Can I use these as insulation?

[Ramper]

http://rmn.craigslist.org/mat/2155111742.html

I have a pole barn that is drafting and the snow gets in.

 

[kb2tha]

Sure, but it is not insulation. I doubt that you will get any significant R value or improvement with them. Are those $5. each? I just bought some new 1" thick urethane rigid insulation with a stated R of 7. $10. per sheet 4 x 8. Craigslist. Sheet insulation appears pretty regularly at least in my area on CL. Ken

 

[Bondo]

Ayuh,... Real insulation is cheaper than that 1/4" sign board...
I doubt it has an insulation valve of even R-1...