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How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge have traditional sash windows and homeowners are proud of how they look. Sash windows can get stuck and be difficult to open and close. This is usually due moisture, which can cause the wood to expand.

Traditionally, box sash windows used chains or cotton cord and lead weights to operate. Modern sash window springs are hidden to eliminate this issue.

1. Aesthetics

Contrary to PVC-u windows which are constructed according to the modular imperial size the timber sash windows are able to be restored to their original size. This permits the re-installation of timber sash windows to meet current energy requirements and comply with conservation area regulations. It also provides windows with a superior appearance than the uPVC alternatives.

Sliding sash windows were originally only found in large buildings or public buildings, though this changed when production became less expensive and craftsmen could make larger frames with more glass. At the end of the 18th century, sash windows had become the most sought-after wooden style in British homes. Sash windows were easy to operate and let light in rooms without the need for curtains.

The first windows were made of clear glass however, by the 17th Century the sash windows began to become more attractive. They started with coloured glazing bars or mullions. These were very expensive at the time, but as glass production improved and cheaper they were a common feature in numerous period houses.

In the 19th century, it was possible to make large, sturdy glass that did not require supporting bars. This allowed for the frame to be made larger and, in turn, gave an improved view. This was a significant innovation.

The introduction of the double glazed door repairs-hung sliding sash is another important improvement that was made in the I920s and the beginning of the I930s. The double-hung sliding sash is another significant improvement that came about at the end of the I920s and at the beginning of the I930s.

Oak was used in older examples and for more prestigious buildings. A parting bead separates the two sashes. It is vital that it is maintained in order to avoid rattles and draughts. The sash pulleys, idler wheels and sash rollers also are crucial to the operation of the window.

2. Energy efficiency

Sash windows were replaced by hinged casements as larger and clearer sheets became available. They were made of plate glass, set in timber frames with rebates and secured with glazing sprigs, with putty on both sides to make them watertight. This type of glass gradually replaced leaded lights.

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

With regular maintenance, sash windows are very energy efficient. If they are not maintained they can get drafty. Paint and putty may also cause draughts. This issue can be fixed by using wood-to-timber solutions.

The replacement window industry relies on the perception that traditional windows are rotten and beyond economical repair, while they can be maintained with just a little care. However, repairs to these windows are costly and can cause considerable disruption to the home. Many homeowners decide to replace their windows using PVC-u from a huge "one-stop shop" installation company. They can replace and remove all the windows in a house in just one day, eliminating the need to coordinate different tradesmen and making the entire process much more efficient. These windows can be equipped with energy-saving double glazing to get higher energy ratings than the traditional windows with sash. However double-glazed windows cannot replicate the section and proportions of historic timber sashes.

3. Security

Traditional windows can be made secure without compromising their style. Ironmongery such as sash chain, mortice bolts, and sash lock can be put in place. These can be put in place to ensure that the window repair is capable of being opened for ventilation or cleaning. They are usually discrete since they are made to work with sash windows. They can be used in conjunction with traditional sash window catches. They should be replaced by more robust versions, such as those with double glazing repairs screws or spring levers, to minimize the risk of being struck by hammers.

Sash-window frames are usually made from oak or slow-grown deal. If the glazing bars are in good condition and in good condition, they should be kept. Where feasible, the cills made of timber should be replaced with timber that is compatible with. PVC-U companies usually offer a one stop shop installation service, which includes removing and replacing windows on a complete home in a single day without the need to involve other tradespeople or coordinate visits from a number of different suppliers.

4. Ventilation

When sash windows were first introduced in the 17th century they allowed a large amount of light into structures. By the end 18th century, they had been modified to allow more light could be let into rooms. Larger glazing panes were also made. The result was a lighter look and windows that were more elegant.

Sash windows were introduced and required a new type of ironmongery. Early pulleys were constructed out of wood. Later Victorian ones were made of brass or a combination of wood and leaded. There were also various kinds 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.

Timber windows require careful maintenance to keep them in good condition. Inattention to maintenance routinely could result in:

Sashes that do not slide easily.

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

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

In the I920s and I930s, steel casement windows grew in popularity due to their durability slim and inexpensive, and complemented the vogue for healthy living. Research has shown that softwood sash window are as efficient as PVC-u windows, and may even be more attractive.

The replacement window industry has done a great job convincing homeowners that their old windows were decayed drafty, noisy and beyond repair. The reality is that many older timber windows are in good condition and with minor repairs to upvc doors could easily be repaired for many years to be.

5. Maintenance

A traditional sash window requires regular maintenance and inspection. Inability to keep up with this can lead to sash cords breaking, excessive wear on the glazing bars and the deterioration of putty and paint. The removal of sashes could also cause structural movement in the frame, which can cause the sash not to close correctly. It is also possible for the sash to be snagged or fixed in the open position and let water and draughts enter the property.

The damage to timber windows is usually caused by moisture penetration. This can be prevented by thorough painting, periodic repairs, and removing the source of dampness. The paint can be removed to expose the soft, rotting wood. The sections of timber that are rotten should be carefully removed and the affected area should be scarfed or glued together by using replacements of the same kind as the timber that remains. This repair method increases the amount of fabric used in the first place and is among the most minimally invasive methods of treating wood-to-timber rot.

The use of a resin-based wood consolidant is an alternative to traditional sanding and staining. It is brushed on the surface of the wood to stabilise and shield it from further damage. It is particularly beneficial for the treatment of pulleys and sash cords which help stop breakage.

It is important that any ironmongery from the past such as sash stays and latches are retained and restored rather than replaced. It can be difficult to replace these items without compromising their original design. It is also recommended that modern aluminium fittings, such as sashlifts and chainstays, be avoided as they can cause corrosion and deterioration of timber frames and sashes.