How to Restore Timber Sash Windows in Cambridge Many homes in Cambridge have traditional sash windows and the homeowners are proud of their appearance. However, sash windows can become stuck and difficult to open or close. This is usually due to moisture which can cause the timber to swell. Box sash windows were traditionally operated by chains or cotton cords, as well as lead weights. Modern sash window springs are hidden to eliminate this issue. 1. Aesthetics Contrary to PVC-u windows which are manufactured to modular imperial sizes, timber sash windows can be restored to their original size. This permits the re-installation of timber sash windows to comply with current energy standards and to comply with conservation area regulations. It also offers windows that have a more attractive appearance than uPVC alternatives. Sliding sash window frames were initially intended for large structures or public buildings. However the production became cheaper and artisans could produce larger frames with more glass. By the end of the 18th century, sash windows had become the most popular wooden style in British homes. As they were easy to open sash windows allowed light into rooms without the need for curtains. The early windows were made of clear glass However, by the 17th Century sash windows started to become more ornamental. They were initially made of colored glazing bars, also known as mullions. These windows were quite expensive at the time but as glass production became more efficient and cost-effective, they were a common feature in numerous period houses. In the 19th century, it became possible to produce large, sturdy glasses that didn't require supporting bars. This allowed for the frame to be made larger, which in turn gave a better view. This was an important innovation. Another important improvement was the introduction of the double-hung sliding windows at the end of the I920s and beginning of I930s. The double-hung sliding sash was another important improvement that was made 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 utilized in more expensive buildings as well as in earlier examples. It is essential to keep the parting bead which separates the sashes. This will prevent draughts and rattles. The sash pulleys, idler wheels and sash rollers are also vital for the proper operation of the window. 2. Energy efficiency As clearer and larger sheets of glass became available, sash windows started replacing hinged casements. They were made of plate glass, set within rebated timber frames and pinned in place using glazing sprigs and putty on both sides to ensure they were watertight. This type of glass gradually replaced leaded lights. The introduction of sashes led to 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 used to keep the sashes into the right place. These were usually decorated with motifs, inscriptions, and engravings to identify the maker. Sash windows are energy-efficient with regular maintenance. However, without this maintenance they can become draughty and let in cold air. Draughts can also result from the degeneration of putty and paint. This can be corrected making use of wood-to-timber repair tools that are proprietary. The industry of replacement windows is based on the perception that older windows are old and beyond repair, while they can be maintained with a bit of care. These repairs can be costly and cause a lot of disruption in the home. Many homeowners choose to replace their windows with PVC-u from a huge one-stop shop installation company. They can take down and replace all windows in a house within a single day, eliminating the need to coordinate different tradesmen, making the whole process much more efficient. These windows can be fitted with 'energy-saving double glazing to get higher energy ratings than traditional windows with sash. However double-glazed windows cannot duplicate the proportions and section of traditional timber sashes. 3. Security Traditional windows can be secured without compromising their style. A variety of ironmongery types can be installed including 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. These products are often discrete since they are made to work with sash windows. They can be used in conjunction with traditional sash window catches. These should be replaced by more robust models, such as those with double screws or spring levers to decrease the risk of being hit with hammers. Sash-window frames are traditionally made of oak or slow-grown deal. If glazing bars have survived, they should be kept and where possible, the timber of the cill should be replaced by identical wood. PVC-U companies usually offer a one stop shop installation service, which includes removing and replacing windows on an entire home in one 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 substantial amount of light to flood into the buildings. In the 18th century, they were adapted so that even more light could be let into rooms. Larger glass panes were also produced. The result was a more light appearance and windows with more elegance. Sash windows were introduced, which required a new type of ironmongery. Early pulleys were of wood, later Victorian ones were made from brass or a combination of lead and wood and there were a variety of shutter hinges and knobs. The ironmongery components should be maintained and cleaned so that the fine quality of their design can be appreciated. Timber windows require regular maintenance to ensure they remain in good order. door fitters cambridge of attention to them regularly could lead to: sashes that no longer slide smoothly. Holes in the frame that allow water to get in and cause decay and damage. break down of putty, allowing water to penetrate, which could cause decay in the frame and cill. In the I920s and I930s, steel casement windows gained popularity due to their durability slim and affordable and were in line with the trend for healthy living. However, research has revealed that traditional softwood sash windows can be just as thermally efficient as PVC-u double-glazed windows, and are more attractive than the modern sleek design of casement windows. The window replacement industry did a lot to convince homeowners that their old windows were rotten and drafty. They were also beyond the budget for repair. Many old timber windows can be fixed and used for many more years with minor repairs. 5. Maintenance Traditional sash windows require 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 deteriorating excessively. It could also cause the paint and putty to become damaged. The removal of sashes may also cause structural movement within the frame which causes the sash to move out of alignment and unable to close correctly. It is also possible for the sash to be stuck or slammed into an open position, which can let water and draughts enter the structure. Damage to windows made of timber is often caused by moisture penetration. This can be avoided with regular repairs by thorough painting and eliminating the source of dampness. Wet rot is easily identified by the wavy look of the existing paint which can be stripped to reveal soft, rotting wood. The sections of timber that are rotten should be carefully removed and the affected part should be snared together or glued together using replacements of the same type as the remaining timber. This method of repair maximizes the amount of fabric that was originally used and is among the most non-invasive methods to treat wood-to-timber rot. The use of a wood consolidant made from resin is another alternative to traditional sanding and staining. This is brushed onto the surface of the timber to stabilize it and protect it from further damage. It is particularly beneficial for the treatment of pulleys and sash cords which help prevent breakage. It is crucial to restore and not replace any old ironmongery, such as sash latches and stays. It can be difficult to replace these items without altering their original design. It is also advised that fittings made of aluminum like sashlifts and chainstays, be avoided as they can cause corrosion and deterioration of timber frames and sashes.
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