what happens on the exterior of fieldstone foundations and bricks below grade

And some want to install interior systems. ](*,)

The Dirty Jobs/Duh Who

Very interesting .
Will Decker has spoken about the old lime based vs the new hard Portland cement.

Inspection Saturday had a brick foundation with lime and sand mix mortar.

The wood sill plate was not fastened, or bolted, to the wall of course when this house was built. They just set the sill plate on top of wet mortar.

Anyway 1/2-5/8 inch of mortar was deteriorated bad around the perimeter of foundation, nothing but moist sand/powder.