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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 usually due to moisture, which can cause the timber to expand. Box sash windows were previously operated using chains or cotton cords, as well as weights made of lead. Modern sash windows have hidden springs to address this issue. 1. Aesthetics Timber sash windows, in contrast to PVC-u windows that are made in imperial sizes, which are modular, can be restored to their original size. This allows the restoration to meet the current energy standards while complying with conservation areas regulations. It also offers windows that have a more attractive appearance than uPVC alternatives. Sliding frames for windows made of sash were originally intended for large structures or public buildings. However this changed as production became more affordable and artisans could produce larger frames with more glass. By the end of the 18th century, sash windows were the most sought-after wooden style in British homes. Sash windows were simple to operate and let light in rooms without the need for curtains. The first windows were made of plain glass but by the 17th century sash windows started to become more attractive with coloured glass bars and moulded mullions. They were costly at first, but when glass production became less expensive and more efficient, they became a common feature in many historic homes. In the 19th century it was possible to create large, strong glass that did not need supporting bars. This allowed the frame size to be enlarged further and this in turn allowed for a wider view out of the window. This was an important innovation. Another significant improvement was the introduction of the double-hung sliding window at the end of I920s and at the beginning of the I930s. The double-hung sliding sash is another significant improvement that came about at the end of the I920s and at the beginning of the I930s. Oak was used for older examples and for more prestigious buildings. A parting bead is used to separate the two sashes, and it is essential that it is maintained in order to avoid rattles and drafts. It is also crucial that sash pulleys and idler wheels are kept in good condition as these assist in operating the window. 2. Energy efficiency Sash windows were replaced by hinged casements as larger and clearer sheets were made available. Plate glass was set into frames made of timber, which were secured with glazing sprigs and putty was sprayed on the frame's two sides to ensure watertightness. This form of glazing gradually replaced led lights. The introduction of sashes created a need for a much greater variety of ironmongery, with the basic fittings being brass pulleys, lead (and later cast iron) weights, sash stops, shutter hinges and knobs as well as a range of fasteners used to keep the sashes to their place. They were often decorated with motifs, inscriptions or engravings that identified the maker. With regular maintenance, sash windows are extremely energy efficient. However, without this maintenance they can become draughty and let in cold air. Paint and putty may also cause draughts. This can be fixed by using wood-to-timber repair products that are specifically designed for this purpose. The industry of replacement windows relies heavily on the perception that old windows are damaged beyond repair and therefore cannot be maintained economically. However windows can be easily maintained with a little attention. Repairs can be expensive and cause many disruptions in the home. To avoid this homeowners, many prefer to replace their windows with PVC-u windows from one of the many “one stop shop” installation companies. Repair My Windows And Doors can take down and replace all windows in a house in a single day, avoiding the need to coordinate different tradesmen and making the entire process much faster. They can also be supplied with 'energy saving' double-glazing, which can achieve higher energy efficiency ratings than are possible with traditional windows with sash. These double-glazed windows aren't capable of resembling the proportions and sections of historic timber sashes. 3. Security Traditional windows can be secured without compromising their appearance. Many types of ironmongery can be installed with sash chains, mortice bolts, and sash locks. These can be installed in a manner that the window is able to be open for ventilation and cleaning. These windows are typically not noticeable since they are designed to work with sash windows. They can be used with traditional sash window catch. They should be replaced with more robust versions like those with double screws or sprung levers in order to reduce the risk of being hit with hammers. Sash-window frames are typically made of oak or slow-grown deal. If the glazing bars remain in good condition and are not damaged, they should be left. If it is possible, the timber cills should be replaced with wood that matches. Many PVC-u firms provide a one-stop shop installation service. They can remove and replace windows on a complete home in one day, without involving other tradespeople. 4. Ventilation Sash windows were introduced in the 17th century and allowed for a large amount of light to be absorbed into buildings. By the end of the 18th century, they were adapted to allow more light into rooms and bigger glazing panes started to be made. The result was a more light appearance and windows that were more elegant. Sash windows were introduced and required a new range ironmongery. Early pulleys were made from wood, later Victorian ones could be made from brass or a combination of lead and wood, and there were various types of shutter hinges and knobs. Ironmongery elements must be retained and cleaned down so that the quality of their design can be appreciated. Timber windows require regular maintenance to ensure they remain in good order. Lack of regular attention may result in: Sashes that do not slide easily. Holes in the frame that allow water to get in and cause damage and decay. Water can get into the putty and cause decay to the frame or the cill. In the I920s and I930s steel casement windows gained popularity because they were strong slim and affordable and also matched the fashion for healthy living. Studies have shown that softwood sash windows are as efficient as PVC-u windows and can even be more attractive. The replacement window industry has made a significant effort to convince homeowners that their traditional windows are dirty, noisy and beyond repair. Many old timber windows can be fixed and used for a long time with minor repairs. 5. Maintenance A traditional sash window needs regular maintenance and inspection. Inability to keep up with this could result in broken sash cords, excessive wear on the glazing bars and degradation of the paint and putty. The removal of sashes could also result in structural movement within the frame which causes the sash to become misaligned and not closing properly. It is also possible for the sash be snagged or fixed in an open position and this can let water and draughts in the property. Moisture penetration is the most common cause of damage to windows made of timber. This can be avoided by thorough painting, regular repairs and the elimination of the source of dampness. The paint can be removed to reveal the soft, decaying wood. Any rotten timber sections should be cut out and the affected area should be carefully cut or pieced with replacements made of the same type of timber as those remaining. This method of repair maximizes the amount of fabric that was originally used and is one of most non-invasive methods to treat timber-to-timber rot. The use of a resin-based wood consolidant is another alternative to traditional staining and sanding. This is brushed on the surface of the wood to protect it and stabilise it. It is particularly beneficial for the treatment of sash cords and pulleys which help stop breakage. It is crucial that any historic ironmongery such as sash stay and latches are retained and restored instead of replacing them. It can be difficult to replace these items without compromising their original design. It is also recommended that the use of modern aluminium fittings such as chain stays and sash lifts is avoided whenever possible since they can cause corrosion and deterioration to frames and sashes made of timber.