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How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge have sash windows that are traditional and homeowners are proud of the way they look. Sash windows can become stuck and be difficult to open and close. This is often due to moisture that can cause the timber to swell.

Traditionally, window boxes used chains, cotton cords or lead weights to operate. Modern window springs for sash windows are concealed to eliminate this issue.

1. Aesthetics

Contrary to PVC-u windows which are constructed according to imperial sizes that are modular Timber sash windows can be restored to their original size. This allows the restoration of timber sash windows to comply with current energy standards and comply with conservation regulations for areas. It also gives a window with a far superior appearance than uPVC alternatives.

Sliding sash windows were initially only used in large structures or public buildings, however this changed as production was less expensive and craftsmen were able to make larger frames with more glass. By the late 18th century windows made of sash were the predominant design of wood in the majority of British properties. Sash windows were easy to operate and let light in rooms without the use of curtains.

The first windows were made of clear glass However, in the 17th century, sash windows began to be more decorative. They began with colored glazing bars, also known as mullions. They were costly at first, but as glass production became less expensive and more efficient, they became a common feature in many homes of the period.

In the 19th century, it was possible to make large, sturdy glasses that did not require support bars. This allowed the frame size to increase further, which gave a better view out of the window. This was an important innovation.

The introduction of the double-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 important improvement that came into existence at the end of the I920s and beginning of the I930s.

Oak was used for older examples and more prestigious buildings. It is important to maintain the parting bead that divides the sashes. This will help prevent rattles and draughts. The sash pulleys, idler wheels and sash rollers also are vital to the operation of the window.

2. Energy efficiency

As larger and clearer glass sheets were made available, sash windows began to replace hinged casements. They were glazed with plate glass placed within timber frames with rebates and pinned in place using glazing sprigs, and then putty on both sides to ensure they were watertight. This kind of glazing gradually superseded the leaded light bulbs.

The introduction of sashes resulted in 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 stoppers, shutter hinges and knobs as well as a range of fasteners that secured the sashes in place. These were often decorated in patterns, inscriptions and engravings to identify the maker.

With regular maintenance, sash windows are very energy efficient. But, if you don't maintain them, they may become drafty and let in cold air. Paint and putty may also cause draughts. This can be remedied by making use of wood-to-timber repair tools that are proprietary.

The industry of replacement windows is based on the perception that traditional windows are rotten and beyond repair, while they are able to be maintained with a little attention. Repairs can be expensive and cause many disruptions in the home. Many homeowners choose to replace their windows with PVC-u from a "one-stop shop" installation company. They can take down and replace all the windows in a house within a single day, eliminating the need to coordinate different tradesmen and making the whole process much faster. They can also be supplied with energy-saving double-glazing to achieve more energy efficient ratings than traditional windows with sash. These double-glazed windows aren't 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 appearance. Ironmongery such as mortice bolts, sash chain and sash locks can be put in place. These can be installed to ensure that the window remains open for ventilation or cleaning. These are typically not noticeable, since they are designed to complement the sash window. 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 levers to decrease the possibility of them being hammered out.

Sash-window frames are usually constructed from oak or slow-grown deal. If the glazing bars are in good condition and in good condition, they should be kept. If it is feasible, the cills made of timber should be replaced with wood that is in line with. PVC-u companies often offer a one stop shop installation service that can remove and replacing windows on a complete home in one day, without the need to engage other tradespeople, or coordinate visits from different suppliers.

4. Ventilation

When sash windows were first introduced in the 17th century, they allowed a significant amount of light to flood into the buildings. At the end of the 18th century, they were adapted so that even more light could be let into rooms. Larger glass panes were also made. The result was a more light appearance and windows with more elegance.

wooden windows and doors cambridge of sash windows also required an entirely new range of ironmongery. Early pulleys were of wood, later Victorian ones were made from brass or a mixture of lead and wood and there were various types of shutter hinges and knobs. These ironmongery pieces should be maintained and cleaned to appreciate their fine design.

Timber windows require careful maintenance to ensure they remain in good shape. Inattention to maintenance routinely could result in:


Sashes that do not move easily.

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

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

In the I920s and the I930s steel casement windows grew in popularity due to their strength, slim and cheap, and complemented the vogue for healthy living. Studies have shown that softwood sash windows are as efficient as PVC-u windows and can even be more attractive.

The window replacement industry has done a great job convincing homeowners that their old windows were decayed drafty, noisy and beyond repair. Many old timber windows can be fixed and used for many more years with minor repairs.

5. Maintenance

The traditional sash windows need regular maintenance and inspection. If you don't maintain your sash window, it could cause the sash cords breaking, and the glazing bars deteriorating excessively. It can also cause the paint and putty to become damaged. The removal of sashes may also result in structural movement within the frame, causing the sash not to close properly. The sash can also be stuck in an open position, which allows water and draughts into the property.

Moisture penetration is a common cause of damage to windows made of timber. This can be prevented by careful painting, regular repairs, and removing the cause of dampness. Wet rot can be identified by the wavy look of the existing paint which can be stripped to reveal soft, rotting timber. Any rotten timber sections should be cut out and the affected part carefully cut or pieced with replacements made of the same type of timber as those remaining. This method of repair maximises the amount of fabric that is left and is one of the least invasive methods of treating decay of timber to timber.

The use of a wood consolidant made from resin is an alternative to traditional staining and sanding. It is brushed onto the surface of the wood to protect it and stabilize it. It is particularly beneficial in the treatment of sash cords and pulleys which can help prevent breakage.

It is essential to preserve and not replace any historic ironmongery, like the sash latches and stays. These items can be very difficult to replace without damaging the quality of the original design. It is also advised that fittings made of aluminum, such as sashlifts and chainstays, are avoided since they can cause corrosion and deterioration of timber frames and sashes.