[Greenbuilding] moveable insulation

[nick pine]

"Doug Kalmer" writes:

>My homemade shades actually do seal well at the sides, but not at the top 
>and bottom, so there is a considerable amount of condensation on cold 
>nights. This does show that the moveable insulation is doing it's job...

Sounds like Powdermilk Biscuits, in the bag with the brown stains that 
indicate freshness :-)

If the windowsills rot in 3 vs 5 years, are the shutters doing a better job?

Nick