dmun's 36" geodesic oven part II

[dmun]

Now, to above the roof:



The winch was mounted on the roof sheething, screwed through to the structure underneath.



It was really high up, and perched on that curved decking was a challenge, especially when it got bits of sand and mortar from the masonry, which made it slippery. A hint: Kitty litter buckets aren't engineered for hoisting masonry. That handle died toot sweet.



One thing I did was to build a little work platform on the back side of the chimney, I was able to do the heavy work, like lowering flue tiles, from a level perch.



It did leave me working under grade for the first couple of courses.

[asudavew]

Just awesome.

What else can I say?

What are you going to do when you are done?

Do you have something else to look forward to?

[dmun]

Here I am, leaning down to stuff used fiberglass insulation into the block voids, to keep all my mortar from falling down the holes.



Laying out mortar. You notice that the short piece of the big flue tile was put in down here, to make the two stacks level and even. I wanted full pieces up where the weather exposure is the greatest. I've been looking at a lot of chimneys, and you'd be surprised how many are deteriorating at the top.



More mortaring,



and blocks. Note those woven gloves with rough rubber on the palms, I figured out to late that you didn't need to work concrete with bare hands until you bleed.

[dmun]

Here's another thing I figured out too late:



A jig for filling the spaces between the blocks from above. It's two pieces of "L"-shaped quarter-inch luan, screwed to a piece of two-by-four. Fill and tamp, the job's done.



I start with bricks, to flare out the chimney to it's final size above the flashing. Up to the roof peak.



Another layer of flue tiles in place.



Widening layers of brick. Notice the thin strips of plywood: They are space holders for the flashing, so I don't have to angle grind slots in a precarious place.

[dmun]

Finally!



Above the roofline, and done with blocks, I can use the Bricky again.



What a difference it makes in the quality of the work.



And speed. Higher,



and higher.

[dmun]

This is the flashing at the top of the flue tiles, just wrapped around and bolted, with four tabs to establish the top of the slab. This will let me cast a concrete chimney cap and allow for expansion of the flue tile stack.



Here are the last two flue tiles in place.

Almost every chimney, no matter how humble, has some sort of flourish at the top. I think it's a bit of relief that the mason is done with this arduous job.



This was designed to mirror, in a shallow way, the decorative corbels above the oven opening. Also, there are no exposed cuts to deteriorate in this high wear area.



Note how the bricks are tilted at a ten degree angle? This establishes the tilt of the bluestone sills used as edging at the top, tilted to repel standing water.

[dmun]

More bluestone edging.



The cavity is stuffed with scrap fiberglass insulation, and covered with flashing, to prepare for casting the concrete slug.



Tired? You bet.

[dmun]

I tried to embed a youtube video, but it didn't work. Let's try for a clickable link:

First fire video

See if that works, and if it doesn't, here's a picture or two:

[Les]

Very Cool (hot?) David, and you still have a home Fantastic accomplishment!!!

Les...

[maver]

Forno. Bravo!