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How to Restore Timber Sash Windows in Cambridge Many homes in Cambridge have sash windows with traditional designs and homeowners are proud of how they look. Sash windows can get stuck and become difficult to open or shut. This is usually due to moisture that can cause the wood to swell. Box sash windows were historically operated with chains or cotton cords as well as lead weights. Modern sash windows feature hidden springs to solve this problem. 1. Aesthetics In contrast to PVC-u windows, which are constructed according to the modular imperial size the timber sash windows are able to be restored to their original sizes. This permits the re-installation of timber sash windows to meet the current energy requirements and to comply with conservation area regulations. It also provides windows that have a more attractive appearance than uPVC alternatives. Sliding sash windows were originally only used in large structures or public buildings, but this changed as production became cheaper and craftsmen could make larger frames with more glass. In the late 18th century windows made of sash were the predominant design of wood in the majority of British homes. Sash windows were simple to operate and allowed light to enter rooms without the need for curtains. The early windows were made of plain glass However, in the 17th century, sash windows began to become more attractive. They were initially made of colored glazing bars, also known as mullions. These were very expensive at the time but as glass production became more efficient and less expensive, they were a common feature in many of the period homes. In the 19th century, it was possible to create large, strong glass that didn't require supporting bars. This allowed the frame to be enlarged and, in turn, gave the viewer a better view. This was an important improvement. Another significant improvement was the introduction of the double-hung sliding windows at the end of the I920s and beginning of the I930s. This allowed both the lower and upper sash to be opened simultaneously, and also improved the ventilation of buildings. Oak was used for older examples and more prestigious buildings. It is essential to keep the separation bead that separates the sashes. This will prevent rattles and draughts. The idler wheels, sash pulleys and sash rollers also are essential to the functioning of the window. 2. Energy efficiency Sash windows replaced hinged cases as clearer and larger sheets became available. Plate glass was set into rebated timber frames, pinned with glazing sprigs and putty was then sprayed onto the frame's two sides to ensure watertightness. This type of glazing gradually replaced the leaded light bulbs. The introduction of sashes created the need for a larger variety of ironmongery with the most basic fittings being brass pulleys and lead (and later cast iron) weights, sash stops, shutter hinges and knobs as well as a range of fasteners used to keep the sashes in the right place. These were usually decorated with motifs, inscriptions, and engraved patterns to identify the maker. Sash windows can be very energy-efficient with regular maintenance. However, without this maintenance they may become drafty and let in cold air. Paint and putty can cause draughts. This can be fixed by using wood-to-timber repair products that are specifically designed for this purpose. The replacement window industry relies heavily on the belief that older windows are beyond repair and are not able to be maintained economically. However they can be maintained with a little attention. However, repairs to these windows are costly and can cause considerable disruption to the home. To prevent this, many homeowners 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 house in one day, thereby saving time and avoiding the need for various tradesmen to coordinate. These windows can be equipped with energy-saving double-glazing to attain higher energy ratings than the traditional sash window. However these double-glazed units are unable to duplicate the proportions and section of historic timber sashes. 3. Security Traditional windows can be made secure without compromising their appearance. There are many types of ironmongery that can be fitted with sash chains, mortice bolts and locks for sash. These can be installed in such a way that the window can still be opened for ventilation and cleaning. They are generally not noticeable, since they are designed to fit the sash window. They can be used with traditional sash window catch. These should be replaced by more robust versions, such as those with double screws, or sprung levers in order to reduce the chance of being struck by hammers. Sash-window frames are typically made of oak or slow-grown deal. If the glazing bars are still intact and in good condition, they should be kept. If it is possible, the timber cills should be replaced with wood that matches. PVC-U companies usually provide a one-stop shop installation service, removing and replacing windows on an entire house in a day without the need to involve other tradespeople or coordinate visits from different suppliers. 4. Ventilation When sash windows first introduced in the 17th century they allowed a significant amount of light into the buildings. By 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 lighter appearance and windows with more elegance. The introduction of sash windows also necessitated an entirely new range of ironmongery. Early pulleys were constructed out of wood. Later Victorian ones were made of brass or a mixture of wood and lead. There were also various kinds of shutter hinges and knobs. These ironmongery pieces must be kept clean and preserved in order to appreciate their exquisite design. Timber windows require regular maintenance to keep them in good shape. A lack of regular attention could lead to: sashes that no longer slide smoothly. holes in the frame that admit water, which can cause damage and decay. break down of the putty and allow water penetration that could cause decay in the frame and cill. Steel casement windows became popular in the I920s and I930s because they were sturdy and slim, cheap and matched the trend of healthy living. However, research has shown that traditional softwood sash windows can be just as efficient in thermal efficiency as double-glazed PVC-u windows and can be more attractive than the sleek lines of modern casement windows. The industry of replacement windows was able to convince homeowners that their old windows were rotten drafty, noisy and beyond repair. Many old windows made of timber are repairable and can be utilized for a longer period with minor repairs. 5. Maintenance The traditional sash windows need regular maintenance and inspection. If you don't maintain your window's sash, it could lead to the sash cords breaking, and the glazing bars wearing out excessively. It can also cause the paint and putty to deteriorate. The removal of sashes can also result in structural movement within the frame, which can cause the sash to not close properly. The sash could also get stuck in its open position, which allows water and draughts to enter the building. Moisture penetration is the most common cause of damage to windows made of timber. This can be prevented by regular maintenance by thorough painting and eliminating the cause of dampness. window repair specialists www.repairmywindowsanddoors.co.uk can be removed to reveal the soft, rotting wood. The sections that are rotting should be carefully removed and the affected area should be scarfed or glued together by using replacements of the same kind as the timber that remains. This method of repair increases the amount of fabric that was originally used and is one of least invasive ways to treat timber-to-timber rot. A wood condenser made of resin is a viable alternative to traditional process of sanding or staining. The product is brushed on the surface of the wood to protect it and stabilise it. It is particularly useful for the treatment of pulleys and sash cords which can help prevent breakage. It is crucial to restore and not replace any old ironmongery, like the sash latches and stays. These items can be very difficult to replace without damaging the the original design. It is also recommended that the use of modern aluminium fittings such as sash lifts and chain stays is avoided if at all possible since they can cause corrosion and deterioration of timber frames and sashes.