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10 Things People Hate About Sash Windows Cambridge
How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge feature traditional sash window and homeowners are proud of their appearance. Sash windows can become stuck and become difficult to open or shut. This is typically due to moisture which can cause the wood to swell.

Traditionally, windows made of box sash used chains or cotton cord and weights made of lead to operate. Modern sash windows have hidden springs to solve this issue.

1. Aesthetics

Timber sash windows, in contrast to PVC-u windows, which are made in imperial sizes and are modular, can be reconstructed to their original size. This permits the re-installation of timber sash windows in order to meet current energy requirements and conform to conservation area regulations. It also offers an option that is superior to uPVC alternatives.

Sliding frames for windows made of sash were originally only used for large buildings or public buildings. However, this changed when production became more affordable and artisans could create larger frames using greater 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.

Early windows were plain glass but by 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 cheaper they became a feature of many period houses.

In the 19th century, it was possible to make large, strong glasses that did not require support bars. This allowed for the frame to be made larger which, in turn, provided a better view. This was an important innovation.

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

The most commonly used type of sash is constructed from slow grown deal (pine) however oak was utilized in more prestigious buildings and in some earlier examples. A split bead divides the two sashes and it is vital that it is well maintained to prevent rattles and draughts. It is also important that sash pulleys and idler wheels are kept in good working order as they aid in operating the window.

2. Energy efficiency

As larger and clearer sheets of glass became available, sash windows began replacing hinged casements. They were glazed with plate glass set in timber frames with rebates and then pinned with glazing sprigs and putty on both sides to make them watertight. This kind of glazing gradually replaced 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 and stoppers for sashes shutter hinges and handles and a variety of fasteners used to fix the sashes. upvc door repairs were often decorated with designs, inscriptions, and engraved patterns to identify the maker.

Sash windows can be extremely energy-efficient with regular maintenance. However, if they are not maintained, they can become draughty and let in cold air. Paint and putty may cause draughts. It is possible to fix this issue by using wood-to-timber products.

The market for replacement windows is based heavily on the belief that old windows are damaged beyond repair and are not able to be maintained economically. However, they can easily be maintained with a bit of attention. However, repairs to these windows can be costly and cause considerable disruption to the home. To avoid this homeowners often prefer to replace their windows with PVC-u windows from one the large 'one stop shop' installation companies. They can replace and remove all windows in a home in a single day, avoiding the need to co-ordinate different tradesmen and making the whole process much more efficient. They are also available with 'energy saving' double-glazing to get higher energy efficiency ratings than are possible with traditional sash windows. These double-glazed units are not able to replicate the proportions and section of the sashes made of timber from the past.

3. Security

It is possible to secure windows that are traditional without compromising their style. Ironmongery like sash chain, mortice bolts, and sash lock can be put in place. These can be installed so that the window remains able to be opened to allow ventilation or for cleaning. These windows are typically not noticeable since they are designed to be used in conjunction with sash windows. They can be used in conjunction with traditional sash-window catches and should be replaced with more robust models (such ones with double screws) or spring-loaded levers to minimize the possibility of them being hammered open.

Sash-window frames are typically made from oak or slow-grown deal. If glazing bars have survived, they should be kept, and if it is possible, the timber of the cill should be replaced by identical wood. Many PVC-U firms offer a one-stop shop installation service. They can take down and replace windows throughout a home in one day, without involving other tradespeople.


4. Ventilation

When sash windows first introduced in the 17th century they allowed a large amount of light to flood into structures. At the end of the 18th century, they were altered to allow more light into rooms, and larger glass panes began to be produced. The result was a more light appearance and windows with more elegance.

Sash windows were introduced and required a new range ironmongery. Early pulleys could be made from wood. Later Victorian ones were made of brass or a mixture of wood and leaded. There were also various kinds of knobs and shutter hinges. These ironmongery pieces must be cleaned and preserved to appreciate their exquisite design.

To ensure they remain in good condition, timber windows must be maintained. Lack of regular attention may lead to:

Sashes that don't slide easily.

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

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

In the I920s and the I930s steel casement windows gained popularity because they were strong slim and affordable and were in line with the trend for healthy living. However, research has proven that traditional softwood sash windows are as thermally efficient as double-glazed PVC-u windows and can be more attractive than the modern sleek design of casement windows.

The replacement window industry has done a lot to convince homeowners that their old windows are dirty, noisy and beyond economic repair. The truth is that a lot of older timber windows are in good condition and with minor repairs can 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 lead to sash cords breaking, excessive 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 correctly. The sash can also be stuck in the open position, allowing the water and drafts to enter the property.

Moisture penetration is a frequent cause of damage to windows made of timber. This can be avoided by thorough painting, periodic repairs and elimination of the cause of dampness. The paint can be removed to expose the soft, decaying wood. The rotten timber sections should be carefully removed, and the affected area should be scarfed or pieced together with replacements of the exact type as the remaining timber. This method of repair increases the amount of fabric that was originally used and is one of most non-invasive methods to treat timber-to-timber rot.

A resin-based wood condenser is an alternative to the traditional staining or sanding. It is brushed on the surface of the wood to stabilise and protect it from further damage. It is particularly useful for treating pulley cords and sash, which can help prevent breakage.

It is essential to preserve and not replace any historical ironmongery such as sash latches and stays. They can be extremely difficult to replace without compromising the the original design. It is also recommended that modern fittings made of aluminium like sashlifts, as well as chainstays, be avoided as they can cause corrosion and deterioration of timber frames and sashes.