Pat's 42" WFO build begins...I think!

[UtahBeehiver]

Re: Pat's 42" WFO build begins...I think!

I see a wet saw in the foreground, why not taper the full brick rather than cut into 1/2s or 1/3s at least for a few more courses? Somewhere along the way, unless you bevel you will start to see the inverted V and you will have to make some decisions. I would use full bricks as long as possible - IMHO. I was able to get to course 7 which is about course 8/9 using (standard 2.5" brick) using full bricks, although tapered and beveled. Good luck with what ever works for you.

[irelande5]

Re: Pat's 42" WFO build begins...I think!

Hi Russell, not sure what you mean by taper full brick? I have been cutting bricks in half, then beveling to prevent inverted V when facing oven. I have not angled them up to this point, I did try this when I first started and just took too long and made lots of mistakes. Since I seen some just use grinders, I thought I would split the difference and get a wet saw, using just for bevels and filling in mortar for back areas, is this not ok to do?

I am a little concerned that without tapering and keeping the bricks tight agaisnt each other, I will lose thermal mass (using mortar to fill in back/and back part of sides.

[UtahBeehiver]

Re: Pat's 42" WFO build begins...I think!

Sorry, I meant full width. Here is a picture from JCG31's thread on that I meant to say. PS mortar is your friend too....

[irelande5]

Re: Pat's 42" WFO build begins...I think!

completed 5th course and have 6th cut ready to mortar in. heat stop is pretty amazing, been making it like a thick peanut butter and it has been holding the brick in place without forms or tool, hope this last a couple more courses. noticed drying off the bricks a little after the water soak helps them stay in contact better too.

made the form for the arches, asking a friend for some help on monday to get the arches going, hopefully we will have these complete next week.

[UtahBeehiver]

Re: Pat's 42" WFO build begins...I think!

Pat,

Not sure if this tip is late but I ran across it and thought it might help with the arch transition for for you. It is from MrChipster.

[irelande5]

Re: Pat's 42" WFO build begins...I think!

Thanks Mentor Russell!! I will take all the help I can get. Take care, Pat

[irelande5]

Re: Pat's 42" WFO build begins...I think!

Completed course 6 and 7, 8, starting 9 today. Still no forms yet, not sure how long this will last, been getting contact, holding it and then using string to determine pitch of brick, pressing down to get proper pitch, removing excess mortar and moving one to next. It goes pretty quick, but I am using a lot of mortar, thinking I will have at least 4 bags of heat stop gone, wow, thats a lot more than what my brick cost! See why people roll their own. After getting a center brick started, I work left and right in 2 brick sequence, been working out great so far.

Looking like my interior height will be closer to 20" instead of 21. Starting arches on Tuesday (delayed this week), hopefully have them complete by next Friday. If all goes well I should be complete with a functional oven by Sept 1, then start working on veneer.

[irelande5]

Re: Pat's 42" WFO build begins...I think!







Starting to get a slight overhang on some bricks as they sit on directly on top of the brick below, as the course circumference gets tighter. Also noted as the courses increase, and the bevel gets more pronounced, and the angle the brick is sitting up off the brick below (determined by string) the brick corners are touching but the center of the brick is not, slight gap as it is lifted to proper angle (forgive my lack of terms!).

I imagine these 2 issues are part of the process, but maybe some bevel the flat part of the brick as it lays on the brick below, making the center area slightly taller then corners?

Anyway, I am pretty happy with the way it has been going, I have fairly good brick to brick contact in the oven, got some bricks that I noticed were chipped after I put in, that drives me nuts.

Thanks for all the help folks!

[UtahBeehiver]

Re: Pat's 42" WFO build begins...I think!

Pat,

Had the same question on the overhang when I did my build. Tscar, said it is the way it is. So I just moved on. I guess if I was anal about it I could of taken a grinder to it but for the most part left the overhang as is. I am working with 5.25" wide bricks so the "chord" overhang length was more pronounced. My unsolicited opinion.

[irelande5]

Re: Pat's 42" WFO build begins...I think!

Good to know Russell, your opinions have gotten me to this point!! Thanks as always

[Amac]

Re: Pat's 42" WFO build begins...I think!

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Starting to get a slight overhang on some bricks as they sit on directly on top of the brick below, as the course circumference gets tighter. Also noted as the courses increase, and the bevel gets more pronounced, and the angle the brick is sitting up off the brick below (determined by string) the brick corners are touching but the center of the brick is not, slight gap as it is lifted to proper angle (forgive my lack of terms!).

I imagine these 2 issues are part of the process, but maybe some bevel the flat part of the brick as it lays on the brick below, making the center area slightly taller then corners?

Anyway, I am pretty happy with the way it has been going, I have fairly good brick to brick contact in the oven, got some bricks that I noticed were chipped after I put in, that drives me nuts.

Thanks for all the help folks!

Yeah it's normal Pat - and comes from trying to force rectangular bricks into a spherical shape. I think Gianni (Octoforno) towards the top rounded his bricks to get an almost perfect joint. Cutting the bricks smaller also reduces it.

On reflection that effect probably contributes to the "droop" most of us got when we joined the dome to the arch - and explains why the attaching brick needs to be tilted up a little at the arch end.

[irelande5]

Re: Pat's 42" WFO build begins...I think!

Thanks Amac and Russell, I will push forward and nit worry about it. Take care

[irelande5]

Re: Pat's 42" WFO build begins...I think!

Well I survived the arches, but not without being scathed a little. I read about and prepared for (by tilting up more, thanks Amac), but I most not have done it enough because now I have the droops! That bothers me, I will right on level all the way to the arches, but I think I know where I made my mistake. I worked up on the back side of the oven, continuing courses up as I delayed on arches, otherwise I would have caught this because I check with level after every course. Any word on how to best correct this, will this affect the stability of the oven? I have finished course 10, this is where I finally caught up after building up to arches.

Good new I have the duravent flange on and its real level, guess there is hope for me yet. Will post new pics tommorrow. Take care all!

[irelande5]

Re: Pat's 42" WFO build begins...I think!

Thanks Russell for the feedback on the droops, will try all your methods since I have 3 or less courses to go. Here are the latest pics, excuse the arch, its not the prettiest thing. I found the arch to be the most difficult part of the project yet, not sure why, but it really kicked my butt around.

[irelande5]

Re: Pat's 42" WFO build begins...I think!

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