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10 Unquestionable Reasons People Hate Sash Windows Cambridge
How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge feature traditional sash window and the homeowners are proud of their appearance. Sash windows can get stuck and are difficult to open and close. This is usually due to moisture that can cause the timber to expand.

Box sash windows were traditionally operated with chains, cotton cords and lead weights. Modern sash windows feature hidden springs to solve this problem.

1. Aesthetics

In contrast to PVC-u windows, which are manufactured according to imperial sizes that are modular the timber sash windows are able to be restored to their original sizes. This permits the re-installation of timber sash windows in order to comply with current energy standards and to comply with conservation regulations for areas. It also gives windows that have a superior appearance than uPVC alternatives.

Sliding sash window frames were initially only used for large buildings or public buildings. However the production became more affordable and artisans could create larger frames using more glass. At the close of the 18th century, sash windows had become the most popular wooden style in British homes. Because they were simple to open sash windows allowed light into rooms without curtains.

The first windows were made of plain glass, but in the 17th century, sash windows were becoming more decorative, with coloured glazing bars and moulded mullions. These were very expensive at the time, but as glass production improved and less expensive, they became a feature of many period houses.

In the 19th century, it became possible to make large, strong glasses that didn't require support bars. This allowed the frame to be made larger and, in turn, gave an improved view. This was an important advancement.

The introduction of the double-hung sliding sash was a important improvement that occurred towards the end of the I920s and at the beginning of the I930s. The double-hung sliding sash was a important improvement that was made at the end of the I920s and beginning of the I930s.

The most commonly used kind of sash is made from slow-growing deal (pine) but oak was used in the more luxurious buildings and in some earlier examples. A split bead divides the two sashes and it is vital that it is maintained to prevent rattles and draughts. It is also important that the idler and sash pulley wheels are in good shape as they help to operate the window.

2. Energy efficiency

As clearer and larger sheets of glass became available, sash windows began replacing hinged casements. They were made of plate glass, placed within timber frames with rebates and secured with glazing sprigs, with putty on both sides to make them watertight. This type of glazing gradually replaced led lights.

Sashes were introduced, which resulted in a greater demand for ironmongery. The most common fittings included brass pulleys (and later cast-iron) weights, sash stoppers shutter hinges, handles and shutter hinges as well as various fasteners used to fix the sashes. These were usually decorated with designs, inscriptions, and engravings to identify the maker.

With regular maintenance, sash windows are extremely energy efficient. If they are not maintained they can get noisy. Paint and putty may also cause draughts. This can be fixed by making use of wood-to-timber repair tools that are proprietary.

The industry of replacement windows is based on the perception that old windows are damaged and beyond economical repair, whereas they can be easily maintained with a little attention. However, these repairs can be expensive and involve considerable disruption to the home. Many homeowners decide to replace their windows with PVC-u from a huge 'one-stop shop' installation company. These can remove and replace all windows in an entire house within a single day, avoiding the need to coordinate different tradesmen and making the whole process much quicker. They can also be supplied with 'energy saving' double-glazing to get greater energy efficiency than traditional windows with sash. However double-glazed windows cannot replicate the section and proportions of traditional timber sashes.

3. Security

Traditional windows can be secured without compromising their style. Ironmongery, such as mortice bolts, sash chain and sash lock could be used. These can be put in place so that the window remains capable of being opened to allow ventilation or cleaning. They are usually discrete since they are made to be used in conjunction with sash windows. They can be utilized in conjunction with traditional sash-window catches and must be replaced by more robust models (such as those incorporating double screws) or spring levers to decrease the risk of them being hammered open.

Sash-window frames were constructed from slow-growing deal or, in more elegant homes they were made from oak. When glazing bars have survived they should be kept and if it is possible, the timber of the cill should be replaced with the same wood. PVC-u companies typically offer a one stop shop installation service, 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 first introduced in the 17th century they allowed a large amount of light to flood into buildings. In the 18th century, they were adapted so that even more light could be let into the rooms. Larger glazing panes were also made. The result was a much more streamlined appearance, and windows that had a higher level of elegance than they had before.

The introduction of sash windows also required a new range of ironmongery. Early pulleys could be made out of wood. Later Victorian ones were made of brass or a mix of wood and lead. There were also a variety of kinds of shutter hinges and knobs. The ironmongery components should be maintained and cleaned so that the fine quality of their design can be appreciated.

To keep them in good condition, wooden windows need to be maintained. Inattention to maintenance routinely could cause:

Sashes that do not slide smoothly.

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

The putty can be soaked by water and cause decay to the frame or cause cill.

In the I920s and I930s steel casement windows increased in popularity due to their strength, slim and cheap and were in line with the trend for 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 can be more attractive than the modern sleek design of casement windows.

The replacement window industry has done a great job convincing homeowners that their old windows were decayed, drafty and beyond economical repair. Many old timber windows can be repaired and utilized for a longer period with minor repairs.

5. Maintenance

Traditional sash windows require regular maintenance and inspection. Inability to maintain it properly could result in the sash cords breaking, a lot of wear on the glazing bars, and deterioration of paint and putty. The removal of sashes may also cause structural movement in the frame, causing the sash not to close properly. It is also possible for the sash to be stuck or slammed into an open position, which can let water and draughts enter the property.

Moisture penetration is the most common cause of damage to timber windows. This can be prevented by regular maintenance, thorough painting and removing the cause of dampness. Wet rot is recognisable by the wavy look of the existing paint which can be stripped to reveal soft, rotting timber. The sections of timber that are rotten should be carefully removed and the affected area should be scarfed together or glued together by using replacements of the same type as the remaining timber. This method of repair maximises the amount of fabric that is left and is among the least invasive methods of treating decay caused by timber.

repairmywindowsanddoors.co.uk made of resin is an alternative to traditional process of sanding or staining. It is brushed onto the surface of the wood to protect it and strengthen it. It is especially useful for treating pulley cords and sash which can stop breakage.


It is essential that any ironmongery from the past like sash stays and latches be kept and restored instead of replacing them. It can be difficult to replace these items without altering their original design. It is also advised that modern aluminium fittings like sashlifts, as well as chainstays, are avoided since they could cause corrosion and deterioration of timber frames and sashes.