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How to Restore Timber Sash Windows in cambridge double glazing

Many homes in Cambridge have sash windows with traditional designs and homeowners are proud of the way they appear. However, sash windows may get stuck and be difficult to open or close. This is usually due to moisture that can cause the wood to swell.

Box sash windows were historically operated using chains, cotton cords and lead weights. 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, which are modular, can be reconstructed to their original size. This lets the restoration meet modern day energy requirements while complying with conservation regulations for the area. It also gives a window with a far superior appearance than uPVC alternatives.

Sliding sash window frames were initially intended for large structures or public buildings. However this changed as production became more affordable and artisans could produce larger frames with larger glass. At the close of the 18th century, sash windows had become the most sought-after wooden windows and doors cambridge style in British homes. Sash windows were easy to operate and let light into rooms without the use of curtains.

The early windows were made of clear glass, but by the 17th Century sash windows started to be more decorative. They began with colored glazing bars or mullions. They were costly at first, but as glass production became less expensive and more efficient, they became a common feature in many historic homes.

In the 19th century, it was possible to manufacture large, sturdy glass that did not require supporting bars. This allowed the frame to be enlarged and, in turn, gave an improved view. This was an important improvement.

The introduction of the double-hung sliding sash is another important improvement that occurred at the end of the I920s and at the beginning of the I930s. This allowed both the lower and upper sash to be opened simultaneously, and gave improved ventilation to buildings.

Oak was used in older examples and more prestigious buildings. A split bead divides the two sashes. It is essential that it is well maintained to prevent rattles and drafts. The sash pulleys, idler wheels and sash rollers are also essential to the functioning of the window.

2. Energy efficiency

As larger and clearer sheets of glass were made available, sash windows began replacing hinged casements. Plate glass was placed in frames made of timber, which were which were pinned with glazing sprigs, and putty was applied to the frame's sides to ensure watertightness. This kind of glazing gradually replaced the leaded light bulbs.

The introduction of sashes created a need for a much greater variety of ironmongery, with the basic fittings being brass pulleys as well as lead (and later cast iron) weights, sash stoppers shutter hinges, knobs and shutters, and a range of fasteners to hold the sashes into the right place. These were often decorated in motifs, inscriptions, and engraved patterns to identify the maker.

With regular maintenance, sash windows can be extremely energy efficient. If they are not maintained, they can become drafty. Putty and paint can also cause draughts. This can be fixed by using wood-to-timber repair products that are specifically designed for this purpose.

The replacement window industry relies heavily on the perception that older windows are beyond repair and therefore cannot be maintained economically. However windows can be easily maintained with a little attention. Repairs can be expensive and cause lots of disruption to the home. To avoid this homeowners, many prefer to replace their windows with PVC-u windows from one the large 'one stop shop' installation companies. They can replace all windows in a home in a single day, saving time and eliminating the need for multiple tradesmen to coordinate. They are also available with 'energy saving' double-glazing, which can achieve higher energy efficiency ratings than those offered by traditional windows made of sash. However double-glazed windows cannot reproduce the proportions and section of traditional timber sashes.

3. Security

Traditional windows can be made more secure without compromising their appearance. Many types of ironmongery can be fitted with sash chains, mortice bolts and sash locks. They can be positioned in a way so that the window is able to be open for ventilation and cleaning. These products are often not noticeable since they are designed to complement sash windows. They can be used with traditional sash window catches. These should be replaced with more robust models like those with double screws, or sprung levers, to minimize the chance of being hit with hammers.

Sash-window supplier cambridge frames are usually made of oak or slow-grown deal. If the glazing bars are intact, they should be retained. If possible, the timber cills should be replaced by timber that is compatible with. Many PVC-U firms offer a one-stop installation service. They can take down and replace windows throughout a house in just one day, without involving other tradespeople.

4. Ventilation

Sash windows were introduced in the 17th century and allowed for a large amount of light to be absorbed into buildings. By the end 18th century, they had been modified so that more light could be let into the rooms. Larger glazing panes were also created. The result was a lighter appearance and windows that were more elegant.

The introduction of sash windows also necessitated an entirely new range of ironmongery. Early pulleys were constructed of wood. Later Victorian ones were made of brass or a combination of wood and leaded. There were also a variety of types of knobs and shutter hinges. The ironmongery components should be retained and cleaned down so that the fine quality of their design can be appreciated.

Timber windows require regular maintenance to keep them in good order. A lack of attention to them regularly could cause:

Sashes that do not slide smoothly.

Holes in the frame which allow water to enter and cause damage and decay.

Water can get into the putty and cause decay to the frame or the cill.

Steel casement windows were popular in the I920s & I930s because they were sturdy and slim, and also because they were cheap and matched the trend towards healthy living. However, research has revealed that traditional softwood sash windows can be just as efficient in thermal efficiency as PVC-u double-glazed windows, and are more attractive than the modern sleek design of casement windows.

The window replacement industry has done a lot to persuade house owners that their traditional windows are rotten, draughty and beyond repair. The truth is that a lot of old timber windows are in good shape and with minor repairs could easily be maintained for years to come.

5. Maintenance

The traditional sash windows need regular maintenance and inspection. Failure to do this can lead to the sash cords breaking, a lot of wear on the glazing bars and degradation of the paint and putty. The removal of sashes can also result in structural movement within the frame, which can cause the sash not to close correctly. The sash may also become stuck in the open position, which allows water and draughts to enter the property.

Damage to windows made of timber is often caused by water infiltration. This can be prevented by thorough painting, regular repairs and elimination of the cause of dampness. Wet rot is easily identified due to the wavy appearance of the existing paint which can be stripped to reveal soft, rotting timber. Any rotten timber sections must be removed and the affected area carefully cut or pieced with replacements made of the same kind of timber as the ones remaining. This method of repair maximizes the amount of fabric that was originally used and is among the most minimally invasive methods of treating the rot that occurs between timber and timber.

The use of a resin-based wood consolidant is an alternative to traditional sanding and staining. This is brushed on the surface of the wood to protect it and strengthen it. It is especially beneficial for treating pulley cords and sash where it can prevent breakage.

It is essential that any historic ironmongery such as sash stay and latches are kept and rehabilitated instead of being replacing them. It is difficult to replace these items without altering their original design. It is also advised that fittings made of aluminum like sashlifts, as well as chainstays, are avoided since they can cause deterioration and corrosion of timber frames and sashes.