Re: GBlist: glass block

[GrenSheltr@aol.com]

In a message dated 1/30/01 4:47:43 PM Eastern Standard Time, 
kerrywil@yahoo.com writes:

<< Does anyone have a source for the "R" value or rating for glass block
 used in an exterior wall.
 
 I have a contrator who is tells me they are just as energy efficent as
 double pain windo >>


since thermopane windows vary widely in terms of their R value, would be hard 
to say exactly --- plus glass block come in 2", 3" and 4" thicknesses

Weck's brochure lists their 3" block as having a R value of 1.89, 2" is 1.75, 
4" is 2.0
with light transmissions percentages depending on which design    Linda Lloyd
______________________________________________________________________
This greenbuilding dialogue is sponsored by CREST <www.crest.org>
BuildingGreen <www.buildinggreen.com> and Oikos <www.oikos.com>
For  instructions send  e-mail to  greenbuilding-request@crest.org.
______________________________________________________________________