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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 the way they look. However, sash windows can get stuck and be difficult to open or close. This is typically due to moisture that can cause the wood to expand.

Box sash windows were historically operated using chains, cotton cords and lead weights. Modern sash windows come with hidden springs to overcome this issue.

1. Aesthetics

In contrast to PVC-u windows, which are made to modular imperial sizes, timber sash windows can be restored to their original dimensions. This lets the restoration meet the current energy standards while complying with conservation areas regulations. It also gives a window with a far superior appearance than uPVC alternatives.

Sliding windows with sash were initially only used in large structures or public buildings, but this changed as production became less expensive and craftsmen could produce larger frames with more glass. At the close of the 18th century, sash windows were the most popular wooden design in British homes. Since they were easy to open, sash windows let light into rooms without the need for curtains.

The first windows were made of plain glass but by the 17th century sash windows started to become more decorative with coloured glazing bars and moulded mullions. They were costly initially, but as glass production became cheaper and more efficient, they became a common feature in many homes of the period.

By the 19th century it was possible to create large, strong glass that did not need support bars. This allowed the frame size to be increased even more, which in turn gave a better view from the window. This was a significant advancement.

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 is another important improvement that was made at the end of the I920s and at the beginning of the I930s.

The most commonly used type of sash is constructed from slow grown deal (pine) but oak was used in the more expensive buildings as well as in earlier examples. A parting bead separates the two sashes and it is vital that it is maintained in order to avoid rattles and draughts. The sash pulleys, idler wheels and sash rollers are also essential to the functioning of the window.

2. Energy efficiency

Sash windows replaced hinged casements as clearer and larger sheets were made available. They were glazed with plate glass set within rebated timber frames and secured with glazing sprigs and putty on both sides to create a watertight seal. This kind of glazing gradually replaced the leaded light bulbs.

The introduction of sashes created a need for a much greater variety of ironmongery, including the most basic fittings, brass pulleys as well as lead (and later cast iron) weights, sash stops, shutter hinges and knobs as well as a range of fasteners used to keep the sashes in the right place. They were often decorated with motifs, inscriptions and designs that were engraved to identify the maker.

With regular maintenance, sash windows can be extremely energy efficient. If they are not maintained, they can become drafty. Draughts can also be caused by the deterioration of putty and paint. It is possible to fix this issue by using wood-to-timber solutions.

The replacement window Lock repairs industry relies on the perception that traditional windows are rotten and beyond repair, whereas they can be easily maintained with a bit of care. However, these repairs are costly and can cause substantial disruption to the home. Many homeowners choose to replace their windows using PVC-u from a large "one-stop shop" installation company. These can remove and replace all the windows in a home in just one day, eliminating the need to coordinate different tradesmen and making the whole process much more efficient. They are also available with energy-saving double-glazing, which can achieve greater energy efficiency than traditional sash windows. Double-glazed windows aren't able to replicate the proportions or section of sashes from old timber.

3. Security

It is possible to secure traditional windows without compromising on their aesthetics. Many types of ironmongery can be fitted, including sash chains, mortice bolts and locks for sash. They can be fitted to ensure that the window replacement cambridge remains capable of being opened for ventilation or for cleaning. They are usually not noticeable since they are designed to be used in conjunction with sash windows. They can be used alongside traditional sash-window catchers that are required to be replaced with more robust models (such ones with double screws) or spring-loaded levers to minimize the chance of them being opened by hammering.

Sash-window frames are typically constructed from oak or slow-grown deal. If the glazing bars remain in good condition and in good condition, they should be kept. Where it is possible, the cills of the timber should be replaced by wood that matches. Many PVC-U companies offer a one-stop shop installation service. They can take out and replace windows on a complete home in a single day, without the need to involve other tradespeople.

4. Ventilation

Sash windows were introduced in the 17th Century and allowed for a significant 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 rooms. Larger glass panes were also created. The result was a more light appearance and windows that were more elegant.

Sash windows were introduced and required a new range ironmongery. Early pulleys were of wood, whereas later Victorian ones were made from brass or a mixture of wood and lead, and there were a variety of shutter hinges and knobs. These ironmongery elements should always be retained and cleaned down so that the fine quality of their design can be appreciated.

To ensure they remain in good shape, timber windows require regular maintenance. Inattention to maintenance can result in:

Sashes that do not slide smoothly.

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

break down of putty, allowing water penetration that can lead to decay in the frame and cill.

In the I920s and I930s, steel casement windows grew in popularity because they were strong, slim and cheap, and complemented the vogue for healthy living. However, research has revealed that traditional softwood sash windows are just as efficient thermally as double-glazed windows made of PVC-u, and are more attractive than the sleek lines of modern aluminium casement windows cambridge windows.

The industry of replacement windows was able to convince homeowners that their old windows were rotten drafty, noisy and beyond repair. The truth is that a lot of older windows made of wood are in good condition and with minor repairs can easily be serviceable for many years to come.

5. Maintenance

A traditional sash window needs regular maintenance and inspection. Inability to maintain it properly can result in broken sash cords, excessive wear on the glazing bars, and the deterioration of putty and paint. 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. It is also possible for the sash be snagged or fixed in an open position and let water and draughts enter the property.

Moisture penetration is a frequent cause of damage to timber windows. This can be avoided with regular repairs, thorough painting and removing the source of dampness. The paint can be removed to reveal the soft, rotting wood. The sections of timber that are rotten should be carefully cut out, and the affected area should be scarfed or glued together using replacements of the same type as the remaining timber. This method of repair maximises the amount of original fabric that is left and is one of the least invasive methods for treating decay of timber to timber.

The use of a wood consolidant made from resin is another 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 especially beneficial for the treatment of sash and pulley cords, which can stop breakage.

It is crucial that any old ironmongery like sash stays and latches are retained and restored instead of replaced. It can be difficult to replace these items without altering their original design. It is also recommended that the use of modern aluminum fittings, such as chain stays and sash lifts should be avoided if possible as they can cause corrosion and deterioration to frames and sashes made from timber.