GREETINGS!  Does anyone know of a study that demonstrates dangers (or not) of off-gassing of closed-cell spray polyurethane foam insulation after it's been installed for awhile?  Or, is it completely safe and inert once it's been installed as the manufacturer claims? I am building a new house with 1,150 square feet of basement (it's not a "daylight"), and I'm wondering if dangerous off-gassing will occur if I use ccPSF as insulation on the walls of the basement?