are these Styrofoam?  That's a good question, I bought a 4 by 8 sheet last 
year from home depot and it was hard to make a  clean cut.  I used a little 
saw, but as I said it didn't come out clean.  How much did these pre-cut 
packages cost?  I believe the 4 by 8 sheet cost me between 6 and 7 bucks. 
I'd also like to insulate my garage door as I spend allot of time in the 
garage. 

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