Google is your friend, Janosh...
a good explanation:
http://www.sprayfoam.com/spps/ahpg.cfm?spgid=6
"The advantages of closed-cell foam compared to open-cell foam include
its strength, higher R-value, and its greater resistance to the
leakage of air or water vapor. The disadvantage of the closed-cell
foam is that it is denser, requires more material, and therefore, is
more expensive."
Cheers,
Dave
--- In papercreters@yahoogroups.com, "Janoahsh" <janoahsh@...> wrote:
>
> Hi Dave,
>
> I�m not familiar with closed cell spray foam. This would be very
useful.
> Please explain.
>
> Janosh
>
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