Foam Insulation 2.0

Can rigid foam insulation be installed in basements underneath or before strapping?

I saw on HGTV, Holmes on homes, they insulated the basement walls and floor. But I noticed that it hadn’t been strapped or studded yet. They glued the panels on and taped all corners and seams. It looked like a good way to seal the area. But how would you strap and drywall that? You cant just glue and screw the strapping to the 2” foam can you?

Glue insulation to the wall, tape/foam the seams. You can then stud the wall in front of the foam, or attach furring strips to the walls (through the foam) with a power actuated gun, then attach the drywall. Foam is a perfectly efficient way to insulate and air seal the basement walls.

Where can we find the ingredients/procedure to make spray foam insulation?

we are high school students who have decided to pattern our investigatory project after the soybean spray Foam Insulation. please help us. thanks.

http://www.powerhousetv.com/stellent2/groups/public/documents/pub/phtv_se_in_bu_000575.hcsp

http://www.biobased.net/

http://www.hgtvpro.com/hpro/bp_insulation/article/0,2617,HPRO_20150_3457625,00.html

attic insulation knob and tube wiring- foam board?

Is it dangerous to add Foam Board Insulation by knob and tube wiring? How far away would it have to be not to pose a hazard? Or is it possible(and safe) to add some sort of flooring over the wiring and then add insulation? Any info would be great!
I am in the US, a lot of us have it here who live in older houses. We live in a 1920’s victorian.

put fiberglass over it then the foam
knob and tube wiring isn’t,t the best but that is the way it was done then [20,s]