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How to Restore Timber Sash Windows in Cambridge Many homes in Cambridge have traditional sash windows and homeowners are proud of how they appear. However, sash windows may get stuck and be difficult to open or close. This is often due to moisture that can cause the timber to swell. Box sash windows were previously operated by chains, cotton cords and weights made of lead. Modern window springs for sash windows are concealed to avoid this issue. 1. Aesthetics Contrary to PVC-u windows which are constructed to modular imperial sizes the timber sash windows are able to be restored to their original dimensions. This allows the restoration of timber sash windows to meet the current energy requirements and conform to conservation regulations for areas. It also comes with windows that are superior to the uPVC alternatives. Sliding windows with sash were initially only used in large buildings or public buildings, though the production process became less expensive and craftsmen could make larger frames with more glass. At the end of the 18th century, sash windows were the most popular wooden style in British homes. Because they were simple to open, sash windows let light into rooms without the need for curtains. The first windows were made of plain glass, but in the 17th century, sash windows began to become more attractive. They were initially made of colored glazing bars, also known as mullions. They were costly at the beginning but as glass production became cheaper and more efficient, they were commonplace in many period houses. In the 19th century, it became possible to create large, strong glasses that didn't require supporting bars. This allowed the frame to be made bigger and, in turn, gave a better view. This was an important innovation. Another significant improvement was the introduction of the double-hung sliding windows at the end of I920s and the beginning of the I930s. The double-hung sliding sash was a important improvement that was made at the end of the I920s and beginning of the I930s. The most commonly used type of sash is constructed from slow grown deal (pine) but oak was also used in more luxurious buildings and in some earlier examples. A parting bead separates the two sashes and it is important that this is well maintained to prevent rattles and drafts. It is also important that the idler and sash pulley wheels are kept in good working order as they aid in operating 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 then pinned with glazing sprigs, and then putty on both sides to create a watertight seal. This kind of glazing gradually replaced leaded lights. The introduction of sashes led to the need for a larger variety of ironmongery with the most basic fittings being brass pulleys as well as lead (and later cast iron) weights, sash stops shutter hinges, knobs and shutters and a variety of fasteners that secured the sashes to their place. They were often decorated with patterns, inscriptions and engraved patterns to identify the maker. Sash windows can be very energy efficient when they are maintained regularly. However, if they are not maintained, they can become draughty and let in cold air. Draughts can also result from the degeneration of paint and putty. This can be corrected using wood-to-timber repair products that are specifically designed for this purpose. The industry of replacement windows is based on the perception that older windows are old and beyond repair, whereas they are able to be maintained with a little attention. However, these repairs can be expensive and involve considerable disruption to the home. To avoid this, many homeowners choose to replace their windows with PVC-u windows from one the largest “one stop shop” installation companies. They can replace all windows in a house in one day, saving time and avoiding the need for multiple tradesmen to coordinate. They are also available with 'energy saving' double-glazing to achieve higher energy efficiency ratings than those offered by traditional sash windows. These double-glazed units are not capable of resembling the proportions and section of sashes from old timber. 3. Security It is possible to secure windows that are traditional without compromising on their aesthetics. There are many types of ironmongery that are available including sash chains mortice bolts, and sash locks. These can be installed to ensure that the window remains able to be opened to allow ventilation or for cleaning. They are generally not noticeable, since they are designed to complement the sash window. They can be used in conjunction with traditional sash-window catches and must be replaced by more robust versions (such ones that have double screws) or spring levers to decrease the chance of them being opened by hammering. Sash-window frames were traditionally constructed from slow-growing deal or, in the more luxurious homes they were made from oak. If the glazing bars are in good condition and are not damaged, they should be left. If it is feasible, the cills made of timber should be replaced with timber that is compatible with. PVC-U companies usually provide a one-stop shop installation service, which includes removing and replacing windows on an entire house in a day without the need to engage other tradespeople or coordinate visits from a number of different suppliers. 4. Ventilation When sash windows first introduced in the 17th century they allowed 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 larger glazing panes began to be produced. The result was a much lighter appearance, and windows with a higher degree of elegance than before. The introduction of sash windows also necessitated an entirely new range of ironmongery. Early pulleys were constructed from wood. Later Victorian ones were made of brass or a mixture of wood and lead. There were also a variety of types of knobs and shutter hinges. The ironmongery components should be kept and cleaned so that the fine quality of their design can be appreciated. To ensure they remain in good shape, timber windows need to be maintained. A lack of regular attention could lead to: Sashes that don't slide effortlessly. Holes in the frame that allow water to get in and cause damage and decay. break down of putty, allowing water penetration, which could cause decay in the frame and cill. In the I920s and the I930s steel casement windows gained popularity because they were strong, slim and cheap and were in line with the trend for healthy living. However, research has shown that traditional softwood sash windows can be just as efficient thermally as PVC-u double-glazed windows, and are more attractive than the sleek lines of contemporary casement windows. The replacement window industry has done a great job convincing homeowners that their old windows were decayed and drafty. They were also beyond the budget for repair. Many old windows made of timber can be fixed and used for a long time with minor repairs. 5. Maintenance A traditional sash window needs regular maintenance and inspection. If you fail to maintain your sash window, it could lead to the sash cords breaking and the glazing bars deteriorating excessively. It can also cause paint and putty deteriorate. The removal of sashes can also result in structural movement within the frame which causes the sash to become misaligned and not closing properly. The sash may also become stuck in the open position, which allows the water and drafts to enter the building. Moisture penetration is a common cause of damage to timber windows. This can be prevented by regular maintenance by thorough painting and eliminating the cause of dampness. The paint can be removed to reveal the soft, rotting wood. The rotten timber sections must be removed with care, and the affected area should be scarfed or glued together using replacements of the same kind as the timber that remains. upvc window and door repairs of repair maximizes the amount of fabric used in the first place and is among the most non-invasive methods to treat wood-to-timber rot. A resin-based wood condenser is an alternative to traditional sanding or staining. This is brushed onto the surface of the wood to stabilise and shield it from further damage. It is especially beneficial to treat sash and pulley cords, where it can prevent breakage. It is crucial to restore and not replace any historical ironmongery, like the sash latches and stays. It is difficult to replace these items without altering their original design. It is also advised that modern fittings made of aluminium like sashlifts and chainstays, are avoided since they can cause corrosion and deterioration of timber frames and sashes.