location: Salt Lake City, Utah
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Default Re: First Course of Brick

Up,

You have a choice of place your soldiers on the floor on or on the insulation. If you are enclosing the oven then placing on the floor will save a lot of floor cutting. If you are doing a dome and want that shape all the way to the base then probably need the cut the floor brick to fit inside the dome. In either case, like Boer and Hub said, the first course should "not" be mortared to the floor only mortar the vertical joints. You want some expansion ability for the dome and the floor.
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Old 05-06-2014, 09:54 PM
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Location: Seattle
Posts: 1,398
Default Re: First Course of Brick

UP -
Another vote here for no mortar under the bricks. The weight will hold it.

One comment on your arch design - it's easier to tie your dome into the arch if you build it as a true arch rather than an axed arch (that's what your current design is called). Check out John (Gianni Focaccia) or Russell's (Utah Beehiver) for good examples of that design. You can check mine for somebody who started on the path you are on, changed his mind, and is glad he did!
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Old 05-06-2014, 10:16 PM
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Default Re: First Course of Brick

Quote:
Originally Posted by deejayoh View Post
.......
build it as a true arch rather than an axed arch (that's what your current design is called).
What do you mean Deejay?
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Last edited by stonecutter; 05-06-2014 at 10:20 PM.
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  #8  
Old 05-06-2014, 10:31 PM
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Default Re: First Course of Brick

like this

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Old 05-07-2014, 05:20 AM
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Default Re: First Course of Brick

I just want to be clear, for the sake of using proper terminology. You said to build a true arch, then you mentioned an axed arch. Your picture shows a semi circular arch which is has cut brick voussoirs and the OP shows centering for a segmental arch, no voussoirs in place.

So if you please, ( to satisfy my irritating curiosity ) when you said true arch, were you referring to the shape of the voussoirs or the shape arch? As far as the obvious joint size difference comparing a fine axed arch VS a rough arch, it matters little in structural strength for a wfo if the voussoirs are cut or not. The biggest reason to shape voussoirs is aesthetics ....and the arch in your pic is very nice.

Also, if the voussoirs in your pic have been cut on lines that radiate from one center, then that is called a Gauged Arch... Not an axed arch.
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Old 05-07-2014, 07:46 AM
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Location: Tallahassee, FL
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Default Re: First Course of Brick

Up_mambo,
Glad to hear the snow has melted up there. Stonecutter gave me a great tutorial on building a Roman Arch entry. Check post #346 in this thread.

http://www.fornobravo.com/forum/6/36...tml#post156902 (36" build in Tallahassee - AKA Bruce's Folly)

While I wouldn't suggest my build as a sterling example of great technique, it does show that with the help of this forum, a working WFO can be built by someone without any experience with bricks and mortar. Good luck and I hope you can finish before the snow starts again. BTW, I grew up in Detroit.
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