How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge feature traditional sash window and the homeowners are proud of their appearance. However, sash windows can become stuck and difficult to open or close. This is usually due to moisture, which can cause the timber to swell.

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

1. Aesthetics

Timber sash windows, in contrast to PVC-u windows which are manufactured in imperial sizes, which are modular, can be restored to their original size. This permits the re-installation of timber sash windows in order to meet the current energy requirements and to comply with conservation regulations for areas. It also provides windows that have a superior appearance than upvc window renovation alternatives.

Sliding sash windows were originally only found in large buildings or public buildings, however this changed when production was less expensive and craftsmen were able to create larger frames using more glass. At the end 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 curtains.

Early windows were plain glass, but in the 17th century, sash windows started to become more decorative with coloured glazing bars and moulded mullions. They were costly at the beginning but when glass production became less expensive and more efficient, they were an integral feature in many historic homes.

In the 19th century it was possible to create large, strong glass that didn't require supporting bars. This allowed the frame's size to be enlarged further, which allowed for a wider view from the window. This was an important innovation.

Another significant improvement was the introduction of the double-hung sliding window at the end of the I920s and beginning of the I930s. This allowed both the lower and upper sash to be opened simultaneously, and allowed for better ventilation to the building.

The most commonly used type of sash is made from slow grown deal (pine) but oak was utilized in more expensive buildings as well as in some earlier examples. It is essential to keep the parting bead that separates the sashes. This will prevent rattles and draughts. It is also essential that sash pulleys and idler wheels are kept in good condition as these aid in operating the window.

2. Energy efficiency

As larger and clearer sheets of glass were made available, sash windows started replacing hinged casements. Plate glass was placed in frames made of timber, which were secured with glazing sprigs and putty was sprayed on both sides of the frame for watertightness. This type of glass gradually replaced led lights.

Sashes were introduced, which led to a greater demand for ironmongery. The most basic fittings were brass pulleys (and later cast-iron) weights, sash stoppers shutter hinges and handles and a variety of fasteners used to fix the sashes. They were often decorated with motifs, inscriptions or engravings that identified the maker.

With regular maintenance, sash windows can be very energy efficient. However, without this maintenance they may become drafty and let in cold air. Draughts can also be caused by the breakdown of putty and paint. This can be fixed by using wood-to-timber repair products that are specifically designed for this purpose.

The replacement window industry relies heavily on the notion 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 are costly and can cause considerable disruption to the home. Many homeowners decide to replace their windows with PVC-u from a "one-stop shop" installation company. They can replace all windows in a house in a single day, saving time and eliminating the need for multiple tradesmen to coordinate. They are also available with 'energy-saving' double glazing repairs near me-glazing to achieve greater energy efficiency than those offered by traditional windows made of sash. These double-glazed units are not capable of resembling the proportions or section of sashes from old timber.

3. Security

Traditional windows can be made more secure without compromising their style. Ironmongery such as sash chain, mortice bolts, and sash lock can be used. They can be fitted in a manner that the window is able to be opened to allow ventilation and cleaning. These windows are typically discrete since they are made to work with sash windows. They can be used in conjunction with traditional sash window catches. These should be replaced with more robust models, such as ones that have double screws or spring levers in order to reduce the chance of being struck by hammers.

Sash-window frames were made from slow-growing deal or, in the more luxurious homes, from oak. If the glazing bars remain in good condition, they should be retained. If it is possible, the timber cills should be replaced by wood that matches. PVC-u companies often provide a one-stop shop installation service, removing and replacing windows on a complete house in a day without the need to engage other tradespeople, or coordinate visits from different suppliers.

4. Ventilation

Sash windows were introduced in the 17th century and allowed for a significant amount of light to enter 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 more streamlined appearance, and windows that had a higher quality of design than before.

The introduction of sash windows also demanded a new range of ironmongery. Early pulleys were of wood, while later Victorian ones could be made of brass or a combination of wood and lead, and there were various types of shutter hinges and knobs. These ironmongery pieces should be kept clean and preserved in order to appreciate their exquisite design.

To ensure they remain in good condition, wooden windows require regular maintenance. Inattention to maintenance routinely could result in:

Sashes that do not move easily.

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

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

In the I920s and I930s steel casement windows gained popularity because they were strong slim and inexpensive, and complemented the vogue for healthy living. Research has shown that softwood sash window are just as effective as PVC-u windows, and may even be more attractive.

The replacement window industry did a lot to convince homeowners that their old windows were decayed and drafty. They were also beyond the budget for repair. The truth is that a lot of older windows made of timber are in good shape and with minor repairs could easily be maintained for years to be.

5. Maintenance

A traditional sash window needs regular maintenance and inspection. Inability to maintain it properly could result in the sash cords breaking, a lot of wear on the glazing bars, and degradation of the paint and putty. The removal of sashes can also result in structural movement within the frame that causes the sash to be misaligned and not closing properly. The sash can also be stuck in an open position, which allows water and draughts to enter the property.

Moisture penetration is the most common cause of damage to windows made of timber. This can be avoided with regular repairs by thorough painting and eliminating the cause of dampness. The paint can be removed to expose the soft, decaying wood. The sections that are rotting should be carefully cut out, and the affected area should be scarfed or pieced together with replacements of the exact kind as the timber that remains. This method of repair maximizes the amount of fabric retained and is among the least invasive methods of treating decay of timber to timber.

The use of a wood consolidant made from resin is another alternative to the traditional method of staining and sanding. The product is brushed on to the surface of the timber to stabilise and protect it from further damage. It is particularly useful for the treatment of sash cords and pulleys where it can help to prevent the breakage.

It is important to restore and not replace any historical ironmongery, like the sash latches and stays. It can be difficult to replace these items without altering their original design. It is recommended that the use of modern aluminum fittings like chain stays and sash lifts is avoided whenever possible as they can cause corrosion and deterioration to timber frames and sashes.