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-   -   My first WFO build... (http://www.fornobravo.com/forum/f43/my-first-wfo-build-18673.html)

Mooveebuff 11-30-2012 01:49 PM

My first WFO build...
 
Hi Everybody! I have been reading on here for a long time, but finally registered today so I could post. This is a really big first post, so I apologize for all of the pictures. This has become more of a project than I thought it would be originally, although it's actually been easier than expected (so far!). All I can say is I'm glad I waited until the 100 degree-plus days were over before I started.

Reading all of the posts here have been very helpful, but I figured it would be even better to interact for a change and learn more as I go along here.

Anyhow, here's what I've done so far:

Well, things started off with what was probably one of the most difficult parts so far...digging a hole (a little over a foot deep)! I didn't get a picture of the actual hole, but here it is with about 5 inches of gravel to help with drainage for the rare occasion that it rains out here.

http://i1121.photobucket.com/albums/...n/IMG_2885.jpg


I covered the gravel with about 5 inches of concrete just to have a somewhat solid base. Just laying my bricks out here to make sure I made the slab big enough:

http://i1121.photobucket.com/albums/...n/IMG_2762.jpg


Put in some cinder blocks for support and started building the wall:

http://i1121.photobucket.com/albums/...n/IMG_2763.jpg


http://i1121.photobucket.com/albums/...n/IMG_2766.jpg

Mooveebuff 11-30-2012 03:25 PM

Re: My first WFO build...
 
Continued...

http://i1121.photobucket.com/albums/...n/IMG_2768.jpg


Filled in all the gaps with broken up concrete I got from a guy on Craigslist:

http://i1121.photobucket.com/albums/...n/IMG_2772.jpg


Covered the mess with concrete to get everything cemented in place and give myself a more level surface to work on:

http://i1121.photobucket.com/albums/...n/IMG_2775.jpg

Mooveebuff 11-30-2012 03:26 PM

Re: My first WFO build...
 
Continued...

Built the wall up a little higher to make room for my insulation layer:

http://i1121.photobucket.com/albums/...n/IMG_2797.jpg


http://i1121.photobucket.com/albums/...n/IMG_2798.jpg


Insulation layer - empty bottles set in a mixture of perlite and wood shavings:

http://i1121.photobucket.com/albums/...n/IMG_2801.jpg

http://i1121.photobucket.com/albums/...n/IMG_2802.jpg

Mooveebuff 11-30-2012 03:27 PM

Re: My first WFO build...
 
Continued...

I wasn't a big fan of working with the wood shavings and clay slip, so I switched to perlite and clay slip for the layer covering the bottles:

http://i1121.photobucket.com/albums/...n/IMG_2806.jpg


http://i1121.photobucket.com/albums/...n/IMG_2807.jpg


Evened off the top...just barely covering the bottles:

http://i1121.photobucket.com/albums/...n/IMG_2841.jpg

Mooveebuff 11-30-2012 03:28 PM

Re: My first WFO build...
 
And continued (last one, I promise!)

Filled the remainder of the base with a mixture of 3 parts sand to 1 part fire clay and set the firebricks in that slab to make my floor:

http://i1121.photobucket.com/albums/...n/IMG_2846.jpg

http://i1121.photobucket.com/albums/...n/IMG_2847.jpg

http://i1121.photobucket.com/albums/...n/IMG_2850.jpg




That's all I have so far. The bricks are set in place really well, but I just want to let the slab dry out a bit more before continuing. Next up is my brick arch and then building the dome. Getting close now! Thanks for looking!

Les 11-30-2012 03:45 PM

Re: My first WFO build...
 
Wow - interesting approach. Not sure what the bottles are going to buy you since solid glass is a poor insulator. Also, I believe it's recommended that the hearth brick can float. This will be fun to watch...

shuboyje 11-30-2012 04:22 PM

Re: My first WFO build...
 
If you are going to go to the effort of building up a brick dome I would HIGHLY recommend pulling up the floor and putting in better insulating layer. It looks like the hearth is pretty low right now anyway, so it would kill two birds with one stone. Insulation like you have are common in third world countries, and cob ovens muddled together from scrap, but if you are going to the effort to build an a brick dome, and you've already built a very permanent base, you want real insulation.

Sometimes posts like this aren't popular, they can come across as opinionated, snobbish, or even elitist. That's certainly not the motivation. Helping someone have an oven they are gonna love is the motivation.

Mooveebuff 11-30-2012 05:08 PM

Re: My first WFO build...
 
You're right, glass is a poor insulator. Air, however, is a great insulator. The purpose of the bottles is to create air pockets between the oven floor and the base. This is a techniques used to build cob ovens for years.

The base is just about waist-high. I don't want to go any higher, or it will make it too difficult for me to build the dome. I'm not building a brick dome...I'm making the dome out of clay. This will be more representative of "cob ovens muddled together from scrap".

The upside of doing it this way is that if I end up not being happy with it, the dome, floor, etc. will come apart easily enough and I can add on to the base and try again. This is my first go-round, so it's more of an experiment at this point. I learn better with hands-on, so I figured this would be a good way to go. Plus I didn't want to go to all the expense of that many bricks. This has been pretty inexpensive, just a lot of work.

Thanks for the input. I didn't take your post as being snobbish, and I appreciate your opinion. If I end up doing another one down the road or modifying this one, I may go the brick dome route.

Mooveebuff 12-14-2012 09:30 AM

Re: My first WFO build...
 
Well, I was going to go with a nice round brick arch, but discovered quickly that with my lack of knowledge and any real skill, I was going to have a problem getting it done....and I was worried about it holding up over time. Instead I went with this...stacked brick on either side, with steel bars running across the top with bricks set on top of those:
http://i1121.photobucket.com/albums/...n/IMG_2868.jpg

http://i1121.photobucket.com/albums/...n/IMG_2870.jpg


Beginning of sand form:
http://i1121.photobucket.com/albums/...n/IMG_2874.jpg

Sand form done....this took a LOT longer than I expected. Almost everything so far has!
http://i1121.photobucket.com/albums/...n/IMG_2878.jpg

Mooveebuff 12-14-2012 09:31 AM

Re: My first WFO build...
 
http://i1121.photobucket.com/albums/...n/IMG_2879.jpg

http://i1121.photobucket.com/albums/...n/IMG_2880.jpg

Covering with wet newspaper:
http://i1121.photobucket.com/albums/...n/IMG_2882.jpg

http://i1121.photobucket.com/albums/...n/IMG_2883.jpg


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