On 30 Jan 2006 20:47:51 -0800, "RicodJour"
wrote:

Paul Franklin wrote:

2 inches of foam has higher r value than 6 inches of fiberglass.

2 inches of polyisocyanurate has approximately the same R-value as 3.5"
of fiberglass. Most people would use the cheaper blue or pink foam
board, which would require 4" of foam to equal the 6" of fiberglass.

R

Oops, of course you're right! Brain cramp!