For the first time, an aerogel glazing material has been tested and listed in the International Glazing Database, letting manufacturers model double-pane IGUs at center-of-glass U-values of 0.13 to 0.16. The practical implication: triple-pane thermal performance without the triple-pane sash, frame, or weight penalty.
The First Aerogel Entry in the IGDB
AeroShield Materials has become the first company to get a transparent aerogel glazing product tested and listed in the International Glazing Database (IGDB), the industry-standard thermal and optical reference maintained by Lawrence Berkeley National Laboratory. AeroShield Materials' transparent aerogel glazing has been tested and listed in the IGDB, and company officials say it's the first aerogel product to achieve the milestone.
For specifiers, that distinction matters more than the material-science novelty. An IGDB listing is the gateway to legitimate thermal modeling in the tools the entire fenestration industry relies on. With AeroShield's aerogel glass now listed in the IGDB, window manufacturers and their simulation partners can model AeroShield-enabled IGU configurations directly in Lawrence Berkeley National Laboratory's WINDOW software or similar tools.
Until that listing happens, a glazing product can carry marketing claims but cannot show up in NFRC-pathway U-factor or SHGC simulations. For a brand-new material class, this is the moment it enters the spec sheet.
What the Numbers Say
The reported performance is aggressive. The results confirm that an AeroShield-enabled double-pane insulated glass unit can achieve center-of-glass U-values of 0.13 to 0.16. The aerogel is compatible with a range of glass thicknesses and Low-E configurations, giving manufacturers the ability to meet or exceed higher thermal targets within standard double-pane systems.
To put that in context, a conventional double-pane IGU with a decent low-E coating typically lands in the 0.24 to 0.29 U-value range at center of glass. Triple-pane IGUs push that down into the 0.14 to 0.20 range, but at a cost in weight, thickness, and framing complexity. A 0.13 to 0.16 center-of-glass U-value in a double-pane assembly is roughly triple-pane territory without the triple-pane envelope.
AeroShield's CEO Dr. Elise Strobach framed the implication directly: "A center-of-glass U-value of 0.13 in a double-pane unit changes the conversation about what is possible without moving to triple pane."
Why Manufacturers Should Care
The fabrication story is as important as the thermal number. AeroShield's aerogel is bonded directly to the glass surface, allowing it to be handled and fabricated within existing IGU production processes. Delivering triple-pane performance without a third glass pane reduces reliance on custom sash and frame designs, lowers overall window weight, and meets homeowners' growing needs for enhanced thermal performance.
For window manufacturers staring down Energy Star 7.0 compliance and increasingly aggressive residential energy codes, that's a strategic alternative to re-tooling for triple pane. The capital expense of widening sash profiles, reinforcing hinge hardware, and redesigning multi-slide and casement operators to carry a third lite is non-trivial. An aerogel-bonded lite that drops into existing double-pane lines sidesteps most of that.
The Supply Reality
Supply is still the constraint. AeroShield is currently producing aerogel IGUs in limited volumes from its pilot manufacturing facility in Waltham, Massachusetts.
That means early adopters, high-performance residential brands, and passive-house-oriented commercial projects are the realistic near-term market. Mass-market vinyl replacement windows are not getting aerogel lites next quarter. But the IGDB listing changes the planning horizon: product teams can now spec, model, and quote AeroShield-enabled configurations in NFRC-recognized simulation tools without waiting for a custom test regime.
Practical Implications for the Industry
- Architects and specifiers: You can now request NFRC-pathway U-factor and SHGC numbers for AeroShield-enabled IGUs the same way you would for any other glass makeup. For projects chasing passive house, LEED, or stretch-energy-code targets, that opens a double-pane path to numbers that previously required triple pane.
- Window and door manufacturers: The retrofit math on existing double-pane production lines just got more interesting. Instead of a capital project to add a third pane, the question becomes whether aerogel supply can meet the volumes needed to differentiate a product line at Energy Star 7.0 or beyond.
- Building envelope consultants: Thermal modeling of fenestration assemblies at the whole-wall level now has a new input variable. A 0.13 U-value center of glass meaningfully shifts the WWR trade-off in cold-climate commercial work, particularly on retrofit projects where frame replacement is off the table.
The IGDB listing isn't a product launch. It's the moment aerogel stops being a lab curiosity and starts being something a specifier can actually put in a window schedule.