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How to Restore Timber Sash Windows in Cambridge Many homes in Cambridge have sash windows that are traditional and the homeowners are proud of their appearance. However, sash windows can become stuck and difficult to open or close. This is typically due to moisture, which can cause the wood to expand. Traditionally, window boxes used chains or cotton cords and lead weights to operate. Modern window springs for sash windows are concealed to solve this problem. 1. Aesthetics Unlike PVC-u windows that are manufactured according to the modular imperial size, timber sash windows can be restored to their original sizes. This allows the restoration to meet the current energy standards while still complying with conservation regulations for the area. It also gives windows with a superior appearance than the uPVC alternatives. Sliding sash windows were initially only found in large buildings or public buildings, though this changed as production was less expensive and craftsmen were able to produce larger frames with more glass. In the 18th century, windows made of sash were the predominant design of wood in the majority of British properties. Sash windows were easy to operate and let light in rooms without the use of curtains. Early windows were simple glass, but by the 17th century, sash windows were becoming more decorative, with coloured glazing bars and moulded mullions. They were expensive initially, but as glass production became less expensive and more efficient, they were commonplace in many period houses. In the 19th century, it became possible to produce large, sturdy glasses that didn't require supporting bars. This allowed the frame's size to be increased even further, which gave a better view from the window. This was an important innovation. plastic window repair of the double-hung sliding sash is another important improvement that was made at the end of the I920s and the beginning of the I930s. The double-hung sliding sash was another significant improvement that came about at the end of the I920s, and at the beginning of the I930s. Oak was used in older examples and for more prestigious buildings. A parting bead is used to separate the two sashes. It is vital that it is maintained in order to avoid rattles and draughts. The idler wheels, sash pulleys and sash rollers also are crucial for the proper operation of the window. 2. Energy efficiency Sash windows replaced hinged cases as larger and clearer sheets became available. They were glazed with plate glass set in timber frames with rebates and secured with glazing sprigs, and then putty on both sides to create a watertight seal. This type of glazing gradually replaced the leaded light bulbs. The introduction of sashes created the need for a larger variety of ironmongery including the most basic fittings, brass pulleys as well as lead (and later cast iron) weights, sash stoppers shutter hinges and knobs and a variety of fasteners used to keep the sashes into the right place. These were often decorated in patterns, inscriptions and engraved patterns to identify the maker. Sash windows are energy efficient if they are maintained regularly. But, if you don't maintain them, they may become drafty and let in cold air. Draughts can also be caused by the breakdown of putty and paint. This can be remedied by using wood-to-timber repair products that are specifically designed for this purpose. The market for replacement windows is based heavily on the belief that old windows are damaged beyond repair and therefore cannot be maintained economically. However, they can easily be maintained with a little attention. Repairs can be costly and cause many disruptions in the home. Many homeowners decide to replace their windows using PVC-u from a 'one-stop shop' installation company. These can remove and replace all the windows in a home within a single day, avoiding the need to coordinate multiple tradesmen and making the whole process much quicker. These windows can be fitted with 'energy-saving' double glazing to achieve higher energy ratings than traditional windows made of sash. Double-glazed windows aren't capable of resembling the proportions or section of sashes from old timber. 3. Security It is possible to secure windows that are traditional without compromising their appearance. Ironmongery, such as sash chain, mortice bolts and sash lock could be used. These can be installed in a way so that the window can still be opened to allow ventilation and cleaning. These products are usually unobtrusive, as they are designed to fit the sash window. They can be used in conjunction with traditional sash window catches. They are best replaced with more robust versions like those with double screws or spring levers in order to reduce the possibility of being hit with hammers. Sash-window frames were traditionally constructed from slow grown deal or, in the more luxurious homes, from oak. When glazing bars have survived they should be preserved, and if it is possible, the timber of the cill should be replaced with identical wood. Many PVC-U companies provide a one-stop shop installation service. They can take out and replace windows on a complete home in a single day, without involving other tradespeople. 4. Ventilation Sash windows were first introduced in the 17th century and allowed for a large amount of light into buildings. By the end of the 18th century they were adapted to allow even more light into rooms, and bigger glazing panes started to be made. The result was a lighter appearance and windows that were more elegant. The introduction of sash windows also necessitated the creation of a new line of ironmongery. Early pulleys were made from wood, later Victorian ones could be made from brass or a mixture of lead and wood, and there were many kinds of shutter hinges and knobs. The ironmongery pieces need to be maintained and cleaned to appreciate their beautiful design. To keep them in good condition, wooden windows need to be maintained. A lack of regular attention can lead to: Sashes that do not move easily. Holes in the frame that allow water to get in and cause damage and decay. break down of putty allowing water penetration that could lead to decay of the frame and cill. In the I920s and the I930s steel casement windows grew in popularity due to their durability slim and affordable and also matched the fashion for healthy living. However, research has revealed that traditional softwood sash windows are just as thermally efficient as double-glazed windows made of PVC-u, and can be more attractive than the sleek lines of contemporary casement windows. The window replacement industry has done a lot to persuade house owners that their windows are rotten, draughty and beyond economic repair. Many old windows made of timber can be repaired and used for a long time with minor repairs. 5. Maintenance A traditional sash window needs regular maintenance and inspection. If you do not maintain your sash window, it can cause the sash cords breaking and the glazing bars deteriorating excessively. It could also cause paint and putty become damaged. The removal of sashes can also result in structural movements within the frame, which can cause the sash to not close properly. The sash may also become stuck in the open position, which allows water and draughts into the property. Damage to timber windows is often caused by moisture entry. This can be prevented by regular maintenance, thorough painting and removing the source of dampness. The paint can be removed to reveal the soft, rotting wood. The sections that are rotting should be carefully cut out, and the affected area should be snared together or glued together using replacements of the same kind as the timber that remains. This method of repair maximizes the amount of fabric left, and is among the least invasive ways of treating decay of timber to timber. The use of a resin-based wood consolidant is a different option to the traditional method of staining and sanding. It is brushed onto the surface of the wood to protect it and stabilise it. It is especially useful for treating sash and pulley cords, which can stop breakage. It is crucial that any historic ironmongery like sash stays and latches be kept and rehabilitated instead of being replacing them. These items are difficult to replace without damaging the quality of the original design. It is also advised that fittings made of aluminum like sashlifts, as well as chainstays, are avoided since they can cause corrosion and deterioration of timber frames and sashes.