Exterior spray foam

Mr. Gocze.
Years ago a well known carpet company in Bangor sprayed insulation on
the exterior walls of their brick building. Would it make sense to
spray foam on the exterior walls of the basement between the ground
and the bottom of the cedar shakes? It would be about two inches
thick if it were sprayed to be even with the shakes. It could then be
painted any color to complement the house.
Applying insulation to the interior of the basement walls seems to me
to be problematic, covering wires, electrical outlets, pipes etc;
even though it may be an effective way to insulate.
Thank you for your advise.
Dan in Bangor

Hi Dan,
That was the Salibas Carpet building down by the waterfront in Bangor. It
worked well.
There are issues, though. The foam needs to be protected from weather and
is susceptible
to physical damage.
When you insulate on the exterior of a basement wall, there are these
issues plus it creates a pathway for insects to come up into the wooden
part of the building.
Given the issues on the exterior, I prefer to use it on the interior.
Tom