Zola Windows' new Sanctuary Glass, available across all of its window product lines, is designed to reduce sound transmission and mitigate outside noise in homes or offices. The Sanctuary Glass builds on Zola’s existing sealed and thermally-broken window designs, providing both sound protection and energy-efficient performance.

The glass is composed of three panes of varying thicknesses spaced at uneven widths. The outermost pane is laminated with Zola’s Sanctuary Acoustic Lamination, which provides an additional sound barrier. The outer panes are coated in low-emissivity film, and the gaps between panes are filled with gas insulation.

Third-party testing on certain sample windows has produced sound transmission loss of up to 44 STC and 37 OITC. STC (Sound Transmission Class) measures transmission loss between 140 and 4,000 Hz, which covers human speech, and OITC (Outside Inside Transmission Class) measures transmission loss from 80 to 4,000 Hz, which covers lower frequencies including engines and speakers.

"Sanctuary glass is a breakthrough for a building. The difference relative to regular glass is truly remarkable, and the moment of closing the window creates instantaneous serenity. It is not just about the glass, the window frame needs to be able to match the glass performance - which only a highly airtight window like Zola will be able to do…With our new offering, we have just the right match between glass, frame and air seals to achieve optimum results," says Florian Speier, vice president and head of product development for Zola Windows.