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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 the way they appear. Sash windows can become stuck and are difficult to open and close. This is typically due to moisture that can cause the wood to swell. Box sash windows were historically operated using chains or cotton cords, as well as weights made of lead. Modern windows with sash springs are concealed to solve this problem. 1. Aesthetics Contrary to PVC-u windows which are manufactured according to imperial sizes that are modular the timber sash windows are able to be restored to their original sizes. This allows the restoration to meet modern day energy requirements while still complying with conservation area regulations. It also provides a window that is far superior to uPVC options. Sliding windows with sash were initially only used in large structures or public buildings, however this changed when production became cheaper and craftsmen could produce larger frames with more glass. By the end of the 18th century, sash windows had become the most popular wooden design in British homes. Sash windows were simple to operate and let light in rooms without the use of curtains. The first windows were made of glass that was plain, but in the 17th century the sash windows began to become more ornamental. They were initially made of colored glazing bars or mullions. They were expensive at first, but as glass production became less expensive and more efficient, they were a common feature in many period houses. In the 19th century, it became possible to produce large, strong glasses that didn't require supporting bars. This allowed the frame to be made bigger and, in turn, gave the viewer a better view. This was a significant innovation. Another important improvement was the introduction of the double-hung sliding window at the end of I920s and at the beginning of I930s. The double-hung sliding sash is another important improvement that came into existence at the end of the I920s and beginning of the I930s. The most commonly used kind of sash is made of slow-growing deal (pine) however oak was utilized in more luxurious buildings and in earlier examples. A split bead divides the two sashes and it is important that this is maintained to prevent rattles and drafts. It is also important that the idler and sash pulley wheels are kept in good working order as they help to operate the window. 2. Energy efficiency Sash windows replaced hinged casements as larger and clearer sheets became available. Plate glass was set into frames of timber that were rebated, then secured with glazing sprigs and putty was applied to the frame's two sides to ensure watertightness. This kind of glazing gradually replaced the leaded light bulbs. The introduction of sashes created a need for a much larger variety of ironmongery with the most basic fittings being brass pulleys and lead (and later cast iron) weights, sash stops shutter hinges, knobs and shutters, and a range of fasteners to hold the sashes in place. These were usually decorated with motifs, inscriptions, and engraved patterns to identify the maker. With regular maintenance, sash windows are extremely energy efficient. However, without this maintenance they may become drafty and let in cold air. Putty and paint can 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 belief that old windows are damaged beyond repair and therefore cannot be maintained economically. However, they can easily be maintained with a little attention. However, these repairs can be costly and cause considerable disruption to the home. Many homeowners choose to replace their windows with PVC-u from a “one-stop shop” installation company. They can take down and replace all windows in a home within a single day, avoiding the need to coordinate multiple tradesmen, making the whole process much quicker. They can also be fitted with 'energy saving' double-glazing to get greater energy efficiency than are possible with traditional sash windows. However double-glazed windows cannot replicate the section and proportions of the sashes made of timber from the past. 3. Security Traditional windows can be made more secure without compromising their style. Many types of ironmongery can be fitted, including sash chains, mortice bolts and locks for sash. These can be put in place so that the window is able to be opened for ventilation or cleaning. These windows are typically not noticeable since they are designed to work with sash windows. They can be used in conjunction with traditional sash window catches. They should be replaced with more robust versions, such as those that incorporate double screws or sprung levers, to minimize the chance of being struck by hammers. Sash-window frames were traditionally made from slow-growing deal or, in the more luxurious homes made of oak. If the glazing bars are still intact and in good condition, they should be kept. If wooden windows and doors cambridge is it is possible, the cills of the timber should be replaced with timber that is compatible with. Many PVC-U firms provide a one-stop shop installation service. They can take out and replace windows on a complete home in a single day, without involving other tradespeople. 4. Ventilation Sash windows were introduced in the 17th century and allowed for a large amount of light to enter buildings. By the end 18th century, they had been adapted so that even more light could be let into rooms. Larger glazing panes were also made. The result was a lighter appearance and windows with more elegance. Sash windows were introduced, which required a new type of ironmongery. Early pulleys were of wood, while later Victorian ones were made of brass or a mixture of lead and wood and there were a variety of shutter hinges and knobs. These ironmongery pieces must be cleaned and preserved to appreciate their beautiful design. To keep them in good condition, wooden windows must be maintained. Lack of regular attention may cause: Sashes that do not move smoothly. holes in the frame that allow water that can cause decay and damage. break down of putty, allowing water to penetrate, which can lead to decay in the frame and cill. In the I920s and the I930s steel casement windows grew in popularity due to their strength slim and inexpensive and were in line with the trend for healthy living. However, research has proven that traditional softwood sash windows can be just as efficient thermally as PVC-u double-glazed windows, and can be more attractive than the sleek lines of contemporary casement windows. The replacement window industry has made a significant effort to convince homeowners that their windows are dirty, noisy and beyond repair. The truth is that a lot of old windows made of wood are in good condition and with minor repairs could easily be serviceable for many years to come. 5. Maintenance Traditional sash windows require regular maintenance and inspection. If you fail to maintain your window's sash, it could cause the sash cords breaking and the glazing bars deteriorating excessively. It could also cause the paint and putty to degrade. The removal of the sashes could also result in structural movement within the frame that causes the sash to move out of alignment and not closing properly. The sash could also get stuck in an open position, allowing water and draughts into the building. The damage to timber windows is often caused by water infiltration. This can be avoided by regular repairs, thorough painting and removing the source of dampness. Wet rot can be identified due to the wavy appearance of the existing paint which can be stripped to reveal rotting, soft timber. The rotten timber sections should be carefully cut out and the affected part should be scarfed or glued together by using replacements of the same nature as the rest of the timber. This repair method increases the amount of fabric used in the first place and is one of most minimally invasive methods of treating wood-to-timber rot. The use of a wood consolidant made from resin is a different option to the traditional method of sanding and staining. The product is brushed on the surface of the wood to protect it and stabilise it. It is particularly beneficial in the treatment of pulleys and sash cords where it can help to stop breakage. It is crucial that any ironmongery from the past such as sash stays and latches are retained and restored rather than replaced. They can be extremely difficult to replace without compromising the quality of the original design. It is also advised that modern fittings made of aluminium, such as sashlifts and chainstays, should be avoided since they can cause deterioration and corrosion of timber frames and sashes.