Building a Cob Oven–Part VI

The sunny spell continues – but it’s highly unusual for mid-september so we had better get our oven done quickly before the rains set in. Today we achieved a big milestone by completing the basic structure: we finished the insulation layer and outer cob shell. All that remains now is plastering and some repairs to the inner surface.

IMG_4401It’s quite an impressive structure – larger than most backyard cob ovens we’ve seen. But it’s about the smallest you can make it if you want to do any real baking. 4” of thermal mass and 4” of insulation are just adequate; and the baking chamber isn’t huge either.

Sunday Update

Today we started applying finish plaster. The base is Klamath Yellow clay mixed with sand at about 1:3 ratio. We also added a good measure of boiled flour paste: it makes the plaster adhere better to the surface and harden up nicely when dry. After putting on the first coat it already looks much more finished.

IMG_4425IMG_4419IMG_4418IMG_4427

Advertisements
This entry was posted in Alternative Building, Food and Cooking, House. Bookmark the permalink.

One Response to Building a Cob Oven–Part VI

  1. Carl Wenz says:

    Great job! & I’m using brick to fill out the walls

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s