Thread: Surviving high heating oil prices
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GregS[_3_] GregS[_3_] is offline
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Default Surviving high heating oil prices
In article , (Nick Pine) wrote:
GregS wrote:

I looked very closely at the foam sheeting at the home building center.
The R value is definately added with the foil backed foams.

What would lead you to believe that? The FTC says that's illegal.o

Polyisocyanurate often has foil, unlike Styrofoam, but its bulk R-value is
higher and the foil helps the foam avoid outgassing which lowers the R-value.

Nick

You could be right. I was assuming all the foams have similar R value.
I think I was also looking at the ratings of say, 1 inch compared to two inches.
If the reflective value is there, two inches will not be twice the R of 1 inch.

greg
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