Cardinal Glass Industries is launching Divert, a first-surface laser-etched bird-friendly glass, in Q4 2026. The product integrates with Cardinal's full LoE coating lineup—signaling that bird-safe glazing is moving from a specialty SKU to a core architectural offering.
A Mainstream Coater Plants Its Flag in Bird-Safe Glass
Cardinal Glass Industries—the dominant residential float and coater in North America—has formally entered the bird-friendly glass category. The company announced Divert, a new laser-etched product line scheduled for a fourth-quarter 2026 launch.
The move is significant less for the technology itself than for who is bringing it to market. Until now, the bird-friendly conversation has been dominated by commercial-facing fabricators like Walker (AviProtek), Viracon (SoarSafe), Guardian (Bird1st), and Vitro (BirdSmart). Cardinal's entry pulls the category squarely into the residential and light-commercial spec stack where Cardinal LoE coatings already dominate window manufacturer offerings.
What Divert Actually Is
The product is a first-surface, laser-etched solution that integrates directly into Cardinal's existing coated glass portfolio. Cardinal says Divert eliminates the need for films, interlayers, acid etching, and UV-only coatings—all of which carry trade-offs in cost, durability, or human visibility.
Key technical points from the announcement:
- First-surface, laser-etched pattern. Precision laser-etching creates first-surface patterns that are visible to birds but barely noticeable to people, with tightly controlled dot size, spacing, and pattern geometry that comply with bird-friendly standards.
- Durability advantage. Because the pattern is physically etched and not applied, it maintains lasting performance through manufacturing, handling, and years of exposure to the elements without peeling, fading, or delaminating.
- Pairs with any Cardinal LoE. With the deterrence pattern assigned to surface one, surface two remains open for any Cardinal LoE coating, preserving thermal and solar control flexibility.
- Self-cleaning standard. The glass comes standard with Cardinal's Neat+ coating, which uses sunlight to help the glass stay naturally cleaner for longer.
Why First-Surface Matters
The industry consensus has shifted decisively toward surface-one patterning for collision deterrence. Cardinal cites this directly: first-surface solutions are widely recognized as the most effective for reducing bird collisions, which is why the company began there.
That's a meaningful design constraint. Frit and ceramic enamel patterns applied to the second surface are easier to manufacture but lose effectiveness because the glass's own reflection competes with the deterrence pattern. UV-only coatings preserve human aesthetics but don't work for all bird species. Acid etch requires hazardous chemistry and isn't available at every plant. Laser etching solves all three—and it can be done in-line at the same facility where the coating is applied.
Practical Implications for Spec Writers and Window Manufacturers
1. The compliance equation just got easier on residential and mixed-use jobs.
Bird-friendly building codes are now on the books in jurisdictions including New York, California, Illinois, Ontario, Oregon, Minnesota, Washington D.C., Virginia, Wisconsin, Alberta, British Columbia, Maryland, and Maine. Most of those codes are written to commercial buildings, but mixed-use, multifamily, and institutional projects increasingly fall under their scope. Until now, specifying bird-safe glass typically meant a separate fabricator relationship. Divert lets window manufacturers source bird-safe IGUs through their existing Cardinal supply chain.
2. ASHRAE 189.1 Addendum o is coming.
The addendum's language applies to vertical windows, spandrel glass, skylights, corner glazing, and glazed railings up to 100 feet above grade in new buildings and major alterations, and requires bird-friendly glass on not less than 90% of vertical fenestration below that threshold. That's a sweeping requirement once jurisdictions adopt it—and one that residential window manufacturers have largely been able to ignore. Cardinal's entry signals the residential side is preparing.
3. The competitive set is consolidating around laser-etch surface-one.
Viracon's SoarSafe achieves American Bird Conservancy Threat Factors of 20 or 25 with less than 1% surface coverage and no thermal performance impact. Vitro's BirdSmart uses the same approach at its Wichita Falls plant. Guardian's Bird1st UV meets the Threat Factor ≤25 required by NYC Local Law 15. With Cardinal now in the mix, the laser-etch + LoE configuration is the de facto standard architects can specify across fabricators without major performance trade-offs.
4. Q4 2026 means specifications written this fall need to flag it.
Projects bidding in late 2026 and early 2027 can reasonably include Divert in basis-of-design language. For window manufacturers running Cardinal IGUs, that's a low-friction add to product literature.
Bird-friendly glazing has spent a decade as a niche commercial specialty. Cardinal's announcement is the clearest signal yet that it's becoming a standard checkbox on the coated glass menu.