Cheap insulation. Is there such a thing?

RustyRatRod said

Cliff, I think if I did that, I would do the inside, since the outside is white.

Click to expand...

It can be used inside and out.

[ame="http://www.youtube.com/watch?v=fURK1n00WEk"]Safe Room Walls Made Possible by Polyurethane Spray Lining - YouTube[/ame]