RE: GBlist: glass block

[Koffringa@ase.org]

The insulating value of a double paned window depends on the glass
used...with or without low-e and/or solar heat gain coatings, etc.

http://www.efficientwindows.org/glazing_2lowemod.html

It also depends on the framing material used.

http://www.efficientwindows.org/frames_vinyl.html


Kate Offringa
Program Manager
Efficient Windows Collaborative
Alliance to Save Energy


-----Original Message-----
From: Kerry Wilson [mailto:kerrywil@yahoo.com]
Sent: Wednesday, January 31, 2001 3:46 PM
To: greenbuilding@crest.org
Subject: Re: GBlist: glass block


The remodel plan is to put a glass block wall 5 feet long and 3 high in
the shower on the North side.  I belive it will be a cold shower.  I am
having a hard time convincing my wife and the builder that another
alternative should be review.  I agree it will bring a lot of light in
to the room but at what cost.  

What is the "value" of a regular double pain window?

  
--- Sarah Holland/David Foley <hollandfoley@acadia.net> wrote:
> on 1/30/2001 7:52 PM, LISAPAUL@aol.com at LISAPAUL@aol.com wrote:
> 
> Serendipity. I just happened to have Pittsburgh Cornings' Glass Block
> specs
> on my desk. They state an R value of 1.96-2.06 for their hollow
> blocks and a
> 1.15 for their solid glass block.
> 
> Paul Brown 
> Compass Construction
> Grand Rapids, MI 
> 
> The actual R-value of a glass block assembly will differ from the
> R-value of
> an individual block - typically the R-value will be less at the edge
> of the
> block than in the center, and the mortar used to bond the blocks will
> have a
> lower R-value.
> 
> Perhaps ASHRAE fundamentals lists this.  You could also try
> contacting the
> Building Energy Research Department at Lawrence Berkeley Laboratory.
> 
> - David Foley
> -- 
> Holland & Foley Building Design
> 232 Beech Hill Rd.
> Northport, ME 04849 USA
> p: 207-338-9869 f: 207-338-9859 e: hollandfoley@acadia.net
> 
> 


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