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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 their appearance. Sash windows can get stuck and are difficult to open and close. This is often due to moisture, which can cause the timber to swell.

Traditionally, box sash windows utilised chains, cotton cords or lead weights to operate. Modern windows with sash springs are concealed to avoid this issue.

1. Aesthetics

Timber sash windows, unlike PVC-u windows, which are made in imperial sizes, which are modular, can be reconstructed to their original size. This allows the restoration of timber sash windows to comply with current energy standards and conform to conservation regulations for areas. It also comes with an option that is superior to the uPVC alternatives.

Sliding sash windows were initially only used in large buildings or public buildings, however this changed as production became cheaper and craftsmen could make larger frames with more glass. In the 18th century, Sash windows were the most popular wooden design in most British properties. Sash windows were easy to operate and let light into rooms without the need for curtains.

Early windows were simple glass, but in the 17th century, sash windows started to become more attractive with coloured glass bars and moulded mullions. They were expensive at the time, but as glass production became more efficient and cost-effective, they became a part of numerous period houses.

In the 19th century, it was possible to produce large, strong glasses that didn't need support bars. This allowed the frame's size to be increased even further, which meant more of a view from the window. This was a very important advancement.

The introduction of the double-hung sliding sash was a significant improvement that came about in the I920s and 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.

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





2. Energy efficiency

As clearer and larger sheets of glass were made available, sash windows began to replace hinged casements. Glass plates were set in frames made of timber, which were which were pinned with glazing sprigs, and putty was then sprayed onto the frame's sides for watertightness. This type of glass gradually replaced the leaded light bulbs.

The introduction of sashes resulted in the need for a wider range of ironmongery, with the basic fittings being brass pulleys, lead (and later cast iron) weights, sash stops shutter hinges and knobs and a variety of fasteners that secured the sashes in the right place. They were often decorated with designs, inscriptions, and engravings to identify the maker.

Sash windows can be very energy efficient when they are maintained regularly. But, if you don't maintain them, they can become draughty and let in cold air. Paint and putty may cause draughts. This issue can be fixed by using wood-to-timber solutions.

The replacement window industry relies on the belief that traditional windows are rotten and beyond economical repair, whereas they are able to be maintained with a little attention. Repairs can be expensive and cause many disruptions in the home. Many homeowners decide to replace their windows using PVC-u from a huge "one-stop shop" company for installation. They can take down and replace all windows in an entire house in a single day, eliminating the need to co-ordinate different tradesmen and making the entire process much faster. These windows can be equipped with energy-saving double glazing to get higher energy ratings than traditional windows made of sash. However these double-glazed units are unable to replicate the section and proportions of historic timber sashes.

3. Security

Traditional windows can be secured without compromising their style. There are many types of ironmongery that can be fitted with sash chains, mortice bolts, and sash locks. These can be installed in a way that the window remains capable of being opened for ventilation or for cleaning. These products are usually unobtrusive, as they are designed to fit the sash window. They can be used with traditional sash window catches. They should be replaced with more robust models, such as those with double screws or spring levers to decrease the possibility of being struck by hammers.

Sash-window frames are traditionally made from oak or slow-grown deal. If the glazing bars are intact and in good condition, they should be kept. Where feasible, the cills made of timber should be replaced by timber that is compatible with. 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 any other tradespeople.

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 altered to allow even more light into rooms, and bigger glazing panes started to be manufactured. The result was a lighter appearance and windows that had a higher quality of design than before.

The introduction of sash windows also required a new range of ironmongery. The first pulleys were made of wood, later Victorian ones could be made of brass or a combination of lead and wood, and there were a variety of shutter hinges and knobs. Ironmongery elements must be retained and cleaned down to ensure that the exquisite quality of their design can be appreciated.

To ensure they remain in good condition, timber windows must be maintained. Inattention to maintenance routinely could cause:

Sashes that do not slide effortlessly.

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

break down of putty allowing water penetration that could lead to decay of the frame and cill.

Steel casement windows gained popularity in the I920s and I930s because they were sturdy and slim, and also because they were cheap and matched the trend of healthy living. However, research has revealed that traditional softwood sash windows can be just as efficient thermally as double-glazed windows made of PVC-u, and can be more attractive than the modern sleek design of casement windows.

The replacement window industry has made a significant effort to convince homeowners that their traditional windows are old, dirty, and beyond repair. However, many old windows made of wood are in good shape and with minor repairs can easily be maintained for years to be.

5. Maintenance

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

Moisture penetration is the most common cause of damage to windows made of timber. This can be avoided by thorough painting, periodic repairs, and removing the source of dampness. Wet rot can be identified due to the wavy appearance of the paint, which can be stripped to reveal soft, rotting wood. Any timber that is rotting should be cut out and the affected area should be carefully scarfed or pieced in using replacements made from the same type of timber as the ones remaining. This method of repair maximizes the amount original fabric and is one of most minimally invasive methods of treating the rot that occurs between timber and timber.

lock replacements cambridge made of resin is a viable alternative to traditional staining or sanding. The product is brushed on to the surface of the timber to stabilize it and protect it from further damage. It is especially beneficial for treating sash and pulley cords, which can stop breakage.

It is important that any ironmongery from the past such as sash stays and latches be kept and restored instead of replaced. It can be difficult to replace these items without compromising their original design. It is also recommended that modern aluminium fittings like sashlifts and chainstays, be avoided as they could cause corrosion and deterioration of timber frames and sashes.