Sunday, August 21, 2011
Pizza Oven--Insulating with cob/adobe
Since far and away the most interest my art blog generates is for my home-made, adobe bread and pizza oven I thought I should reward all those random readers with an oven update.
As I said previously in my last Pizza Post, it is functional as it is now but would stay hot longer if it was better insulated. For a cob/adobe oven; insulation means: dirt/sand/clay mix but made into a slip by adding more water and then folding in hay or grass or sawdust. I had a big bag of woodshavings and sawdust from a neighbor's woodshop so that's what I used but I added some dried cut stemmy grass to give it a little more structural stablity.
Here is the process;
First I made some moist clay/soil mix and patched the few cracks that exist in the insulation layer I had built previously.
Then, I mixed up a wheelbarrow's worth of woodshavings/sawdust with clay/mud slip.
I mixed it with a shovel and then threw in a bucket of dried grass/stemmy clippings.
(Straw would have been better but I had a pile of cut grass).
Then I added about a two-inch layer, fistful at a time going around the base and then up the sides to meet a layer I had already added to the top. By slapping it on it didn't slump and the grassy bits helped meld the fistfuls together. I gently smoothed the surface and then added some scratches in the surface to help the next layer adhere/stick.
Now, I'll let it dry for a day or two and decide if I want to try to add a finish or smoother layer. It will take several days to dry out and I'll post again about how it works then.
But here is a photo of my last pizza: Potato and leek with garlic oil. It was tasty.