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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 how they look. Sash windows can get stuck and are difficult to open and close. This is usually due to moisture, which can cause the timber to swell. Box sash windows were previously operated with chains, cotton cords and lead weights. Modern sash windows feature hidden springs to overcome this issue. 1. Aesthetics Contrary to PVC-u windows which are constructed to modular imperial sizes Timber sash windows can be restored to their original size. This allows the restoration to meet the current energy standards while still complying with conservation area regulations. It also offers windows that are superior to the uPVC alternatives. Sliding frames for windows made of sash were originally only used for large buildings or public buildings. However this changed as production became less expensive and craftsmen could make larger frames using more glass. By the end of the 18th century, sash windows were the most popular wooden design in British homes. Sash windows were easy to operate and let light in rooms without the need for curtains. The early windows were made of plain glass, but by the 17th Century the sash windows began to become more attractive. They began with colored glazing bars, also known as mullions. They were expensive at the beginning but as glass production became less expensive and more efficient, they were an integral feature in many period houses. In the 19th century, it became possible to create large, strong glasses that didn't need support bars. This allowed for the frame to be made larger, which in turn gave the viewer a better view. This was a very important improvement. The introduction of the double-hung sliding sash was a important improvement that occurred at the end of the 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 made from slow grown deal (pine) but oak was also used in more luxurious buildings and in some earlier examples. It is crucial to maintain the parting bead which separates the sashes. This will help prevent rattles and draughts. The idler wheels, sash pulleys and sash rollers are also crucial to the operation of the window. 2. Energy efficiency As larger and clearer sheets of glass became available, sash windows began to replace hinged casements. They were coated with plate glass that was set within rebated timber frames and then pinned with glazing sprigs, and then putty on both sides to create a watertight seal. This type of glazing gradually replaced the use of leaded lights. Sashes were introduced, which resulted in increased demand for ironmongery. The basic fittings included brass pulleys (and later cast-iron) weights, sash stoppers, shutter hinges and handles, and various fasteners used to secure the sashes. These were usually decorated with patterns, inscriptions and patterns engraved to identify the maker. With regular maintenance, sash windows can be extremely energy efficient. Without this maintenance they can get drafty. Draughts can also be caused by the deterioration of paint and putty. This issue can be fixed by using wood-to-timber solutions. The replacement window industry relies heavily on the notion that old windows are beyond repair and cannot be maintained economically. However they can be maintained with a bit of attention. These repairs can be costly and cause lots of disruption to the home. To prevent this homeowners often choose to replace their windows with PVC-u windows from one of the largest “one-stop shop” installation companies. They can replace all windows in a house in one day, thereby saving time and avoiding the need for different tradesmen to coordinate. These windows can be fitted with 'energy-saving double glazing to get more energy efficient ratings than a traditional sash window. However sash window repair cambridge -glazed windows cannot duplicate the proportions and section of historic timber sashes. 3. Security It is possible to secure traditional windows without compromising their appearance. Ironmongery like mortice bolts, sash chain and sash locks can be used. They can be fitted in a way that the window is open to allow ventilation or cleaning. These windows are typically unobtrusive as they are designed to be used in conjunction with sash windows. They can be used alongside traditional sash window catches and should be replaced with more robust models (such as those incorporating double screws) or sprung levers to reduce the possibility of them being hammered open. Sash-window frames were constructed from slow grown 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 possible, the timber cills should be replaced with timber that is compatible with. Many PVC-u firms offer a one-stop installation service. They can remove and replace windows on an entire home in a single day, without the need to involve other tradespeople. 4. Ventilation Sash windows were introduced in the 17th century and allowed for a significant amount of light to be absorbed into 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 look and windows with more elegance. The introduction of sash windows also demanded the creation of a new line of ironmongery. Early pulleys were made 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. The ironmongery pieces need to be cleaned and preserved to appreciate their exquisite design. To ensure they remain in good condition, timber windows require regular maintenance. A lack of regular attention could lead to: Sashes that do not slide smoothly. Holes in the frame that allow water to get in and cause damage and decay. Water can penetrate the putty and cause decay to the frame or cill. Steel casement windows gained popularity in the I920s and I930s because they were strong and slim, and also because they were cheap and complemented the trend for healthy living. However, research has revealed that traditional softwood sash windows are as efficient thermally as PVC-u double-glazed windows, and are more attractive than the sleek lines of contemporary casement windows. The window replacement industry has made a significant effort to convince homeowners that their old windows are dirty, noisy and beyond economic repair. The reality is that many older windows made of wood are in good condition and with minor repairs could easily be maintained for years to be. 5. Maintenance Traditional sash windows require regular maintenance and inspection. If you do not maintain your sash window, it can cause the sash cords breaking, and the glazing bars deteriorating excessively. It could also cause paint and putty deteriorate. The removal of sashes could also result in structural movement within the frame, causing the sash not to close properly. The sash may also become stuck in the open position, allowing water and draughts into the property. Damage to timber windows is often caused by water infiltration. This can be avoided by thorough painting, periodic repairs and the elimination of the source of dampness. The paint can be removed to expose the soft, rotting wood. Any rotten timber sections should be cut off and the affected area carefully wrapped or pieced back using replacements made from the same type of wood as those remaining. This method of repair increases the amount of original fabric that is left and is one of the least invasive ways of treating decay of timber to timber. A resin-based wood condenser is a viable alternative to traditional process of sanding or staining. The product is brushed on to the surface of the wood to stabilise and shield it from further damage. It is particularly beneficial in the treatment of sash cords and pulleys where it can help to prevent the breakage. It is important that any old ironmongery like sash stays and latches are retained and restored instead of replaced. It can be difficult to replace these items without altering their original design. It is also recommended that fittings made of aluminum, such as sashlifts and chainstays, be avoided as they can cause corrosion and deterioration of timber frames and sashes.