Listed buildings often carry penalties for carrying out work that has not been approved, such as replacing windows. When replacing windows isn’t an option, secondary glazing is the ideal alternative. It is strong, reliable and long-lasting, whilst also contributing to preventing external sound and noise entering. When fitted with balanced trickle ventilation, secondary glazing reduces the likelihood of condensation posing a problem, while also acting as a second layer and additional barrier against unauthorised access to your premises.