Trade Timber Windows and Doors London are experts in the installation of traditional sash windows and a week ago we visited a 7 bedroom Edwardian townhouse in South Norwood where we fitted 10 new sash windows. Working with a small budget, we were impressed with the property which was beautifully restored for the elderly lady who lives there with her daughter and son-in-law. Working with a small budget, we designed and installed new sash windows for the lower ground and first floors. The house now has improved energy efficiency along with enhanced external and internal appearances.