Randy's dreams do come true oven build

[mrchipster]

Re: Randy's dreams do come true oven build

Gulf good catch, I have not been keeping a close eye on this thread.

Randy, what Gulf is trying. To say is that the inner arch bricks, as you have cut them are all uniform. I am sorry I did not discuss this with you earlier.

But, as the dome goes up the diameter of the interior of the oven gets smaller. Therefore the inner arch needs to reach in to match that smaller diameter. The shape of the bricks making up the inner arch will become longer and the exposed lower surface inside the dome becomes smaller and the surface receiving the dome brick becomes larger. The shape of this surface is easy to describe with a piece of string or your IT can be used to help describe it.

[Gulf]

Re: Randy's dreams do come true oven build

Randy,

The point where the dome brick meet the inner arch will step in with each course following the curve of the dome. The cut of the inner arch would follow that same curve. That would meen that the inner arch brick should protrude further toward the center of the dome as the heighth of the arch increases for those two planes to match. You can check that with your IT.

I just confused myself. Maybe, someone will step in with pics.

Sorry to set off the alarms

EDIT:
I did a quick search. Here is a pic from Deejayoh's build. It sort of shows what I am referring to.

[RandyJ]

Re: Randy's dreams do come true oven build

Hi gulf I may have missed something. What do you mean by tear drop shaped entry transition? And if that is what I have set myself up for then yes I guess that is what I will have. I may have missed something along the way. I did what seamed right. I realize it might not be quite what everyone else has done but it looks to me like it will work and be serviceable . Please correct me if I am wrong and need to change something. Thanks for all the help

[Gulf]

Re: Randy's dreams do come true oven build

Randy,
Are you going for a "teardrop" shape for the transition from the dome to inner arch?

[RandyJ]

Re: Randy's dreams do come true oven build

Gastagg thanks for the complements. I can not take credit for the IT I just copyed someone else here on the site. As for oven opening it is 12.5" tall by 19.25" wide.

I got a few hours of work in last night again. I got my first 2 courses of bricks in and got it tied in to the arch. It seamstress take longer and more mortar than I was thinking that it would. Now I need to start cutting for the next course.

Randy

[gastagg]

Re: Randy's dreams do come true oven build

Like your indispensible tool too!

[gastagg]

Re: Randy's dreams do come true oven build

Randy, that looks great! What are the dimensions of your opening? I was wondering what those yellow things were!

[RandyJ]

Re: Randy's dreams do come true oven build

Well I finally got to do a little more work on my oven. I have got about half my 2nd corse done and I got my arch for the oven entry finished. I know people have used a lot of different things as spacers, but I think I may have a first. I used wire nuts as my spacers. The yellow ones were the right height for the arch and some red ones I have are the right thickness for my dome bricks. You know what they say. Use what you know.

Randy

[david s]

Re: Randy's dreams do come true oven build

I think it will be to coarse and firm for a piping bag.

I have seen it done both ways wait or all at once at the end. I would lean towards backfill as you go but maybe the day after setting the bricks so you do not dislodge freshly set bricks.

I think if you are using shims to hold the bricks at an angle, having them sticking out like a porcupine during the whole build would be a pain.

Some people use the thin slivers from their brick cutting to do part of the back filling. And then leave them in place forever.
Just my 2 cents.

Using some wooden wedges works quite well. When you've laid half a dozen bricks remove them to reuse as you go.That way you only need about six wedges.

[RandyJ]

Re: Randy's dreams do come true oven build

I got a few hours of work done again today and I got my first corse all mortared in place. It took a few bricks to get the hang of it but once I figured it out it went pretty good. I am glad I got it all done as it is going to rain for a few days now. I got it all tarped up so it will not get wet. Now to see how it looks when I can open it up this weekend.

Randy

[Novaslo]

Re: Randy's dreams do come true oven build

For me I used a piping bag with a bit of wetter mix.
I tried both methods and ultimately ended up mixing in the piping bag and shaking it to mix and piping like a mad man.

it worked really well.
Messy though.

I was also using the forno bravo mortar mix which was much easier to work with than my home brew.

Really fine sand.

[mrchipster]

Re: Randy's dreams do come true oven build

Ok good to know. I do also have a bag of mason's sand that I corse'er I will use that for back filling. For that did you use piping bags or trowels? And do most wait till the dome is done to back fill or fill as you go. Thanks for the help.

Randy

I think it will be to coarse and firm for a piping bag.

I have seen it done both ways wait or all at once at the end. I would lean towards backfill as you go but maybe the day after setting the bricks so you do not dislodge freshly set bricks.

I think if you are using shims to hold the bricks at an angle, having them sticking out like a porcupine during the whole build would be a pain.

Some people use the thin slivers from their brick cutting to do part of the back filling. And then leave them in place forever.
Just my 2 cents.

[RandyJ]

Re: Randy's dreams do come true oven build

Ok good to know. I do also have a bag of mason's sand that I corse'er I will use that for back filling. For that did you use piping bags or trowels? And do most wait till the dome is done to back fill or fill as you go. Thanks for the help.

Randy

[mrchipster]

Re: Randy's dreams do come true oven build

If you are back filling your bricks (using shims) and not using top tapered bricks, you need a coarser sand for the back fill.

[RandyJ]

Re: Randy's dreams do come true oven build

Thanks for the tips Chip. I will do the best I can to keep it cold. I wish I could have done some work on that this morning. I was afraid I was going to get frost bite. I was so cold till noon. I also took your advice on the sand and got the finest I could find. It is like sugar. Thanks for the help.

Randy