Cob: Stone foundation, distance from trees

[Kerry S Tebbetts]

First of all, I just want to say "thanks" for all the great advice and
info.  This is great.

I'm also wondering how far from the surrounding trees should I build my
stone foundation.  These are pretty big oaks mainly.  I had read
somewhere that you have to be careful of tree roots invading your
foundation.

Thanks,
shae