Putney Bridge Road SW18, complete renewal with acoustic glass

Putney Bridge Road is one of the busiest in South West London, running alongside the River Thames and linking the South Circular to Putney Bridge. In addition to this heavy flow of traffic Mr M’s property backs right onto a railway line. In fact, the track was originally built so close to the property that part of the house was cut off to allow trains to pass by. Therefore, it would be no surprise that the main reason for Mr M’s enquiry was to reduce the disruptive noise.

We quoted the customer the best available double glazed acoustic glass; 8.8mm acoustic glass / 12mm Argon gas filled spacer bar / 4mm clear glass = 24.8mm acoustic double glazed units. When installing the highest quality acoustic glass for sound reduction we always advise potential customers to choose our complete renewal option, rather than the sash replacement option. There are a couple of reasons for this:

• Firstly, it is not possible to install the thickest glass with our sash replacement option. This is because the thickness of our new sashes is governed by the existing box frame. Generally, the thickest sashes we install as part of a sash replacement option are 45mm with a 20mm double glazed unit. With new box frames, our sashes are 57mm thick. With acoustic glass, it is vital to have the maximum amount of space possible for the glass, and the acoustic double glazed units we used for Mr M are 24.8mm thick.
• Secondly, with our sash replacement option we add new lead weights onto the existing steel weights in order to keep costs to a minimum for our customers (please see more details about this on our Sash Replacement Service page). Acoustic glass is so heavy that the amount of lead weight we would need to add would make the counterbalancing weights almost as long as the box frame itself, severely restricting travel of the sashes. We therefore advise our complete renewal option with acoustic glass.