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How to Restore Timber Sash Windows in CambridgeMany homes in Cambridge have sash windows that are traditional and homeowners are proud of their appearance. However, sash windows may become stuck and difficult to open or close. This is usually due moisture which can cause the wood to expand.Traditionally, window boxes used chains or cotton cords and weights made of lead to operate. Modern windows with sash springs are concealed to eliminate this issue.1. AestheticsIn contrast to PVC-u windows, which are constructed according to the modular imperial size, timber sash windows can be restored to their original size. This lets the restoration meet modern day energy requirements while still complying with conservation areas regulations. It also provides windows that have a superior appearance than uPVC alternatives.Sliding sash windows were originally only used in large structures or public buildings, but this changed as production became less expensive and craftsmen could produce larger frames with more glass. In the late 18th century Sash windows were the most popular wooden design in most British properties. Sash windows were easy to operate and let light in rooms without the need for curtains.The early windows were made of glass that was plain, but by the 17th Century, sash windows began to become more ornamental. They were initially made of colored glazing bars, also known as mullions. They were costly initially, but as glass production became cheaper and more efficient, they became commonplace in many homes of the period.In the 19th century, it was possible to make large, sturdy glasses that did not require support bars. This allowed the frame to be enlarged which, in turn, provided an improved view. This was a significant innovation.Another important improvement was the introduction of the double-hung sliding windows at the end of I920s and at the beginning of the I930s. The double-hung sliding sash was a significant improvement that came about at the end of the I920s and at the beginning of the I930s.The most popular type of sash is constructed from slow grown deal (pine) however oak was also used in more prestigious buildings and in earlier examples. It is crucial to maintain the parting bead which divides the sashes. This will help prevent rattles and draughts. It is also crucial that the idler and sash pulley wheels are kept in good working order as they help to operate the window.2. Energy efficiencySash windows replaced hinged casements as clearer and larger sheets became available. Glass plates were set in frames of timber that were rebated, then secured with glazing sprigs and putty was applied to the frame's two sides to ensure watertightness. This kind of glazing gradually superseded led lights.The introduction of sashes resulted in an need for a greater variety of ironmongery, including the most basic fittings, brass pulleys, lead (and later cast iron) weights, sash stoppers shutter hinges, knobs and shutters, and a range of fasteners that secured the sashes into the right place. These were often decorated with motifs, inscriptions or designs that were engraved to identify the maker.With regular maintenance, sash windows are extremely energy efficient. If they are not maintained they can get noisy. Putty and paint can cause draughts too. This can be fixed by using proprietary wood-to-timber repair products.The industry of replacement windows relies heavily on the belief that older windows are beyond repair and therefore cannot be maintained economically. However windows can be easily maintained with a little attention. However, repairs to these windows can be costly and cause significant disruption to your home. To prevent this homeowners, many opt for a complete replacement with PVC-u windows made by one of the many "one stop shop" installation companies. They can replace all windows in a home in a single day, saving time and eliminating 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 windows made of sash. However these double-glazed units are unable to duplicate the proportions and section of historic timber sashes.3. SecurityTraditional windows can be made secure without compromising their aesthetics. Ironmongery, such as sash chain, mortice bolts and sash lock could be put in place. These can be installed in a way that the window remains able to be opened for ventilation or cleaning. They are usually discrete since they are made to work with sash windows. They can be utilized in conjunction with traditional sash-window catches that must be replaced by more robust models (such as those incorporating double screws) or spring-loaded levers to minimize the risk of them being opened by hammering.Sash-window frames are traditionally made of oak or slow-grown deal. If the glazing bars are intact and are not damaged, they should be left. If it is it is possible, the cills of the timber should be replaced by timber that is compatible with. PVC-u companies often provide a one-stop shop installation service that can remove 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. VentilationSash windows were introduced in the 17th century and allowed for a significant amount of light to enter buildings. At the end of the 18th century they were adapted to allow more light into rooms, and larger glazing panes began to be produced. The result was a more streamlined appearance, and windows with a higher degree of elegance than before.Sash windows were introduced, which required a new range ironmongery. Early pulleys were of wood, later Victorian ones were made from brass or a mixture of lead and wood, and there were a variety of shutter hinges and knobs. These ironmongery pieces should be cleaned and preserved to appreciate their exquisite design.Timber windows require careful maintenance to ensure they remain in good order. Inattention to maintenance routinely could cause:Sashes that do not slide easily.holes in the frame that admit water, which can cause damage and decay.break down of putty allowing water to penetrate, which can lead to decay in the frame and cill.Steel casement windows gained popularity in the I920s and I930s because they were strong and slim, and also because they were cheap and matched the trend of healthy living. However, research has revealed that traditional softwood sash windows are just as thermally efficient as PVC-u double-glazed windows, and are 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 old, dirty, and beyond economic repair. The truth is that a lot of old timber windows are in good shape and with minor repairs can easily be repaired for many years to come.5. MaintenanceA traditional sash window needs regular maintenance and inspection. If you fail to maintain your sash window, it can result in the sash cords breaking, and the glazing bars wearing out excessively. It can also cause paint and putty degrade. The removal of the sashes can also result in structural movement within the frame that causes the sash to become misaligned and not closing properly. The sash can also be stuck in its open position, which allows water and draughts into the property.repairmywindowsanddoors is the most common cause of damage to windows made of timber. This can be avoided by careful painting, regular repairs, and removing the source of dampness. The paint can be removed to expose the soft, rotting wood. Any rotten sections of timber should be cut out and the affected area should be carefully wrapped or pieced back using replacements made from the same type of wood as the ones that remain. This method of repair increases the amount of fabric used in the first place and is among the most minimally invasive methods of treating wood-to-timber rot.The use of a resin-based wood consolidant is another alternative to traditional sanding and staining. It is brushed on the surface of the wood to help stabilize it and protect it from further damage. It is particularly useful in the treatment of sash cords and pulleys which help stop breakage.It is important that any old ironmongery like sash stays and latches are kept and rehabilitated instead of being replacing them. It can be difficult to replace these items without altering their original design. It is also advised that fittings made of aluminum like sashlifts, as well as chainstays, be avoided as they could cause corrosion and deterioration of timber frames and sashes.