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How to Restore Timber Sash Windows in CambridgeMany homes in Cambridge feature traditional sash window and the homeowners are proud of their appearance. Sash windows can become stuck and are difficult to open or shut. This is usually due to moisture which can cause the timber to expand.Traditionally, window boxes utilized chains or cotton cord and weights made of lead to operate. Modern sash windows come with hidden springs to overcome this issue.1. AestheticsUnlike PVC-u windows that are made to modular imperial sizes Timber sash windows can be restored to their original sizes. This lets the restoration meet modern day energy requirements while still complying with conservation area regulations. It also offers windows that are superior to uPVC alternatives.Sliding sash window frames were initially only used in large buildings or public buildings. However this changed as production became less expensive and craftsmen could create larger frames using greater glass. By the late 18th century Sash windows were the most popular wooden style in a majority of British properties. As they were easy to open, sash windows let light into rooms without the need for curtains.Early windows were plain glass, but by the 17th century sash windows began to become more decorative, with coloured glazing bars and moulded mullions. They were expensive initially, but as glass production became less expensive and more efficient, they became an integral feature in many period houses.By the 19th century it was possible to make large, strong glass that did not require supporting bars. This allowed for the frame to be made larger and, in turn, gave the viewer a better view. This was a very important advancement.The introduction of the double-hung sliding sash was a important improvement that was made at the end of the I920s and the beginning of the I930s. The double-hung sliding sash was another important improvement that was made at the end of the I920s and at the beginning of the I930s.Oak was used in older examples and more prestigious buildings. It is important to maintain the separation bead that is used to separate the sashes. This will prevent draughts and rattles. The idler wheels, sash pulleys and sash rollers also are crucial to the functioning of the window.2. Energy efficiencyAs clearer and larger glass sheets were made available, sash windows started replacing hinged casements. They were glazed with plate glass set within rebated timber frames and secured with glazing sprigs and putty on both sides to ensure they were watertight. This type of glazing gradually replaced led lights.Sashes were introduced, which led to an increase in demand for ironmongery. The basic fittings included brass pulleys (and later cast-iron) weights as well as sash stoppers shutter hinges and handles and various fasteners used to secure the sashes. They were often decorated with designs, inscriptions, and patterns engraved to identify the maker.With regular maintenance, sash windows can be extremely energy efficient. However, if they are not maintained, they can become drafty and let in cold air. Draughts can also be caused by the breakdown of putty and paint. It is possible to fix this issue by using wood-to-timber products.The market for replacement windows is based heavily on the perception that older windows are beyond repair and therefore cannot be maintained economically. However they can be maintained with a bit of attention. These repairs can be costly and cause a lot of disruption in the home. To prevent this, many homeowners prefer to replace their windows with PVC-u windows made by one of the many 'one stop shop' installation companies. These can remove and replace all the windows in an entire house within a single day, avoiding the need to coordinate different tradesmen, making the whole process much quicker. They are also available with 'energy saving' double-glazing to achieve higher energy efficiency ratings than traditional windows made of sash. However, these double-glazed units cannot duplicate the proportions and section of traditional timber sashes.3. SecurityTraditional windows can be secured without compromising their aesthetics. There are many types of ironmongery that can be fitted including sash chains mortice bolts and locks for sash. These can be installed in such a way that the window is able to be opened to allow ventilation and cleaning. They are generally unobtrusive, as they are designed to match the sash window. They can be used in conjunction with traditional sash window catches. These should be replaced by more robust versions like ones that have double screws or spring levers in order to reduce the chance of being hammered.Sash-window frames were traditionally made from slow-growing deal or, in the more elegant homes made of oak. If the glazing bars are in good condition and are not damaged, they should be left. If window doctor cambridge www.repairmywindowsanddoors.co.uk is possible, the timber cills should be replaced with wood that matches. Many PVC-U companies provide a one-stop shop installation service. They can take out and replace windows on an entire home in one day, without involving any other tradespeople.4. VentilationSash windows were first introduced in the 17th century and allowed for a huge amount of light into buildings. At the end of the 18th century, they were altered to allow more light into rooms and larger glazing panes began to be manufactured. The result was a lighter look and windows that were more elegant.Sash windows were introduced, which required a new range ironmongery. Early pulleys were of wood, whereas later Victorian ones were made of brass or a mixture of lead and wood, and there were a variety of shutter hinges and knobs. The ironmongery components should be kept and cleaned so that the quality of their design can be appreciated.Timber windows require regular maintenance to ensure they remain in good shape. Inattention to maintenance routinely could cause:Sashes that do not slide easily.Holes in the frame that allow water to enter and cause damage and decay.Water can penetrate the putty and cause decay to the frame or cill.In the I920s and I930s, steel casement windows grew in popularity due to their durability slim and affordable, and complemented the vogue for healthy living. Studies have shown that softwood sash window are just as effective as PVC-u windows, and may even be more attractive.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 timber windows can be repaired and used for a long time with minor repairs.5. MaintenanceTraditional sash windows require regular maintenance and inspection. Inability to maintain it properly could result in the sash cords breaking, a lot of wear on the glazing bars and the deterioration of putty and paint. The removal of sashes can also cause structural movement in the frame, causing the sash to not close properly. The sash may also become stuck in its 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 with thorough painting, periodic repairs and the elimination of the source of dampness. Wet rot is easily identified due to the wavy appearance of the existing paint which can be stripped to reveal soft, rotting timber. The sections of timber that are rotten should be carefully removed and the affected area should be scarfed together or glued together with replacements of the exact type as the remaining timber. This method of repair maximizes the amount of fabric that was originally used and is one of most non-invasive methods to treat wood-to-timber rot.A wood condenser that is based on resin is an alternative to the traditional sanding or staining. This is brushed on the surface of the wood to protect it and stabilize it. It is particularly useful in the treatment of pulleys and sash cords which can help prevent the breakage.It is important that any ironmongery from the past such as sash stay and latches be kept and rehabilitated instead of being replaced. These items are difficult to replace without harming the the original design. It is recommended that the use of modern aluminum fittings like chain stays and sash lifts should be avoided if possible as they can cause corrosion and deterioration to timber frames and sashes.