For a 27 oven you ll need a foundation much larger than that however.
Cob oven roof.
Factor in another 8 for the cob dome itself 4 thickness around the entire sand form 16 for insulation 3 for plaster and another 4 for the diameter you may lose as your foundation grows taller and tapers inward.
The area containing the cob oven and seat isn t protected from the rain.
1 pallet of rocks or urbanite go select attractive rocks that match your design aesthetic concrete for footer ask person at home improvement store to get you enough concrete rebar for a 62 x 62 slab.
Once the hearth or base has been developed a builder may begin to construct the wood fired pizza oven dome.
Does my cob oven need a roof.
Building the living roof.
But that s not the half of it.
Posted 7 years ago.
We have access to good lime sand renders for sealing is this sufficient to avoid moldy walls.
The dome is constructed over an oven hearth which is created from cob stone slabs brick or fire bricks.
If you want to build a close replica of our cob oven here are the materials you ll need.
For a first time builder a yurt style roof like cyric30 suggested would probably be easiest.
Once the perimeter of the roof was covered with sod we covered the rest of the roof.
That s about a 58 diameter foundation.
Take a look at this wonderful cob oven with cob seating area frenk and nicole built.
In building an oven dome we need to have a thermal mass layer and a thermal insulation layer to hold good heat for baking.
Whereas the second layer thermal insulation of cob mixture consists of clay sand straw and water.
Some folks will add a true insulation layer between the inside and outside layers using a variety of materials such as sawdust perlite and vermiculite.
About 40 of rain yearly much in the form of snow which is on the ground november april.
The best solution to protecting cob buildings from heavy rain is a good roof with a wide overhang combined with a high foundation to protect the bottom of the wall.
Cob ovens use clay mixed with sand for the thermal mass and clay mixed with sand and a large amount of straw as an insulating layer on the outside.
Doing the edge was the trickiest part since i had the fold the epdm underneath itself and leave a little bit exposed to protect the edge logs.
So the first layer thermal mass of cob mixture consists only of clay sand and water.
I m in nh usa.
They showed me around their fabulous cob creations not to mention plying me with vinho frisante and humous.
A cob pizza oven dome is a basic structure built out of a combination of mud sand water and straw.
