T h e L a s t W o r d  
We Asked, You Answered  
What is the most important attribute of glass, and why?  
lass enhances the inherent feeling of comfort and well-being  
in a space. Beyond providing internal visual connections, the  
connection to the outdoors enhances orientation and provides  
an atmosphere unmatched by other materials. Views of urban settings  
can invigorate building patrons, and nature views offer a sense of calm.  
Advancements in glass building envelopes make it an energy-efficient and  
practical solution, but it’s the feeling that glass elicits that makes it an ideal  
choice for designers in many applications.  
David W. Larson, TMP Architecture Inc.  
hile the most important attribute of glass varies by climate, orientation  
and program, one of my favorites is visible light transmittance (VLT),  
which identifies the percentage of visible light that passes through the  
glass. A carefully selected VLT value facilitates access to daylight and views  
while minimizing the glare that causes one’s co-workers to lower the blinds on  
a gorgeous midwinter afternoon. With our alertness, digestion and sleep cycles  
all relying on the circadian rhythms regulated by this exposure to daylight,  
choosing glass with a VLT that keeps the blinds up makes us happier, health-  
ier and more productive.  
Becky Alexander, LHB Inc.  
lass is, to me, the most mysterious of building materials. Glass inhabits a middle ground  
at the interface between solid and void. So many options are available now with new  
laminating techniques, insulation and fire-rated options. I truly believe that glass, as an  
aspect of building design, has limitless potential for innovation. When I lived in Paris, I would  
often walk by Charreau’s Maison de Verre and ponder the unremarkable façade. This house was  
fascinating to me, I realized later, simply because of its bold concept: a house in glass.  
Nikolai Katz, Nikolai Katz Architect AGG  
Architects’ Guide to Glass & Metal