French glass and construction materials company Saint-Gobain has invested $80m for a minority stake in Sage Electrochromics, a US-based maker of tinted windows.

French glass and construction materials company Saint-Gobain has invested $80m for a minority stake in Sage Electrochromics, a US-based maker of tinted windows.

US pension fund TIAA CREF also invested as part of the round, after advice from Barclays Bank.

The deal came a year after Saint-Gobain launched its consolidated advanced glazing division and its Quantum Glass brand but the intellectual property, manufacturing and research will now be down with Sage under a merged operation with more than 100…