[Cob] Tires For a Foundation?

[beno]

Amanda Peck wrote:

<snip>

> A foundation is for me the foundation for the very heavy WALLS.  And 
> here you really want to have a solid level surface for the wall to 
> stand on.   Becky Bee's diagram looks like it might be only five or 
> six inches over ground level.  That could be one tire high, if you 
> could just set them on flat level ground.  Most everybody else would 
> use at least three layers on level ground--one layer with the top 
> level with the ground, drains to daylight underneath or beside, two 
> more to raise the house a bit in case of flood or whatever.

Good idea. In that case regular passenger car tires ;)

<snip>

> On steps or retaining walls built of tires, it's easy enough to step 
> the tires back so that the outside edge of the upper tire is resting 
> on the dot that connects the circles, and the upper tire is sitting on 
> the original dirt or on gravel for drainage.  But I think it would be 
> really awkward working on a building when in order to add cob to the 
> wall, and plaster, and work on the roof you have to look down and see 
> exactly where you are stepping, and positioning ladders might be 
> really a pain.

Lime concrete to keep the stones in the higher tires in place?
Thanks,
beno