yourname wrote:
just a note, I had a company come in a spray over 1000 sq ft of floor
with a spray urethane product and i have to say I am greatly
dissappointed. The strength of the product is supposed to be the tight
seal and complete insulation vs fiberglas. Well, it would be good if
the installers understood this. Spraying up into a floor is no doubt
difficult, but they just did not understand the concepts. I had to
show them spots were I could still see the floor from underneath.
Umm, that would be R zero. I am going around with many cans of spray
foam filling in all the gaps, holes and voids at a rate of around one
can per 60 square feet. That only includes the spots I can see, voids
in the middle are invisible.

Seems like your subject line should be 'Spray Foam Insulation Contractor:
dissappointed'.