Hi,

I have a 2 foot overhang on my house that I'm looking to insulate. The
overhang is about 12 feet wide and is on 2 x 12 joists spaced at 16 inch
centers. It has been stucco'd over the bottom, so I can't easily insulate
from the outside. There is an opening on each joist cavity in the basement
with about a 6 to 8 inch gap and I was looking at using some sort of
expanding spray foam.

My question is, are there any diy kits out there that will allow me to get a
nozzle into the cavity and fill with foam? Doing this much space won't be
cheap, so I would need a bulk kit of some sort.

I've googled a bit and only come up with companies that do the job for you.
I'm more than capable of doing the job myself.