69FBCuda,thanks for letting me know about Lowes.
JDMopar,no venting for now,I would open them up like I did the house,window screen the whole soffit.Probably use a temperature control exhaust fan thru roof or one of the ends.
4spd340Swinger,thanks for that idea also.
Scamp Rohnda,I'd probably still cover the walls to protect the foam...but maybe use it for the ceiling?
RustyRatRod,spray foam insulation?
