[Greenbuilding] Diminishing returns [was: Double Stud walls]

[Corwyn]

On Jul 24, 2006, at 10:20, Jeannie wrote:

> I'd like to add that it does little good to super-insulate one area 
> (such as
> between the studs) if you ignore major heat loss areas like windows 
> and even
> the studs themselves which serve as thermal bridges.

I disagree.  Tests seem to indicate that thermal performance of wall 
systems pretty closely match the theoretical value obtained by 
averaging R-value over the area covered.  Thus, you can successfully 
estimate, and reduce,  heat loss for one area without worrying about 
other areas.

Of course, in order to get good overall performance you need as much 
insulation as you can get everywhere,  but just because you have single 
pane windows is no reason not put insulation in the walls.  Replacing 
the windows may be more economical of course (or not).

Thank You Kindly,

Corwyn

-- 
Corwyn
Kermit didn't know the half of it...
http://www.greenfret.com/
corwyn at greenfret.com