Casa 90 corner build (and outdoor kitchen) begins....

[RandyJ]

Looking great. You should be very well insulated. Yes the blanket is some nasty stuff. I wore a respirator and a long sleeve shirt, and was still itchy after I was done. You are getting close to being able to cook something. Keep up the good work.

Randy

[terdferguson]

Made some more progress!



My flue pipe anchor plate didn't fit in the opening at the top of my casa oven. The hole was too small. That was irritating. I had to grind the hole to make it bigger which was added unnecessary work. Oh well. Eventually I got the anchor plate in there. Mortared it down and filled the 3 seams in the oven with mortar too.

Then it was on to the insulation. That is some nasty stuff. Reminds me of fiberglass with the fibers getting in your skin. I quickly learned to put on gloves and of course I wore a mask while cutting it. I put 4 layers over the oven. Should be nice and insulated!

[terdferguson]

I used some plastic sheeting/visqueen type stuff from home depot. I put it between my layer of pavers and the insulation board.

[joeykramer]

what did you use as a vapor barrier? did you use it between the floating slab and your ceramic fiber board?

[terdferguson]

For future reference for someone else, I decided to use the duravent flat roof flashing (6DT-FF) in conjunction with the storm collar . The flat roof flashing can be seen here:
http://www.ventingpipe.com/duravent-...shing/p2476119

If I used the storm collar alone I would have two points of water entry to seal (where the storm collar meets the granite and where it meets the pipe). By using the flashing piece, I reduce that to 1 (where the storm collar meets the pipe) as the collar slides onto and overlaps the cone part of the flashing piece.

Edit: I realize that there is still a water entry point where the flashing lays on the granite but it's a big flat piece of metal on a flat piece of granite. Should be very easy to permanently seal that with silicone.

[admin]

I think I answered my question. I can buy the duratech storm collar seen here:

http://www.ventingpipe.com/duravent-5dt-sc-5-inner-diameter-duratech-class-a-chimney-pipe-double-wall-storm-collar/p2475894

Then seal it with high temp silicone.

On another note, the lady at duravent insisted that I keep my granite 2" away from the double wall pipe. That seemed a bit silly to me since it's obviously a non flammable material. What do you guys thing?

The reason they recommend that is fire code regarding heat transfer. If it is too close, heat can build up and transfer, they want it to dissipate.

Tim
Forno Bravo

[terdferguson]

I think I answered my question. I can buy the duratech storm collar seen here:

http://www.ventingpipe.com/duravent-5dt-sc-5-inner-diameter-duratech-class-a-chimney-pipe-double-wall-storm-collar/p2475894

Then seal it with high temp silicone.

On another note, the lady at duravent insisted that I keep my granite 2" away from the double wall pipe. That seemed a bit silly to me since it's obviously a non flammable material. What do you guys thing?

[terdferguson]

So now I have a question. I'm placing an order for all my duratech parts....pipe, different pieces for going into the ceiling and out of the roof, spark arrestor etc. How do I handle the place where the pipe exists my enclosure. If you look at this picture you will see that I'd like to have the pipe come up through a piece of granite or marble that rests on top of my enclosure.



How do I make that spot watertight?

[terdferguson]

I placed my cooking floor on a thin bed of sand. Nice and level thank you very much.



Then it was time to place the dome. That front piece of dome is heavy. My neighbor and I could lift it just fine, but getting it up high enough to place around the floor stones was a real bear. We got it done in the end and our backs are intact.

[terdferguson]

Thanks Utah.

This past weekend a got a fair amount done. I removed most of the forms!



I put down my pavers and my vapor barrier.




Then it happened. I did something dumb. Real dumb. When it was time to cut my fb board I got out a sharpie and traced right around the oven floor stones. But terdferguson what about the dome? Um....yeah. So I didn't cut it wide enough to allow for the dome. And to make matters worse, I'm using two layers of board and I did it to both layers. So I spent an entire day fabricating pieces to fit exactly snug up to the outside of my already cut boards. It took forever. When I was done, I stuffed the gaps with little pieces of shaved board for good measure. Probably overkill, but whatever. I could have ordered new boards but I need to move forward and I think the end result is just fine. Take a look:

[UtahBeehiver]

Latex fortified mortar with nylon mesh tape I believe is the standard joint method for durock.

[terdferguson]

When I put up the durock for my enclosure, how do I seal the seams to make it waterproof?

[RandyJ]

Just a note. I did not put a vapor barrier in my build. I did not think about it till it was to late, and I was not going to tear it apart to put one in. And so far I have seen no problem.

Randy

[UtahBeehiver]

David is right about the "maiden voyage", I have made many accidental calzones full of coals and ash, LOL. The vapor barrier is just that, since you are following Randy J process of placing pavers on your hearth, this raises the CF board about where water could or may migrate from the hearth slab from the outside. The whole point of the exercise is to keep the CF from getting wet. So up to you, I think even David S or one of the long time members drilled a weep hole in the slab to give any errant moisture a place to go. Good luck

[RandyJ]

As to the maiden voyage if you have been cooking on a pizza stone for a while then you might be ok. If not then there is a leaning curve to proper oven management and useage. Try a few on you later curing fires and go from there.

Randy