In some cases, the common box sash windows have been very popular in classic and modern houses in the United Kingdom and also in the United States. Sash window refers to a kind of window that has sliding panels. These were made usually with a weight supported by a pulley system which was used for opening the panes of the sliding window.
Originally, these kinds of windows were made to fit Double Glazing Sash Windows Thanet Victorian and Georgian houses. You can find such kinds of windows in the softwood or hardwood variety today, and in UPVC materials. They originally were glazed in single but modern ones are available as single glazed and double glazed windows.
These olden windows are made with the hollow section inside the window frame that grasps the weight of the sash. The weights of the sash are attached to the sash cord that is then connected to the sliding part of the window pane. It is common for the sash weights in the weight and pulley system to be made out of lead; however, more recent kinds made use of sash weights that are made from steel.
The sash cord which connects to the weight is produced from pre-stretched braided cotton. In addition, it has a polished finish. These materials and finishes allow the cord to resist wear and tear. The new kinds of sash cords are made of newer and synthetic materials and fibres such as polypropylene and nylon. These increases the resistance of the sash cord from abrasion.