Dave's Pics of Progress

[Acoma]

Re: Dave's Pics of Progress

Dave, being that this looks like a dry run, you plan to cut the firebricks for the hearth to define the floor area? I did not see that.

[asudavew]

Re: Dave's Pics of Progress

I'm gonna mark the outside of the walls. And then build a form around the marks, so that I can just pour an insulating layer right under the oven only.

Then I will lay my floor on that, with the outside walls surrounding the floor.

I hope this helps.

[maver]

Re: Dave's Pics of Progress

I'm gonna mark the outside of the walls. And then build a form around the marks, so that I can just pour an insulating layer right under the oven only.

Your walls will sit on the insulating layer to thermally isolate the oven? Do you plan to reinforce the edges of the poured insulating layer or extend it slightly beyond the base of the wall to avoid pressure on the corners (it can be pretty crumbly stuff)?

[asudavew]

Re: Dave's Pics of Progress

Your walls will sit on the insulating layer to thermally isolate the oven?

Yes, I'm going to run the vermiculite to the outside of the dome walls.

Do you plan to reinforce the edges of the poured insulating layer or extend it slightly beyond the base of the wall to avoid pressure on the corners (it can be pretty crumbly stuff)?

I haven't got it all straight in my mind yet, but now you have me thinking.....

Maybe I can make it about an inch bigger all around the edges and put an inch or so of mortar around that.

What do you think?

[rlf5]

Re: Dave's Pics of Progress

Yes, I'm going to run the vermiculite to the outside of the dome walls.





I haven't got it all straight in my mind yet, but now you have me thinking.....

Maybe I can make it about an inch bigger all around the edges and put an inch or so of mortar around that.

What do you think?

Why the extra inch of mortar? Sounds like more work. Why not just extend the vermiculite out two inches?

[asudavew]

Re: Dave's Pics of Progress

Why the extra inch of mortar? Sounds like more work. Why not just extend the vermiculite out two inches?

As long as you think that will solve the problem, I'm all for it!

Thanks for the input!

I can use all the help I can get.

Now if I could just find some vermiculite or perlite around here...............somewhere.....................! !!!

[maver]

Re: Dave's Pics of Progress

I second the two inches idea - then you should be far enough from the edge that you are only dealing with compression, no shearing forces. Don't add an extra step of wrapping it with mortar - needless work.

[asudavew]

Re: Dave's Pics of Progress

I second the two inches idea - then you should be far enough from the edge that you are only dealing with compression, no shearing forces. Don't add an extra step of wrapping it with mortar - needless work.

Yep. I think that's the way I am headed.

I appreciate the input on this issue.
I'll let everyone know how this works out.

Luckily, I finally found a garden store in town that has ONE bag of course perlite.

No vermiculite to be had. I'm not sure if one is enough... for this part.. I know I will need more later, but the owner said he can get more when I need it.

[rlf5]

Re: Dave's Pics of Progress

Thats good. Perlite is a lot easier to handle anyway. I hate vermiculite.

[asudavew]

Re: Dave's Pics of Progress

Thats good. Perlite is a lot easier to handle anyway. I hate vermiculite.

Sweet.

That's nice to know!

I'm feeling better about this weekend!

[maver]

Re: Dave's Pics of Progress

Dave - when I was building my oven and looked up insulating values perlite is marginally better then vermiculite. One more nice to know item.

[asudavew]

Re: Dave's Pics of Progress

Well I built my forms for the oven base today.(Sunday)

And then mixed my insulating layer. I began adding the mix to the forms, and blew through one bag of perlite like it was nothing...........

Unfortunately, it was the only bag in town. So I ordered two more, but they won't be here until Friday....


I will post some pics of my form and some of the tile work I started today.

[Frances]

Re: Dave's Pics of Progress

Bummer!
...Glad to hear I'm not the only one these things happen to though:-)
I seem to spend half my time waiting for things to dry/cure/arrive.

[asudavew]

Re: Dave's Pics of Progress

Well here are some pictures of my insulating hearth form and partial perlcrete pour.

I also did a little tile work.

So I will post those pics too.


These first are building the forms, and leveling the top of the forms for a level cooking surface.

[asudavew]

Re: Dave's Pics of Progress

I redrew my floor circle. I didn't like the string method. It wasn't very accurate.

So here is what I used to redraw the floor.