How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge have traditional sash windows and homeowners are proud of their appearance. However, sash windows can become stuck and difficult to open or close. This is typically due to moisture which can cause the wood to expand.

(Image: https://www.repairmywindowsanddoors.co.uk/wp-content/uploads/2014/12/Glass-Replacement-150x150.jpg)Traditionally, box sash windows utilised chains, cotton cords or weights made of lead to operate. Modern sash windows feature hidden springs to address this problem.

1. Aesthetics

Unlike PVC-u windows that are constructed according to the modular imperial size, timber sash windows can be restored to their original sizes. This lets the restoration meet modern day energy requirements while ensuring compliance with conservation areas regulations. It also gives a window with a far superior appearance than uPVC alternatives.

Sliding sash window installation cambridge frames were initially intended for large structures or public buildings. However this changed as production became cheaper and artisans could make larger frames using larger glass. In the 18th century, Sash windows were the most popular design of wood in the majority of British homes. Sash windows were simple to operate and let light in rooms without the need for curtains.

The early windows were made of glass that was plain, but in the 17th century sash windows started to become more ornamental. They were initially made of colored glazing bars, also known as mullions. These were very expensive at the time but as glass production improved and cheaper they were a common feature in many of the period homes.

In the 19th century it was possible to manufacture large, sturdy glass that didn't require supporting bars. This allowed for the frame to be enlarged and, in turn, gave an improved view. This was a significant advancement.

Another significant improvement was the introduction of the double-hung sliding window at the end of the I920s and beginning of the I930s. The double-hung sliding sash is another important improvement that came into existence at the end of the I920s and at the beginning of the I930s.

Oak was used in older examples and more prestigious buildings. A parting bead is used to separate the two sashes. It is vital that it is maintained to prevent rattles and drafts. The idler wheels, sash pulleys and sash rollers also are vital to the functioning of the window.

2. Energy efficiency

As clearer and larger glass sheets were made available, sash windows started replacing hinged casements. Glass plates were set in rebated timber frames, secured with glazing sprigs and putty was applied to the frame's two sides to ensure watertightness. This type of glazing gradually replaced leaded lights.

Sashes were introduced, which resulted in an increase in demand for ironmongery. The most basic fittings were brass pulleys (and later cast-iron) weights as well as sash stoppers, shutter hinges and handles, and various fasteners used to secure the sashes. These were usually decorated with motifs, inscriptions, and patterns engraved to identify the maker.

Sash windows can be very energy efficient if they are maintained regularly. If they are not maintained they could become draughty. Paint and putty may cause draughts too. It is possible to fix this issue by using wood-to-timber products.

The replacement window industry relies on the belief that old windows are damaged and beyond economical repair, while they can be maintained with just a little care. Repairs can be costly and cause many disruptions in the home. To prevent this homeowners, many prefer to replace their windows with PVC-u windows from one the large ”one-stop shop” installation companies. They can replace all windows in a home in one day, thereby saving time and eliminating the need for different tradesmen to coordinate. They are also available with 'energy-saving' double-glazing to get greater energy efficiency than are possible with 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 more secure without compromising their appearance. A variety of ironmongery types can be installed, including sash chains, mortice bolts, and locks for sash. These can be installed to ensure that the window is open for ventilation or for cleaning. These are typically minimal in appearance, as they are designed to match the sash window supplier cambridge. They can be utilized in conjunction with traditional sash window catches that are required to be replaced with more robust models (such ones with double glazing repairs near me screws) or spring-loaded levers to minimize the risk of them being opened by hammering.

Sash-window frames are typically made from oak or slow-grown deal. Where glazing bars have survived they should be preserved, and if it is it is possible, the timber of the cill should be replaced with identical wood. PVC-u companies typically provide a one-stop shop installation service, removing and replacing windows across a home in one day, without the need to engage other tradespeople or coordinate visits from different suppliers.

4. Ventilation

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

The introduction of sash windows also required an entirely new range of ironmongery. The first pulleys were made of wood, while later Victorian ones were made of brass or a combination of lead and wood and there were many kinds of shutter hinges and knobs. Ironmongery elements must be kept and cleaned so that the fine quality of their design can be appreciated.

Timber windows require careful maintenance to ensure they remain in good condition. A lack of attention to them regularly could cause:

Sashes that do not slide easily.

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

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

Steel aluminium Casement windows cambridge windows gained popularity in the I920s and I930s because they were strong and slim, cost-effective and matched the trend of healthy living. Studies have shown that softwood sash window are just as effective 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 economic repair. However, many old windows made of wood are in good condition and, with minor repairs, could easily be maintained for years to be.

5. Maintenance

Traditional sash windows require regular maintenance and inspection. Inability to keep up with this can result in broken sash cords, 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, causing the sash to not close properly. It is also possible for the sash to be stuck or slammed into an open position and let water and draughts in the property.

Moisture penetration is the most common cause of damage to windows made of timber. This can be prevented by regular maintenance as well as thorough painting, and then removing the cause of dampness. Wet rot is recognisable by the wavy appearance of the paint that can be stripped away to reveal soft, rotting wood. Any rotten timber sections should be cut off and the affected area should be carefully scarfed or pieced in using replacements made from the same type of wood as the ones that remain. This method of repair maximizes the amount of fabric used in the first place and is one of most minimally invasive methods of treating timber-to-timber rot.

The use of a wood consolidant made from resin is another alternative to traditional staining and sanding. It is brushed on the surface of the timber to help stabilize it and protect it from further damage. It is especially beneficial to treat sash and pulley cords, where it can prevent breakage.

It is essential that any ironmongery from the past such as sash stays and latches be kept and rehabilitated instead of being replaced. They can be extremely difficult to replace without harming the the original design. It is recommended that the use of modern aluminum fittings like chain stays and sash lifts is avoided whenever possible since they can cause corrosion and deterioration to timber frames and sashes.