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How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge have sash windows with traditional designs and homeowners are proud of how they appear. Sash windows can get stuck and be difficult to open and close. This is typically due to moisture that can cause the wood to expand.

Box sash windows were previously operated by chains or cotton cords, as well as lead weights. Modern windows with sash springs are concealed to eliminate this issue.

1. Aesthetics

Unlike PVC-u windows that are constructed according to the modular imperial size the timber sash windows are able to be restored to their original sizes. This lets the restoration be in line with modern energy requirements while ensuring compliance with conservation regulations for the area. It also provides windows that have a more attractive appearance than uPVC alternatives.

Sliding windows with sash were initially only used in large buildings or public buildings, though this changed as production became cheaper and craftsmen could make larger frames with more glass. At the close of the 18th century, sash windows were the most popular wooden design in British homes. Sash windows were simple to operate and let light into rooms without the use of curtains.

The first windows were made of glass that was plain However, in the 17th century sash windows started to become more ornamental. They started with coloured glazing bars or mullions. These windows were quite expensive at the time but as glass production improved and less expensive, they became a part of many period houses.

By the 19th century it was possible to manufacture large, strong glass repair cambridge that did not require supporting bars. This allowed the frame size to increase further, which gave a better view out of the window seal replacement near me (morphomics.science`s recent blog post). This was a significant advancement.

The introduction of the double glazing repairs-hung sliding sash was another important improvement that was made in the I920s and beginning of the I930s. This allowed both the lower and upper sash to be opened simultaneously, and also improved the ventilation of buildings.

The most commonly used type of sash is made from slow-growing deal (pine) however oak was also used in more expensive buildings as well as in earlier examples. A parting bead is used to separate the two sashes. It is vital that it is well maintained to prevent rattles and drafts. It is also essential that sash pulleys and idler wheels are kept in good working order as they help to operate the window.

2. Energy efficiency

Sash windows were replaced by hinged casements as clearer and larger sheets were made available. They were coated with plate glass that was set within rebated timber frames and pinned in place using glazing sprigs, with putty on both sides to ensure they were watertight. This type of glass gradually replaced the leaded light bulbs.

The introduction of sashes created the need for a larger variety of ironmongery including the most basic fittings, brass pulleys and lead (and later cast iron) weights, sash stops shutter hinges, knobs and shutters as well as a range of fasteners that secured the sashes to their place. These were usually decorated with patterns, inscriptions and engraved patterns to identify the maker.

Sash windows can be extremely energy efficient if they are maintained regularly. If they are not maintained they could become draughty. Draughts can also be caused by the deterioration of paint and putty. This can be remedied by using wood-to-timber repair products that are specifically designed for this purpose.

The market for replacement windows is based heavily on the belief that old windows are beyond repair and are not able to be maintained economically. However they can be maintained with a little attention. However, repairs to these windows can be expensive and involve considerable disruption to the home. To avoid this, many homeowners prefer to replace their windows with PVC-u windows from one of the largest "one stop shop" installation companies. They can take down and replace all windows in an entire house in a single day, avoiding the need to co-ordinate different tradesmen and making the entire process much more efficient. They can also be fitted with 'energy-saving' double-glazing to get greater energy efficiency than those offered by traditional windows with sash. However these double-glazed units are unable to replicate the section and proportions of the sashes made of timber from the past.

3. Security

Traditional windows can be secured without compromising their appearance. Ironmongery, such as sash chain, mortice bolts and sash locks can be put in place. These can be installed so that the window doctor is still able to be opened 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 in conjunction with traditional sash window catch. They are best replaced with more robust models like those that incorporate 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 if it is possible, the timber of the cill should be replaced by the same wood. PVC-u companies often offer a one stop shop installation service, which includes removing and replacing windows across a home in a single day without the need to involve other tradespeople or co-ordinate various visits from different suppliers.

4. Ventilation

When sash windows first introduced in the 17th century they allowed a large amount of light to flood into buildings. At the end of the 18th century they were altered to allow even more light into rooms, and larger glazing panes began to be made. The result was a much lighter appearance, and windows that had a higher level of elegance than they had before.

Sash windows were introduced that required a brand new type of ironmongery. Early pulleys could be made of wood. Later Victorian ones were made of brass or a mix of wood and lead. There were also different kinds of shutter hinges and knobs. Ironmongery elements must be kept and cleaned so that the fine quality of their design can be appreciated.

Timber windows require careful maintenance to keep them in good shape. A lack of regular attention can result in:

Sashes that don't slide effortlessly.

holes in the frame that allow water, which can cause damage and decay.

break down of the putty and allow water penetration that could lead to decay of the frame and cill.

In the I920s and I930s steel casement windows increased in popularity because they were strong slim and affordable and also matched the fashion for healthy living. Research has shown that softwood sash windows are just as efficient as PVC-u windows, and may even be more attractive.

The industry of replacement windows has done a great job convincing homeowners that their old windows were decayed drafty, noisy and beyond repair. Many older timber windows are repairable and can be used for a long time with minor repairs.

5. Maintenance

The 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 wearing out excessively. It could also cause the paint and putty to degrade. The removal of the sashes may also cause structural movement within the frame that causes the sash to become misaligned and in a position that it is not able to close properly. The sash may also become stuck in an open position, which allows the water and drafts to enter the building.

Moisture penetration is a frequent cause of damage to windows made of timber. This can be prevented by thorough painting, periodic repairs and elimination of the cause of dampness. Wet rot is easily identified by the wavy appearance of the paint that can be removed to reveal soft, rotting wood. The rotten timber sections should be carefully removed and the affected area should be snared together or glued together by using replacements of the same type as the remaining timber. This repair method increases the amount of fabric that was originally used and is among the least invasive ways to treat timber-to-timber rot.

The use of a resin-based wood consolidant is an alternative to the traditional method of staining and sanding. This is brushed on the surface of the wood to protect it and strengthen it. It is particularly beneficial in the treatment of sash cords and pulleys which can help stop breakage.

It is essential to preserve and not replace any historic ironmongery, like sash latches and stays. These items can be very difficult to replace without harming the quality of the original design. It is also recommended that the use of modern aluminum fittings such as sash lifts and chain stays is avoided if at all feasible as they could cause corrosion and damage to frames and sashes made of timber.