Jake's In Mass (Started July 3, 2011)

[jatsrt]

Re: Jake's In Mass (Started July 3, 2011)

Getting there, I wanted to get the hearth done before this coming weekend, but probably not going to happen. I have a playground build happening so it will probably be a couple of weeks before I get to it. So far so good though.

[jatsrt]

Re: Jake's In Mass (Started July 3, 2011)

Gathering some supplies, thanks to my dad who has access to agricultural supplies.

[jatsrt]

Re: Jake's In Mass (Started July 3, 2011)

I used some 1/2 blocks for some extra hearth size and to offset the 3/8" lost by dry stacking blocks. Gave me a couple of extra inches from my base design overall without going a full 8-16".

[rlodad]

Re: Jake's In Mass (Started July 3, 2011)

Just get done what you can. It goes faster than you think. What's with the extra blocks in the corners? When you get done with the stand and hearth, the rest is more thinking, less heavy lifting. Looks good so far!

[jatsrt]

Re: Jake's In Mass (Started July 3, 2011)

Started on the base this weekend, didn't get much time to work on it(family visiting). Hope to have the base and hearth done and framed by the end of next weekend.

[rlodad]

Re: Jake's In Mass (Started July 3, 2011)

We're watchin'. Good luck, though it doesn't look like you'll need it! Glad to hear not much damage.

[jatsrt]

Re: Jake's In Mass (Started July 3, 2011)

Some minor paio furniture damage only when the weather came through.

Both of you guys have great looking ovens. So, you are completely correct on all the tolerances, very tight. I'll use it as an excuse to push myself.

When all is said and done, the slab will pretty much be completely hidden. Just enough to help hold up the outer masonry work.

Also, Instead of assuming 8" for studs and backer board, framing around the dome allows the insulation to come almost to the outer sheeting if needed. So there is much less "empty" space inside and you gain almost 7".

I had a design that I was going to igloo, and I had another 8" all sides for that, in the end I decided I wanted a hut instead.

[rlodad]

Re: Jake's In Mass (Started July 3, 2011)

Very close to Charlton. I assume you got through the Springfield tornados ok?

[rlodad]

Re: Jake's In Mass (Started July 3, 2011)

jatsrt,
I used blanket and perlcrete because I wanted an igloo style oven. I like the look. I also covered the perlcrete in 2 coats of fortified surface bonding cement. (Like stucco, but more waterproof). In the end the sides of the outside of the dome were flush with the 96" hearth width. Here it is:

http://www.fornobravo.com/forum/f8/42-pompeii-build-boca-16053.html

[jatsrt]

Re: Jake's In Mass (Started July 3, 2011)

Also, I'm in Westborough, near Worcester.

[rlodad]

Re: Jake's In Mass (Started July 3, 2011)

Agreed, but that's the hearth, not the slab. He said his slab width is 6 feet. That leaves 7/2" on either side of the slab, or 3.5". Not much, and if you use perlcrete instead of framing and board, it might be wider. (I don't think that 1" balnket overlapped in 3 layers is anything like 3". Mine is more like 4-5. I would have made the slab wider, and especially longer as per the FB plans.

[jatsrt]

Re: Jake's In Mass (Started July 3, 2011)

rlodad and cheesesteak

So, I pretty much doing the exact same type of install as cheesesteak. Rlodad, why did you do pelcrete and blanket? Either way even if I wanted to, with some creative framing you could get about 6" all around to the edges.

So my hearth is 6'5"x5'4". Just about the same as Cheesesteak. Good to see that he was able to fit the oven well.

I designed it in SketchUp with two or three different dimensions and this is the one that felt the best. I am going to have to very carefully watch the exact center location of my oven so that I have the correct tolerances. I also have backup plans to "adapt" if I need up to 4 more inches on each side.

Worse case, is after my soldier row, I decide to go a little smaller, but I think it will work out.

[Cheesesteak]

Re: Jake's In Mass (Started July 3, 2011)

Jake,
I may be missing something here (happens a lot). Is the size of your slab 6x6'8" or the size of your hearth? I built a 42" pompeii with 3" of blanket insulation and 3" of perlcrete, and it barely fit on my hearth which is about 7'2" wide. Are you using less insulation, or all blanket? I think it is going to be a tight fit on a 6' wide slab, even if the slab and hearth are the same width and length.

BTW, where are you in MA? I am in FL now, but have lived in Boston, Springfield, Charlton, Brookline and Albany, NY. You have to be close to one of those!

Good luck!

I'm almost done with my 42" oven and my hearth slab is 65" wide. Here's where I am:

WFO

42" cooking surface, 9" of oven (brick) wall thickness total, 6" thickness of insulating blanket (3 " each side), 8" total for the metal studs and concrete board for exterior walls (4" each side) = 65".

[rlodad]

Re: Jake's In Mass (Started July 3, 2011)

Jake,
I may be missing something here (happens a lot). Is the size of your slab 6x6'8" or the size of your hearth? I built a 42" pompeii with 3" of blanket insulation and 3" of perlcrete, and it barely fit on my hearth which is about 7'2" wide. Are you using less insulation, or all blanket? I think it is going to be a tight fit on a 6' wide slab, even if the slab and hearth are the same width and length.

BTW, where are you in MA? I am in FL now, but have lived in Boston, Springfield, Charlton, Brookline and Albany, NY. You have to be close to one of those!

Good luck!

[jatsrt]

Re: Jake's In Mass (Started July 3, 2011)

Here are some pictures from the before pour and after. I think we were a little too wet on the cement, but it went well and looks good. My brother Matt helped me and we used a mixer from Harbor Freight.