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20 Fun Informational Facts About Sash Windows Cambridge
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 may become stuck and difficult to open or close. This is often due moisture that can cause the timber to expand.


Box sash windows were historically operated by chains or cotton cords, as well as lead weights. Modern sash windows have hidden springs to overcome this issue.

1. Aesthetics

In contrast to PVC-u windows, which are manufactured according to imperial sizes that are modular Timber sash windows can be restored to their original sizes. This permits the re-installation of timber sash windows in order to comply with current energy standards and comply with conservation area regulations. It also comes with an option that is superior to the uPVC options.

Sliding frames for windows made of sash were originally only used in large buildings or public buildings. However this changed as production became more affordable and artisans could produce larger frames with larger glass. At the close of the 18th century, sash windows were the most popular wooden style in British homes. Because they were simple to open sash windows allowed light into rooms without the need for 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 windows were quite expensive at the time but as glass production improved and cost-effective, they became a part of many of the period homes.

In the 19th century, it was possible to make large, sturdy glasses that didn't need supporting bars. This allowed the frame to be enlarged, which in turn gave an improved view. This was a significant innovation.

The introduction of the double-hung sliding sash is another significant improvement that came about in 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 common type of sash is constructed of slow-growing deal (pine) but oak was also used in more expensive buildings as well as in earlier examples. A split bead divides the two sashes, and it is important that this is maintained in order to avoid rattles and draughts. repairmywindowsanddoors.co.uk is also crucial that sash pulleys and idler wheels are kept in good working order as they aid in operating the window.

2. Energy efficiency

Sash windows were replaced by hinged casements as clearer and larger sheets became available. They were glazed with plate glass placed within timber frames with rebates and then pinned with glazing sprigs and putty on both sides to create a watertight seal. This kind of glazing gradually replaced the use of leaded lights.

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

Sash windows can be very energy-efficient with regular maintenance. However, without this maintenance they can become draughty and let in cold air. Paint and putty may cause draughts. This can be remedied by using proprietary wood-to-timber repair products.

The industry of replacement windows relies heavily on the notion that old windows are damaged beyond repair and are not able to be maintained economically. However windows can be easily maintained with a bit of attention. These repairs can be costly and cause many disruptions in the home. Many homeowners opt to replace their windows with PVC-u from a huge 'one-stop shop' installation company. They can replace all windows in a house in one day, saving time and eliminating the need for different tradesmen to coordinate. They are also available with energy-saving double-glazing to get more energy efficient ratings than those offered by traditional windows made of sash. These double-glazed units are not able to replicate the proportions and sections of the sashes made of timber from the past.

3. Security

It is possible to secure traditional windows without compromising their appearance. Ironmongery, such as sash chain, mortice bolts, and sash lock can be put in place. They can be positioned in a manner that the window can still be opened to allow ventilation and cleaning. They are usually unobtrusive as they are designed to be used in conjunction with sash windows. They can be used in conjunction with traditional sash window catches, which are required to be replaced with more robust versions (such ones with double screws) or spring levers to decrease the possibility of them being hammered out.

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

4. Ventilation

Sash windows were introduced in the 17th Century and allowed for a significant amount of light to enter buildings. By the end of the 18th century, they were altered to allow even more light into rooms and bigger glazing panes started to be made. The result was a lighter look and windows with more elegance.

The introduction of sash windows also demanded an entirely new range of ironmongery. Early pulleys were constructed of wood. Later Victorian ones were made of brass or a combination of leaded and wood. There were also different 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.

To keep them in good condition, wooden windows require regular maintenance. Lack of regular attention may cause:

Sashes that do not slide smoothly.

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

break down of putty allowing water penetration, which could cause decay in the frame and cill.

In the I920s and I930s, steel casement windows grew in popularity due to their strength slim and inexpensive and also matched the fashion for healthy living. Research has proven that softwood sash window are as efficient as PVC-u windows and can even be more attractive.

The industry of replacement windows has made a significant effort to persuade house owners that their traditional windows are rotten, draughty and beyond repair. Many older timber windows can be repaired and utilized for a longer period with minor repairs.

5. Maintenance

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

Damage to windows made of timber is usually caused by moisture entry. This can be prevented by thorough painting, regular repairs, and removing the source of dampness. The paint can be removed to reveal the soft, decaying wood. The rotten timber sections should be carefully removed and the affected area should be snared together or pieced together by using replacements of the same nature as the rest of the timber. This repair method increases the amount of fabric that was originally used and is among the most non-invasive methods to treat timber-to-timber rot.

A wood condenser that is based on resin is a viable alternative to traditional process of sanding or staining. This is brushed onto the surface of the wood to stabilize it and shield it from further damage. It is especially beneficial for treating sash and pulley cords, which can help prevent breakage.

It is essential that any historic ironmongery such as sash stay and latches be kept and rehabilitated instead of being replacing them. It is difficult to replace these items without altering their original design. It is also recommended that modern aluminium fittings like sashlifts, as well as chainstays, are avoided since they can cause deterioration and corrosion of timber frames and sashes.

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