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How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge have sash windows with traditional designs and homeowners are proud of how they appear. Sash windows can get stuck and become difficult to open and close. This is usually due to moisture which can cause the wood to expand.

Traditionally, windows made of box sash used chains or cotton cord and weights made of lead to operate. Modern sash windows feature hidden springs to address this problem.

1. Aesthetics

Contrary to PVC-u windows which are constructed according to imperial sizes that are modular, timber sash windows can be restored to their original size. This lets the restoration be in line with modern energy requirements while still complying with conservation regulations for the area. It also offers a window that is far superior to upvc door handle repairs near me options.

Sliding sash windows were originally only found in large buildings or public buildings, though the production process became less expensive and craftsmen could produce larger frames with more glass. At the end of the 18th century, sash windows were the most sought-after wooden style in British homes. As they were easy to open, sash windows let light into rooms without curtains.

The early windows were made of plain glass, but in the 17th century, sash windows began to become more ornamental. They started with coloured glazing bars, also known as mullions. These were very expensive at the time, but as glass production improved and less expensive, they became a feature of numerous period houses.

In the 19th century, it was possible to create large, sturdy glass that did not need support bars. This allowed for the frame to be enlarged, which in turn gave an improved view. This was a significant innovation.

The introduction of the double-hung sliding sash is another significant improvement that came about at 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 the building.

The most common type of sash is constructed from slow-growing deal (pine) however oak was utilized in more expensive buildings as well as in some earlier examples. A parting bead is used to separate the two sashes. It is essential that it is maintained to prevent rattles and draughts. It is also essential that the idler and sash pulley wheels are in good shape as they help to operate the window.

2. Energy efficiency

Sash windows replaced hinged casements as larger and clearer sheets were made available. They were coated with plate glass that was placed within 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 led lights.

The introduction of sashes led to the need for a wider range of ironmongery, including the most basic fittings, brass pulleys and lead (and later cast iron) weights, sash stops, shutter hinges and knobs, and a range of fasteners to hold the sashes in the right place. These were often decorated with motifs, inscriptions or designs that were engraved to identify the maker.

Sash windows are energy efficient when they are maintained regularly. Without this maintenance, they can become drafty. Putty and paint can cause draughts. You can fix this problem with wood-to-timber products.

The replacement window industry relies on the assumption that traditional windows are rotten and beyond repair, while they can be easily maintained with a little attention. However, these repairs can be expensive and involve considerable disruption to the home. Many homeowners opt to replace their windows using PVC-u from a large 'one-stop shop' installation company. They can replace all windows in a home in one day, thereby saving time and avoiding the need for various tradesmen to coordinate. These windows can be fitted with energy-saving double glazing to get higher energy ratings than the traditional windows made of sash. These double-glazed windows aren't capable of resembling the proportions and section of sashes from old timber.

3. Security

It is possible to secure traditional windows without compromising their appearance. Many types of ironmongery can be fitted with sash chains, mortice bolts and sash locks. They can be positioned in a manner that the window can be opened to allow ventilation and cleaning. They are generally minimal in appearance, as they are designed to complement the sash window doctor near me. They can be used alongside traditional sash-window catchers and must be replaced by more robust versions (such ones that have double screws) or spring levers to decrease the possibility of them being hammered out.

Sash-window frames are usually made from oak or slow-grown deal. If the glazing bars remain in good condition and in good condition, they should be kept. Where feasible, the cills made of timber should be replaced by wood that matches. PVC-u companies typically provide a one-stop shop installation service, removing and replacing windows on an entire house in a day without the need to involve 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. By the end of the 18th century they were altered to allow even more light into rooms, and bigger glazing panes started to be made. The result was a lighter appearance, and windows with a higher level of elegance than they had before.

Sash windows were introduced and required a new type of ironmongery. Early pulleys were made from wood, whereas later Victorian ones were made from brass or a combination of lead and wood and there were a variety of shutter hinges and knobs. The ironmongery pieces need to be kept clean and preserved in order to appreciate their exquisite design.

To ensure they remain in good shape, timber windows must be maintained. A lack of attention to them regularly could result in:

Sashes that no longer slide smoothly.

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

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

In the I920s and I930s, steel casement windows grew in popularity because they were strong slim and inexpensive and also matched the fashion for healthy living. However, research has proven that traditional softwood sash windows are as efficient thermally as double-glazed PVC-u windows and may be more appealing than the modern sleek design of casement windows.

The replacement window industry has made a significant effort to convince homeowners that their windows are rotten, draughty and beyond economic repair. The truth is that a lot of older windows made of wood are in good condition and with minor repairs can easily be repaired for many years to be.

5. Maintenance

The traditional sash windows require regular maintenance and inspection. Failure to do this can lead to sash cords breaking, excessive wear on the glazing bars and deterioration of paint and putty. The removal of the sashes could also result in structural movement within the frame that causes the sash to be misaligned and unable to close correctly. It is also possible for the sash to be snagged or fixed in the open position, which can let water and draughts into the property.

Damage to timber windows is often caused by water entry. This can be prevented by thorough painting, periodic upvc repairs and elimination of the source of dampness. Wet rot is easily identified by the wavy appearance of the paint that can be stripped to reveal rotting, soft timber. Any timber that is rotting should be cut off and the affected area should be carefully wrapped or pieced back using replacements made of the same kind of timber as the ones remaining. This method of repair maximizes the amount of original fabric retained and is among the least invasive ways of treating timber-to-timber decay.

The use of a wood consolidant made from resin is a different option to traditional sanding and staining. It is brushed onto the surface of the wood to protect it and stabilise it. It is particularly beneficial in the treatment of pulleys and sash cords where it can help to prevent breakage.

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