ORNL Whole Wall R-value Calculator
 

Here's a detailed wall R-value calculator.

Can be very useful if you are contemplating building or re-insulating.

You can very easily compare various strategies.

Your tax dollars at work...

-AC_Hacker

Thanks AC_Hacker,

The Advanced Wall Systems section of the Oak Ridge National Lab website has a lot of interesting info on building materials and wall systems. This definitely goes in my bookmark list.

Tim