Does anybody have a recommendation on where to get equipment to do foam insulation? Polyisocyanurate would probably be best, but I'm open to other foams. I would use it to retrofit older houses that currently just have nothing but cavities in the exterior walls. Ideally, I'd like a setup sized for a small contractor.
I'm in Kansas City, and it would be nice to have a supplier here, but I expect the company would be outside of this area.