[Greenbuilding] Humidity between multiple windows

nick pine nick at early.com
Mon May 9 15:09:49 PDT 2011

Bob Klahn <Home-NRG at dnaco.net> wrote:

>The old rule of thumb for minimizing / avoiding condensation between 
>windows (e.g. between prime and storm windows) has been to be sure that
the innermost window was five times tighter than the outer.

How would you measure that?

I might be sure the inner window is as airtight as possible and drill one 
1/8" weephole in the bottom of the storm window frame, and drill another if 
there's any condensation during the first winter, and so on.


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