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Half inch think insulating glazing unit

Ramana Koti

Sustainable Design Leader

HKS, Inc.

LEEDuser Basic Member

11 thumbs up

June 26, 2019

Dear all,

For a specific existing building application, we are looking for a half inch insulating glazing unit, preferably with low-e coating. Based on my research, 5/8" seems to be doable (1/8" glass + 3/8" air gap + 1/8" glass) but I'm yet to find a viable 1/2" solution. Have you come across any on your projects? Thanks for your attention.

Ramana Koti

Lord Aeck Sargent, A Katerra Company.

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James Roseberry

Director of Sustainability, Senior Project Manager, Associate

Trivers

LEEDuser Premium Member

0 thumbs up

Wed, 06/26/2019 - 16:56

Ramana – Perhaps not directly answering your question, but we recently had a project using Pilkington Spacia as a monolithic (+/- ¼”) glazing on a historic renovation project. http://www.pilkington.com/en/global/products/product-categories/thermal-insulation/pilkington-spacia Thanks, James James Roseberry. AIA, CDT, LEED AP BD+C Project Manager | Associate [cid:image004.png@01D4C2CF.934CCDD0] 314.446.5055 d 314.724.3968 m www.trivers.com From

Marisa Allen

Architect | Sustainability Team Manager

Quinn Evans Architects

LEEDuser Basic Member

0 thumbs up

Wed, 06/26/2019 - 18:33

Ramana, our Director of Building Envelope Performance shared this recently from Vitro architectural glass. It shows U values for a variety of gap widths and gas types. Maybe they could help. http://www.vitroglazings.com/VitroGlazings/media/sitedocuments/TDs/75_TD121F.pdf

Anne Hicks Harney

Founder and Principal

Long Green Specs

LEEDuser Basic Member

0 thumbs up

Wed, 06/26/2019 - 19:43

Just go here and configure to your hearts content: http://construct.vitroglazings.com/ When you get to coatings, choose Solarban, then Solarban 90 to get a climate zone 3 compliant SHGC.

Stet Sanborn

SmithGroup

LEEDuser Premium Member

0 thumbs up

Thu, 06/27/2019 - 14:10

You may want to check the IGDB (International Glazing Database). It’s maintained by DOE via LBNL. The windows group at LBNL also currently has a “thin triple” research project, developing a triple glazed window to fit in a traditional IGU frame. They have partnered with a couple manufacturers to begin looking at manufacturing processes. The windows group at LBNL is a great group to get to know and have a wealth of knowledge. https://windows.lbl.gov/software/igdb STET SANBORN AIA NCARB CPHC LEED AP Principal | Engineering Discipline Lead ________________________________ SmithGroup 301 Battery Street, 7th Floor San Francisco, CA 94111 C 415.516.7946 T 415.343.2032 stet.sanborn@smithgroup.com smithgroup.com Connect with us LinkedIn | Facebook | Twitter | Instagram _________________________________ From:

Ramana Koti

Sustainable Design Leader

HKS, Inc.

LEEDuser Basic Member

11 thumbs up

Thu, 06/27/2019 - 15:29

Thanks to all for your responses. Not surprisingly, I learned that the answer as in most cases is, it depends. · One well known manufacturer seems to be accepting orders for their 1/3” thick Vacuum Insulated Glazing only on a pilot basis. · Glazing calculators let you play with possibilities but fabrication feasibility is another story. · Feasibility for thinner glazing depends on size of glazing panels (not too big, not too small), total amount of glazing needed, etc. · Custom fabrication, when possible, will likely cost more than off the shelf products. Ramana Koti Associate, BEMP, LEED AP BD+C D +1 404 253 1478 LORD AECK SARGENT A KATERRA COMPANY From: