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15 Reasons Why You Shouldn't Ignore Sash Windows Cambridge
How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge have sash windows that are traditional and the homeowners are proud of their appearance. Sash windows can become stuck and become difficult to open or shut. This is usually due to moisture that can cause the wood to expand.

Box sash windows were previously operated with chains, cotton cords and weights made of lead. Modern sash windows come with hidden springs to solve this issue.

1. Aesthetics

Timber sash windows, unlike PVC-u windows that are made in imperial sizes, which are modular, can be reconstructed to original dimensions. This allows the restoration to be in line with modern energy requirements while complying with conservation regulations for the area. It also provides windows that are superior to the uPVC options.

Sliding sash windows were originally only used in large buildings or public buildings, though this changed as production became less expensive and craftsmen could produce larger frames with more glass. In the 18th century, Sash windows were the most popular design of wood in the majority of British properties. Since they were easy to open sash windows allowed light into rooms without the need for curtains.

The early windows were made of plain glass however, in the 17th century the sash windows began to be more decorative. They started with coloured glazing bars, also known as mullions. These were very expensive at the time, but as glass production became more efficient and cheaper they were a common feature in numerous period houses.

In the 19th century, it was possible to create large, sturdy glasses that didn't require supporting bars. This allowed the frame's size to be enlarged further and this in turn allowed for a wider view from the window. This was a significant innovation.

Another significant improvement was the introduction of the double-hung sliding window at the end of the I920s and beginning of the I930s. This allowed both the lower and upper sash to be opened simultaneously and allowed for better ventilation to buildings.

The most commonly used type of sash is constructed of slow-growing deal (pine) however oak was used in the more expensive buildings as well as in some earlier examples. A split bead divides the two sashes. It is essential that it is maintained in order to avoid 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 were made available, sash windows began to replace hinged casements. They were glazed with plate glass set within rebated timber frames and pinned in place using glazing sprigs and putty on both sides to make them watertight. This form of glazing gradually superseded the leaded light bulbs.

Sashes were introduced, which resulted in increased demand for ironmongery. The most common fittings included brass pulleys (and later cast-iron) weights as well as sash stoppers shutter hinges and handles and a variety of fasteners to secure the sashes. They were often decorated with designs, inscriptions, and engraved patterns to identify the maker.

Sash windows can be very energy efficient when they are maintained regularly. But, if you don't maintain them, they can become draughty and let in cold air. Draughts can also be caused by the breakdown of putty and paint. It is possible to fix this issue by using wood-to-timber products.

The replacement window industry relies heavily on the notion that old windows are beyond repair and therefore cannot be maintained economically. However, they can easily be maintained with a little attention. Repairs can be expensive and cause many disruptions in the home. To prevent this homeowners often prefer to replace their windows with PVC-u windows made by one of the largest "one stop shop" installation companies. They can replace all windows in a house in a single day, saving time and avoiding the need for multiple tradesmen to coordinate. They can also be fitted with 'energy saving' double-glazing to get more energy efficient ratings than are possible with traditional sash windows. However these double-glazed units are unable to replicate the section and proportions of traditional timber sashes.

3. Security

It is possible to secure traditional windows without compromising their style. Ironmongery, such as mortice bolts, sash chain and sash locks can be used. These can be installed to ensure that the window is still able to be opened for ventilation or cleaning. They are usually not noticeable since they are designed to complement sash windows. They can be used with traditional sash window catch. They should be replaced by more robust models like those that incorporate double screws or spring levers, to minimize the chance of being hit with hammers.

Sash-window frames were typically constructed from slow grown deal or, in the more elegant homes they were made from oak. If the glazing bars are intact and in good condition, they should be kept. If it is possible, the cills of the timber should be replaced with timber that is compatible with. Many PVC-u firms offer a one-stop installation service. They can take down and replace windows on a complete home in a single day, without involving any other tradespeople.

4. cambridge double glazing were introduced in the 17th century and allowed for a large amount of light to be absorbed into buildings. By the end of the 18th century, they were adapted to allow even more light into rooms, and bigger glazing panes started to be manufactured. The result was a lighter appearance and windows with a greater quality of design than before.

The introduction of sash windows also required the creation of a new line of ironmongery. Early pulleys could be made from wood. Later Victorian ones were made of brass or a mixture of wood and lead. There were also different kinds of shutter hinges and knobs. These ironmongery pieces must be maintained and cleaned to appreciate their beautiful design.

Timber windows require regular maintenance to keep them in good shape. Lack of regular attention may lead to:

Sashes that do not slide smoothly.

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

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

Steel casement windows were popular in the I920s and I930s because they were strong and slim, and also because they were cheap and matched the trend towards healthy living. Research has proven that softwood sash window are just as efficient as PVC-u windows and can even be more attractive.

The replacement window industry has done a lot to convince homeowners that their old windows are dirty, noisy and beyond economic repair. However, many older windows made of timber are in good shape and with minor repairs could easily be maintained for years to be.

5. Maintenance

A traditional sash window requires regular maintenance and inspection. Inability to keep up with this can result in broken sash cords, excessive wear on the glazing bars and deterioration of paint and putty. The removal of sashes may also result in structural movement within the frame, which can cause the sash to not close properly. The sash can also be stuck in an open position, which allows water and draughts into the property.

Moisture penetration is a frequent cause of damage to timber windows. This can be prevented by regular maintenance, thorough painting and removing the source of dampness. The paint can be removed to reveal the soft, decaying wood. The sections that are rotting must be removed with care and the affected area 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 original fabric that is left and is among the least invasive methods for treating decay of timber to timber.

The use of a wood consolidant made from resin is an alternative to the traditional method of staining and sanding. The product is brushed on the surface of the wood to protect it and strengthen it. It is particularly useful in the treatment of pulleys and sash cords where it can help to stop breakage.

It is important to restore and not replace any old ironmongery, like the sash latches and stays. It is difficult to replace these items without altering their original design. It is also advised that modern aluminium fittings like sashlifts and chainstays, are avoided since they can cause deterioration and corrosion of timber frames and sashes.

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