[Cob] cob stoves & light straw

[Brad Calvert]

Two unrelated questions:

1.  Does the inside of a cob oven become fired, like pottery in a kiln?

2.  Does anyone know the typical density and R-value of dry light straw,
also how wide the panels can be compared to their depth.  Or can anyone
suggest where such data might be found? (light straw = straw soaked in a
clay soup, then packed densely to fill spaces, clay acts as fire retardant
and mould inhibitor).