Share 'Upgrading insulation in a home with batts in the wall'

Hi out there. I have been running into customers that want to upgrade their wall insulation, but have batts in the walls. In checking with local insulation companies, one says he has foam injection system that works but is $2.00 a sq. ft., the other says there is nouthing he knows of that works. Let me know whats going on out there, so I can pass good information on to my customers. Have a Great…