Elephant House is a rare example of an industrial complex found in inner-city London. It is sited alongside the city's early Regent's Canal. Hawkins\Brown was commissioned to draw up plans to change the Grade II Listed building into offices. The project needed to be carefully considered ensuring a sustainable, comfortable and safe working environment was created for the new tenants. The original single glazed windows presented a problem as they were draughty and did little to combat noise from the busy roads outside. Working with Selectaglaze, secondary glazing was a solution to achieving high levels of noise attenuation and thermal insulation. A total of 8 windows were treated with two different styles of openings from Selectaglaze's heritage range, which is readily accepted by English Heritage and other agencies for use in Listed buildings. A single hinged panel with a curved head was used in most of the openings, which mimics the original and allows access to the primary window. The discreet frames along with flush hinges and flush locks created a flawless look and achieved the desired benefits, without compromising the beauty of the original Victorian windows.