2 expert articles on case studies for London period sash windows, from heritage specialists with 15 years' experience.

• Meet the Craftsmen: How a 50dB Noise Reduction Actually Happens in a Chelsea Townhouse — A claim of “up to 50dB noise reduction” should never be treated as a feature of the glass alone. In a period property, acoustic performance depends on…
• Can't Sleep Because of Traffic Noise? How Acoustic Secondary Glazing Cuts Noise by 50dB — How 10.8mm Stadip Silence acoustic glass and a 150mm air gap cut London traffic noise by up to 50dB in period sash windows.