How to Restore Timber Sash Windows in Cambridge
Many homes in Cambridge have sash windows that are traditional and the homeowners are proud of their appearance. However, sash windows may get stuck and be difficult to open or close. This is often due moisture which can cause the timber to swell.
Traditionally, window boxes utilized chains, cotton cords or lead weights to operate. Modern sash windows feature hidden springs to overcome this problem.
1. Aesthetics
Contrary to PVC-u windows which are manufactured according to imperial sizes that are modular Timber sash windows can be restored to their original size. This allows the restoration to meet the current energy standards while complying with conservation areas regulations. It also offers windows with a superior appearance than the upvc doors repairs alternatives.
Sliding sash windows were originally only used in large structures or public buildings, but the production process became cheaper and craftsmen could produce larger frames with more glass. By the end of the 18th century, sash windows were the most popular wooden design in British homes. Because they were simple to open, sash windows let light into rooms without the need for curtains.
Early windows were plain glass but by the 17th century sash windows were becoming more decorative, with coloured glazing bars and moulded mullions. These windows were quite expensive at the time, but as glass production improved and cheaper they became a part of many period houses.
By the 19th century it was possible to make large, sturdy glass that did not require supporting bars. This allowed the frame to be made larger and, in turn, gave an improved view. This was an important innovation.
The introduction of the double-hung sliding sash is another significant improvement that came about towards the end of the I920s and the beginning of the I930s. This allowed both the upper and lower sash to be opened at the same time and gave improved ventilation to buildings.
The most commonly used type of sash is constructed from slow-growing deal (pine) but oak was used in the more prestigious buildings and in earlier examples. It is crucial to maintain the parting bead that divides the sashes. This will stop rattles and draughts. The sash pulleys, idler wheels and sash rollers also are essential to the functioning of the window.
2. Energy efficiency
As clearer and larger sheets of glass became available, sash window supplier cambridge began replacing hinged casements. They were coated with plate glass that was set in timber frames with rebates and pinned in place using glazing sprigs and putty on both sides to make them watertight. This form of glass gradually replaced the leaded light bulbs.
Sashes were introduced, which resulted in increased demand for ironmongery. The most common fittings included brass pulleys (and later cast-iron) weights and stoppers for sashes shutter hinges and handles as well as a variety of fasteners to fix the sashes. They were often decorated with designs, inscriptions, and engraved patterns to identify the maker.
With regular maintenance, sash windows can be very energy efficient. However, if they are not maintained, they can become draughty and let in cold air. Draughts can also result from the degeneration of putty and paint. This can be corrected using proprietary wood-to-timber repair products.
The industry of replacement windows relies heavily on the perception that old windows are beyond repair and therefore cannot be maintained economically. However windows can be easily maintained with a bit of attention. Repairs can be costly and cause lots of disruption to the home. To prevent this homeowners often opt for a complete replacement with PVC-u windows made by one of the many “one stop shop” installation companies. They can replace and remove all windows in a home within a single day, avoiding the need to coordinate different tradesmen and making the whole process much quicker. They can also be supplied with energy-saving double-glazing to achieve higher energy efficiency ratings than traditional windows with sash. However these double-glazed units are unable to replicate the section and proportions of traditional timber sashes.
3. Security
Traditional windows can be secured without compromising their appearance. There are many types of ironmongery that can be fitted with sash chains, mortice bolts, and locks for sash. These can be put in place to ensure that the window is still open to allow ventilation or for cleaning. These products are usually unobtrusive, as they are designed to complement the sash Window Seal Repairs. They can be used with traditional sash window repairs cambridge catch. They should be replaced with more robust models like ones that have double screws or sprung levers to decrease the risk of being struck by hammers.
Sash-window frames were made from slow-growing deal or, in more elegant homes made of oak. If the glazing bars are still intact and in good condition, they should be kept. If feasible, the cills made of timber should be replaced with wood that matches. 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 a number of 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 more light into rooms, and larger glazing panes began to be produced. The result was a lighter appearance and windows that were more elegant.
Sash windows were introduced that required a brand new type of ironmongery. The first pulleys were made of wood, later Victorian ones could be made from brass or a combination of lead and wood, and there were many kinds of shutter hinges and knobs. Ironmongery elements must be maintained and cleaned so that the fine quality of their design can be appreciated.
Timber windows require careful maintenance to keep them in good shape. Lack of attention to them regularly can result in:
Sashes that do not move effortlessly.
holes in the frame allow water that can cause decay and damage.
break down of putty allowing water to penetrate, which could cause decay in the frame and cill.
In the I920s and the I930s steel casement windows increased in popularity due to their strength, slim and cheap and were in line with the trend for healthy living. Research has proven that softwood sash windows are just as effective as PVC-u windows and can even be more attractive.
The replacement window industry has done a lot to persuade house owners that their windows are old, dirty, and beyond repair. The reality is that many old windows made of wood are in good condition and with minor repairs could easily be repaired for many years to come.
5. Maintenance
A traditional sash window needs regular maintenance and inspection. Inability to maintain it properly can lead to broken sash cords, excessive wear on the glazing bars, and deterioration of paint and putty. The removal of the sashes can also result in structural shifts within the frame, which causes the sash to be misaligned and not closing properly. The sash may also become stuck in its open position, allowing water and draughts into the property.
The damage to timber windows is often caused by moisture infiltration. This can be avoided with regular maintenance as well as thorough painting, and then removing the cause of dampness. The paint can be removed to expose the soft, rotting wood. Any rotten timber sections must be removed and the affected area should be carefully wrapped or pieced back using replacements made from the same kind of timber as the ones remaining. This method of repair maximises the amount of original fabric left, and is one of the least invasive methods for treating timber-to-timber decay.
A resin-based wood condenser is a viable alternative to traditional staining or sanding. It is brushed onto the surface of the wood to protect it and strengthen it. It is particularly beneficial in 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, such as stay latches and sash latches. It is difficult to replace these items without compromising their original design. It is recommended that the use of modern aluminium fittings like sash lifts and chain stays is avoided if at all possible since they can cause corrosion and deterioration of frames and sashes made of timber.