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How to Restore Timber Sash Windows in Cambridge

Many homes in cambridge double glazing (why not find out more) feature traditional sash window and homeowners are proud of their appearance. However, sash windows can become stuck and difficult to open or close. This is usually due to moisture that can cause the timber to expand.

Box sash windows were historically operated using chains or cotton cords, as well as weights made of lead. Modern window springs for sash windows are concealed to solve this problem.

1. Aesthetics

Timber sash windows, unlike PVC-u windows, which are made in imperial sizes that are modular, are able to be restored to their original size. This lets the restoration be in line with modern energy requirements while ensuring compliance with conservation areas regulations. It also comes with windows that are superior to the upvc door repair cost alternatives.

Sliding sash window frames were initially only used in large buildings or public buildings. However the production became more affordable and artisans could make larger frames using more glass. At the close of the 18th century, sash windows had become the most popular wooden design in British homes. As they were easy to open sash windows allowed light into rooms without curtains.

The early windows were made of clear glass however, in the 17th century sash windows started to be more decorative. They began with colored glazing bars, also known as mullions. They were expensive at the beginning but as glass production became less expensive and more efficient, they became commonplace in many historic homes.

In the 19th century, it became possible to make large, sturdy glasses that did not require support bars. This allowed for the frame to be made larger and, in turn, gave a better view. This was a significant innovation.

The introduction of the double-hung sliding sash was a important improvement that was made towards 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 of slow-growing deal (pine) however oak was also used in more expensive buildings as well as in some earlier examples. It is important to maintain the separation bead that separates the sashes. This will prevent rattles and draughts. The sash pulleys, idler wheels and sash rollers are vital to the functioning of the window.

2. Energy efficiency

Sash windows replaced hinged cases as larger and clearer sheets became available. 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 create a watertight seal. This form of glazing gradually replaced leaded lights.

The introduction of sashes resulted in the need for a greater variety of ironmongery, including the most basic fittings, brass pulleys, lead (and later cast iron) weights, sash stoppers shutter hinges, knobs and shutters, and a range of fasteners to hold the sashes into the right place. They were often decorated with motifs, inscriptions, and engraved patterns that identified the maker.

Sash windows can be extremely energy efficient if they are maintained regularly. Without this maintenance they can get draughty. Draughts can also result from the degeneration of putty and paint. This can be corrected using wood-to-timber repair products that are specifically designed for this purpose.

The replacement window repair specialists industry relies on the belief that older windows are old and beyond repair, whereas they can be easily maintained with just a little care. However, these repairs are costly and can cause considerable disruption to the home. Many homeowners opt to replace their windows using PVC-u from a huge "one-stop shop" installation company. They can replace all windows in a house in a single day, saving time and avoiding the need for multiple tradesmen to coordinate. They can also be fitted with 'energy saving' double-glazing to get more energy efficient ratings than are possible with traditional windows made of sash. However double-glazed windows cannot duplicate the proportions and section of historic timber sashes.

3. Security

It is possible to secure windows that are traditional without compromising on their aesthetics. A variety of ironmongery types can be fitted with sash chains, mortice bolts, and sash locks. These can be installed in a manner that the window is able to be opened for ventilation and cleaning. These windows are typically discrete since they are made to be used in conjunction with sash windows. They can be used in conjunction with traditional sash window catch. They should be replaced by more robust versions, such as those that incorporate double screws, or sprung levers in order to reduce the risk of being struck by hammers.

Sash-window frames were constructed from slow grown deal or, in the more elegant homes they were made from oak. If glazing bars have survived, they should be kept, and where possible, the timber of the cill should be replaced by identical wood. Many PVC-U firms offer a one-stop shop installation service. They can remove and replace windows on an entire house in just one day, without involving other tradespeople.

4. Ventilation

When sash windows first introduced in the 17th century, they allowed a substantial amount of light to flood into 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 produced. The result was a much more streamlined appearance, and windows with a higher level of elegance than they had before.

Sash windows were introduced and required a new range ironmongery. Early pulleys were made from wood, while later Victorian ones could be made of brass or a combination of lead and wood and there were various types of shutter hinges and knobs. The ironmongery pieces need to be cleaned and preserved to appreciate their fine design.

Timber windows require regular maintenance to ensure they remain in good shape. Lack of attention to them regularly can lead to:

sashes that no longer slide easily.

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

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

In the I920s and the I930s steel casement windows increased in popularity due to their durability slim and inexpensive, and complemented the vogue for healthy living. Research has shown that softwood sash window are just as efficient as PVC-u windows, and may even be more attractive.

The window replacement industry was able to convince homeowners that their old windows were rotten and drafty. They were also beyond the budget for repair. However, many older windows made of wood are in good condition and, with minor repairs, could easily be repaired for many years to come.

5. Maintenance

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

Moisture penetration is a frequent cause of damage to windows made of timber. This can be prevented with thorough painting, periodic repairs and elimination of the source of dampness. The paint can be removed to reveal the soft, rotting wood. Any rotten timber sections must be removed and the affected area carefully cut or pieced with replacements made of the same type of wood as those remaining. This method of repair increases the amount of fabric left, and is among the least invasive methods of treating decay caused by timber.

A resin-based wood condenser is a viable alternative to traditional staining or sanding. The product is brushed on to the surface of the timber to help stabilize it and shield it from further damage. It is especially beneficial for the treatment of sash and pulley cords, where it can prevent breakage.

It is essential that any historic ironmongery such as sash stays and latches be kept and restored instead of replaced. It can be difficult to replace these items without altering their original design. It is recommended that the use of modern aluminum fittings, such as chain stays and sash lifts should be avoided if feasible as they could cause corrosion and deterioration of frames and sashes made of timber.