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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 look. Sash windows can get stuck and be difficult to open and close. This is usually due to moisture which can cause the timber to expand. Box sash windows were previously operated by chains, cotton cords and lead weights. Modern sash windows come with hidden springs to overcome this issue. 1. Aesthetics Timber sash windows, unlike PVC-u windows that are made in imperial sizes that are modular, are able to be restored to their original size. This lets the restoration meet the current energy standards while ensuring compliance with conservation regulations for the area. It also offers windows with a superior appearance than uPVC alternatives. Sliding sash window frames were initially only used for large buildings or public buildings. However the production became less expensive and craftsmen could create larger frames using larger glass. At the close of the 18th century, sash windows had become the most popular wooden design in British homes. Sash windows were easy to operate and allowed light to enter rooms without the use of curtains. Early windows were 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. By the 19th century it was possible to manufacture large, strong glass that didn't require supporting bars. This allowed the frame size to be enlarged further and this in turn allowed for a wider view from the window. This was an important innovation. Another important improvement was the introduction of the double-hung sliding windows at the end of I920s and at the beginning of I930s. This allowed both the lower and upper sash to be opened simultaneously and also improved the ventilation of the building. Oak was used in older examples and for more prestigious buildings. A split bead divides the two sashes. It is essential that it is maintained to prevent rattles and draughts. The sash pulleys, idler wheels and sash rollers also are essential to the functioning of the window. 2. Energy efficiency As larger and clearer sheets of glass became available, sash window began replacing hinged casements. Glass plates were set in rebated timber frames, pinned with glazing sprigs and putty was applied to the frame's sides to ensure watertightness. This type of glass gradually replaced the leaded light bulbs. The introduction of sashes resulted in the need for a greater variety of ironmongery, with the most basic fittings being brass pulleys, lead (and later cast iron) weights, sash stoppers shutter hinges, knobs and shutters, and a range of fasteners used to keep the sashes to their place. They were often decorated with motifs, inscriptions or designs that were engraved to identify the maker. With regular maintenance, sash windows can be very energy efficient. But, if you don't maintain them, they can become drafty and let in cold air. Paint and putty may also cause draughts. This can be remedied by using wood-to-timber repair products that are specifically designed for this purpose. The replacement window industry relies heavily on the perception that old windows are beyond repair and cannot be maintained economically. However they can be maintained with a little attention. These repairs can be expensive and cause a lot of disruption in the home. To prevent this homeowners, many prefer to replace their windows with PVC-u windows from one of the many “one stop shop” installation companies. They can replace all windows in a home in one day, thereby saving time and eliminating the need for multiple tradesmen to coordinate. These windows can be equipped with energy-saving double glazing to get higher energy ratings than traditional windows made of sash. However double-glazed windows cannot replicate the section and proportions of traditional timber sashes. 3. Security Traditional windows can be made secure without compromising their aesthetics. Ironmongery like sash chain, mortice bolts, and sash lock can be put in place. They can be fitted so that the window is still capable of being opened to allow ventilation or for cleaning. These products are usually not noticeable, since they are designed to complement the sash window. They can be used in conjunction with traditional sash window catch. These are best replaced with more robust versions, such as ones that have double screws, or sprung levers, to minimize 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 remain in good condition and are not damaged, they should be left. If it is possible, the cills of the timber should be replaced with timber that is compatible with. PVC-u companies typically offer a one stop shop installation service, removing and replacing windows on an entire home in a single day without the need to involve 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 significant amount of light to flood into the buildings. At the end of the 18th century, they were modified to allow more light could be let into rooms. Larger glazing panes were also produced. The result was a lighter appearance and windows with more elegance. emergency upvc door repairs repairmywindowsanddoors of sash windows also demanded an entirely new range of ironmongery. Early pulleys were constructed from wood. Later Victorian ones were made of brass or a combination of wood and lead. There were also various types of shutter hinges and knobs. Ironmongery elements must be kept and cleaned so that the quality of their design can be appreciated. To ensure they remain in good condition, timber windows must be maintained. Inattention to maintenance could lead to: Sashes that do not move easily. holes in the frame allow water causing damage and decay. Water can penetrate the putty and cause decay to the frame or cause cill. In the I920s and I930s, steel casement windows gained popularity due to their strength slim and inexpensive and were in line with the trend for healthy living. Research has shown that softwood sash windows are as efficient as PVC-u windows, and may even be more attractive. The replacement window industry has made a significant effort to convince homeowners that their old windows are rotten, draughty and beyond economic 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. Inability to keep up with this can lead to sash cords breaking, excessive wear on the glazing bars, and the deterioration of putty and paint. The removal of the sashes can also result in structural movement within the frame that causes the sash to move out of alignment and not closing properly. It is also possible for the sash be snagged or fixed in the open position and this can let water and draughts enter the property. Damage to windows made of timber is often caused by water penetration. This can be avoided by thorough painting, regular repairs, and removing the source of dampness. The paint can be removed to reveal the soft, decaying wood. Any timber that is rotting must be removed and the affected part carefully cut or pieced with replacements made of the same type of timber as the ones that remain. This method of repair increases the amount of original fabric that is left and is one of the least invasive methods of treating decay of timber to timber. The use of a wood consolidant made from resin is another alternative to traditional sanding and staining. It is brushed onto the surface of the wood to protect it and strengthen it. It is particularly useful for treating pulley cords and sash, which can help prevent breakage. It is important to restore and not replace any old ironmongery, such as the sash latches and stays. It can be difficult to replace these items without compromising their original design. It is also advised that modern aluminium fittings, such as sashlifts and chainstays, should be avoided since they can cause deterioration and corrosion of timber frames and sashes.