Product /
Jan 31, 2019

Zola Introduces Acoustic Performance Glazing

Zola Windows Sanctuary Glass Exterior

Window and door manufacturer Zola Windows says its Sanctuary Glass uses wide spacing, sound-absorbing lamination, and thick glass panes to achieve high acoustic performance.

"Sanctuary glass is a breakthrough for a building,” says Florian Speier, vice president and head of product development for Zola Windows. “The difference relative to regular glass is truly remarkable, and the moment of closing the window creates instantaneous serenity.”

The glazing, the company says, deliver not only sound protection but also energy performance and visible transmittance.

Zola Windows Sanctuary Glass Illustration

Zola says the performance is not just about the glass; the window frame needs to be able to match the glass performance. The frame also needs to be engineered to carry the additional weight of Sanctuary Glass, Speier adds.

Available on any Zola window, Sanctuary Glass has certified third-party testing results reaching up to 44 STC and 37 OITC for Thermo Clad Sanctuary Glass tilt-turn windows, 44 STC and 35 OITC for American Heritage Simulated Double Hung Sanctuary Glass tilt-turn windows, and 40 STC and 35 OITC Thermo uPVC Sanctuary Glass tilt-turn windows.

Zola Windows Sanctuary Glass Kitchen

“STC, or Sound Transmission Class, measures transmission loss between 125 Hz and 4,000 Hz,” the company says. “This range covers most common sounds—human speech, barking dogs etc. The STC rating averages sound transmission results over a few points in between these frequencies. OITC, or Outside Inside Transmission Class, meanwhile, measures transmission loss from 80 to 4,000 Hz. The lower frequencies included in OITC mean that it is a better measure for blocking sounds often associated with transportation, speakers, and subwoofers.”

Sanctuary Glass windows are ideal for buildings and houses near busy streets or highways, train stations, and airports.

Zola Windows Sanctuary Glass bath

Nigel F. Maynard

Nigel F. Maynard is the Editor of PRODUCTS. 

@ @