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How to Restore Timber Sash Windows in Cambridge Many 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 often due moisture that can cause the timber to swell. Box sash windows were historically operated by chains, cotton cords and weights made of lead. Modern window springs for sash windows are concealed to solve this problem. 1. Aesthetics Timber sash windows, in contrast to PVC-u windows, which are made in imperial sizes and are modular, are able to be restored to their original size. This allows the restoration to meet modern day energy requirements while ensuring compliance with conservation regulations for the area. It also provides windows with a superior appearance than the uPVC alternatives. Sliding windows with sash were initially only used in large structures or public buildings, however the production process was less expensive and craftsmen were able to produce larger frames with more glass. At the end of the 18th century, sash windows had become the most popular wooden design in British homes. Since they were easy to open sash windows allowed light into rooms without curtains. The early windows were made of plain glass However, by the 17th Century the sash windows began to become more attractive. They began with colored glazing bars or mullions. These were very expensive at the time but as glass production became more efficient and cheaper they were a common feature in numerous period houses. In the 19th century, it was possible to create large, strong glasses that did not require supporting bars. This allowed the frame's size to be enlarged more, which in turn allowed for a wider view from the window. This was a very important advancement. The introduction of the double-hung sliding sash was another significant improvement that came about at the end of the I920s and beginning of the I930s. This allowed both the lower and upper sash to be opened simultaneously, and allowed for better ventilation to buildings. The most common kind of sash is made of slow-growing deal (pine) however oak was also used in more prestigious buildings and in some earlier examples. A split bead divides the two sashes and it is essential that it is well maintained to prevent rattles and drafts. The idler wheels, sash pulleys and sash rollers also are crucial to the functioning of the window. 2. Energy efficiency Sash windows were replaced by hinged casements as larger and clearer sheets became available. Plate glass was placed in frames of timber that were rebated, then pinned with glazing sprigs and putty was sprayed on the frame's two sides for watertightness. This type of glass gradually replaced led lights. Sashes were introduced, which led to an increase in demand for ironmongery. The most basic fittings were brass pulleys (and later cast-iron) weights and stoppers for sashes, shutter hinges and handles, and a variety of fasteners to secure the sashes. They were often decorated with motifs, inscriptions or engravings that identified the maker. With regular maintenance, sash windows are extremely energy efficient. Without this maintenance they can get draughty. Paint and putty can cause draughts. You can fix this problem by using wood-to-timber products. The market for replacement windows rests on the belief that traditional windows are rotten and beyond economical repair, but they can be maintained with a bit of care. Repairs can be expensive and cause many disruptions in the home. Many homeowners choose to replace their windows with PVC-u from a “one-stop shop” company for installation. They can replace all windows in a home in one day, thereby saving time and avoiding the need for different tradesmen to coordinate. These windows can be equipped with energy-saving double glazing to get higher energy ratings than traditional windows made of sash. These double-glazed units are not capable of replicating the proportions or section of historic timber sashes. 3. Security It is possible to secure traditional windows without compromising on their aesthetics. A variety of ironmongery types can be installed, including sash chains, mortice bolts and locks for sash. They can be fitted in such a way that the window can still be opened for ventilation and cleaning. They are usually not noticeable since they are designed to be used in conjunction with sash windows. They can be used alongside traditional sash-window catches that must be replaced by more robust models (such ones that have double screws) or spring levers to decrease the risk of them being opened by hammering. Sash-window frames are usually made of oak or slow-grown deal. When glazing bars have survived they should be preserved, and where possible, the timber of the cill should be replaced with matching wood. PVC-U companies usually offer a one stop shop installation service, removing and replacing windows on an entire home in a single day without the need to engage other tradespeople, or coordinate visits from different suppliers. 4. Ventilation When sash windows were first introduced in the 17th century they allowed a large amount of light into buildings. In the 18th century, they had been modified so that more light could be let into rooms. Larger glazing panes were also made. The result was a lighter look and windows with more elegance. Sash windows were introduced, which required a new type of ironmongery. Early pulleys were constructed out of wood. Later Victorian ones were made of brass or a mixture of wood and leaded. There were also different types of knobs and shutter hinges. These ironmongery pieces must be cleaned and preserved to appreciate their fine design. To ensure they remain in good shape, timber windows require regular maintenance. Inattention to maintenance routinely could cause: Sashes that no longer slide easily. holes in the frame allow water that can cause decay and damage. Water can get into the putty and cause decay to the frame or cill. Steel casement windows gained popularity in the I920s & I930s because they were strong and slim, cheap and complemented the trend for healthy living. However, research has revealed that traditional softwood sash windows are as thermally efficient as double-glazed windows made of PVC-u, and can be more attractive than the modern sleek design of casement windows. The replacement window industry has made a significant effort to persuade house owners that their traditional windows are old, dirty, and beyond economic repair. However, many older windows made of timber are in good condition and, with minor repairs, could easily be repaired for many years to come. 5. Maintenance The traditional sash windows need regular maintenance and inspection. If you fail to maintain your sash window, it can lead to the sash cords breaking and the glazing bars deteriorating excessively. It can also cause the paint and putty to 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. It is also possible for the sash to be snagged or slammed into an open position and let water and draughts into the structure. Moisture penetration is a common cause of damage to windows made of timber. This can be prevented by careful painting, regular repairs, and removing the source of dampness. Wet rot can be identified due to the wavy appearance of the existing paint which can be stripped away to reveal soft, rotting wood. The sections of timber that are rotten must be removed with care and the affected area should be snared together or glued together by using replacements of the same type as the remaining timber. This method of repair increases the amount of fabric that is left and is among the least invasive methods of treating timber-to-timber decay. A resin-based wood condenser is an alternative to traditional staining or sanding. This is brushed on the surface of the wood to protect it and stabilise it. It is especially useful for treating sash and pulley cords, which can stop breakage. It is essential that any historic ironmongery such as sash stay and latches are kept and restored instead of replacing them. upvc window and door repairs repairmywindowsanddoors can be extremely difficult to replace without harming the quality of the original design. It is recommended that the use of modern aluminium fittings, such as chain stays and sash lifts should be avoided if possible as they can cause corrosion and damage to frames and sashes made of timber.