allen lumley wrote:V.M. Remember to save 1 1/2'' - 2'' for your structural cob, the stuff with the straw, and your final waterproofing finish coat ! Big Al !
Do you mean in general, as I never showed these layers in the drawing? If so, I was just planning to have the outermost 1.5" of cob on all the surfaces to have chopped straw in them. This refers to the outline of the bench\cumbustion unit shown in the drawings.
Then, I was planing on adding 1\2" of earth plaster to it all when the rough cob is finished. Didn't show this on the drawing, but I expect it to "grow" 1\2" more all around once finished and lime-painted.
Also, I am planning on using "form boards" to build this thing. I want to use 1\4" plywood and templates to shape it all. Will this create any problems for the earthen finish plaster adhesion? I wonder if cob with a plywood formed surface could be to smooth for earth plaster to stick to. If so, will scratching the surface of the structural cob be enough to promote earth plaster adhesion? (One of those worries that won't leave my mind all day)