[Greenbuilding] [BULK] re: Condensation on Windows

[Lawrence Lile]

I've got some condensation too.  How much problem can this cause,
really?   What if you ignore it and let it evaporate during the day?  Do
people think it will ruin the wood in the windows?  What about a good
coat of exterior grade varnish on the bottom sash? 

Lawrence Lile, PE, LEED AP
Project Solutions Engineering

-----Original Message-----
From: greenbuilding-bounces at listserv.repp.org
[mailto:greenbuilding-bounces at listserv.repp.org] On Behalf Of Robert Tom
Sent: Monday, November 26, 2007 11:54 AM
To: GB REPP
Subject: [BULK] [Greenbuilding] re: Condensation on Windows
Importance: Low

On Mon, 26 Nov 2007 11:38:44 -0500, Mike Forbes
<biodieselmike at gmail.com>  
wrote:

> are any tricks to reduce/eliminate this other than my method with a
> cloth diaper every morning.  We lower our shades at night for
> additional insulation and consequently there is moisture near the
> bottom and corners of the windows in the morning.

Mike;

So long as you keep the interior rel. humidity levels at 40% and
continue  
to use night  insulation (ie lowering the surface temperature of the  
glass) I think that condensation will be a given.

And other than wiping it, I think that condensation gutters are about
the  
only other (non-gizmological, non-blasting heated air at the glass)
means  
of dealing with it.

The gutters would be essentially the same profile as the J-trim that is

used for drywall or hung ceilings but with a longer leg on one side so  
that it can shield the horizontal surface of the bottom sash piece and  
accommodate a down-fold so that the gutter portion will hold condensate.


=== * ===
Rob Tom
Kanata, Ontario, Canada
< A r c h i L o g i c  at chaffY a h o o  dot  c a >
manually winnow the chaff from my edress in your reply


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