Sping assisted sash windows
The spring sash version of the traditional sash, removes the need for the large weights hidden in the upright sections of the window frame. By replacing the weight with a tensioned spring hidden within the window ‘track’, the width of the uprights can be reduced meaning that smaller windows can still allow in the maximum amount of light.

 
Paxtons Timber Windows is a trading name of Paxtons Home Improvements Limited