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. However, sash windows may get stuck and be difficult to open or close. This is usually due to moisture which can cause the timber to expand.
Traditionally, window boxes utilized chains, cotton cords or lead weights to operate. Modern windows with sash springs are concealed to solve this problem.
1. Aesthetics
In contrast to PVC-u windows, which are constructed according to the modular imperial size Timber sash windows can be restored to their original dimensions. This permits the re-installation of timber sash windows in order to meet the current energy requirements and conform to conservation area regulations. It also offers a
window maintenance with a far superior appearance than the uPVC alternatives.
Sliding windows with sash were initially only used for large buildings or public buildings. However, this changed when production became less expensive and craftsmen could produce larger frames with more glass. In the 18th century, Sash windows were the most popular
wooden sliding doors Cambridge style in a majority of British properties. Because they were simple to open, sash windows let light into rooms without curtains.
The early windows were made of glass that was plain however, in the 17th century the sash windows began to become more attractive. They began with colored glazing bars, also known as mullions. They were expensive initially, but as glass production became less expensive and more efficient, they were commonplace in many historic homes.
In the 19th century, it was possible to manufacture large, strong glass that did not require support bars. This allowed the frame to be enlarged, which in turn gave a better view. This was a significant improvement.
Another important improvement was the introduction of the
double glazing seal repairs-hung sliding windows at the end of the I920s and beginning of I930s. The double-hung sliding sash is another significant improvement that came about at the end of the I920s, and at the beginning of the I930s.
The most common type of sash is constructed from slow grown deal (pine) but oak was used in the more luxurious buildings and in some earlier examples. It is essential to keep the separation bead that divides the sashes. This will prevent rattles and draughts. The idler wheels, sash pulleys and sash rollers are also essential to the operation of the window.
2. Energy efficiency
Sash windows were replaced by hinged casements as larger and clearer sheets were made available. They were made of 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 type of glazing gradually replaced the use of leaded lights.
The introduction of sashes led to a need for a much larger variety 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 used to keep the sashes in the right place. These were often decorated with motifs, inscriptions or engravings that identified the maker.
Sash windows can be very energy-efficient with regular maintenance. If they are not maintained they could become drafty. Putty and paint can cause draughts too. This can be remedied by using wood-to-timber repair products that are specifically designed for this purpose.
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 little attention. However, repairs to these windows 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 house 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. However these double-glazed units are unable to replicate the section and proportions of the sashes made of timber from the past.
3. Security
It is possible to secure traditional windows without compromising on their aesthetics. A variety of ironmongery types can be fitted with sash chains, mortice bolts and sash locks. They can be positioned in such a way that the
window repairs near me can be opened for ventilation and cleaning. These are typically not noticeable, since they are designed to match the sash window. They can be used alongside traditional sash window catches and must be replaced by more robust models (such as those incorporating double screws) or sprung levers to reduce the chance of them being hammered open.
Sash-window frames are typically made from oak or slow-grown deal. If glazing bars have survived, they should be kept and where it is possible, the timber of the cill should be replaced by the same wood. Many PVC-U firms provide a one-stop shop installation service. They can remove and replace windows throughout a home in a single day, without the need to involve 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 adapted to allow more light into rooms, and bigger glazing panes started to be made. The result was a lighter appearance and windows with more elegance.
Sash windows were introduced that required a brand new range ironmongery. Early pulleys were made from wood, whereas 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. The ironmongery components should be retained and cleaned down so that the quality of their design can be appreciated.
To ensure they remain in good condition, wooden windows need to be maintained. Inattention to maintenance routinely could result in:
sashes that no longer slide easily.
holes in the frame that admit 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 I930s steel casement windows gained popularity due to their strength, slim and cheap and also matched the fashion for healthy living. However, research has shown that traditional softwood sash windows are just as thermally efficient as double-glazed windows made of PVC-u, and may be more appealing than the modern sleek design of casement windows.
The replacement window industry has made a significant effort to persuade house owners that their traditional windows are old, dirty, and beyond repair. The truth is that a lot of older timber windows are in good condition and with minor repairs could easily be repaired for many years to come.
5. Maintenance
A traditional sash
window doctor needs regular maintenance and inspection. If you do not maintain your sash window, it can result in the sash cords breaking, and the glazing bars deteriorating excessively. It can also cause the paint and putty to degrade. The removal of sashes may also cause structural movement in the frame, causing the sash not to close correctly. The sash could also get stuck in the open position, which allows water and draughts into the building.
Moisture penetration is the most common cause of damage to timber windows. This can be prevented by thorough painting, regular repairs and elimination of the cause of dampness. Wet rot is recognisable due to the wavy appearance of the existing paint which can be stripped to reveal rotting, soft timber. Any rotten timber sections should be cut off and the affected part carefully scarfed or pieced in using replacements made of the same kind of timber as those remaining. This repair method increases the amount of fabric that was originally used and is one of most non-invasive methods to treat timber-to-timber rot.
The use of a resin-based wood consolidant is a different option to the traditional method of sanding and staining. This is brushed on the surface of the wood to protect it and stabilize it. It is especially beneficial for the treatment of sash and pulley cords, which can help prevent breakage.
It is essential that any old ironmongery like sash stays and latches be kept and restored instead of replacing them. It can be difficult to replace these items without compromising their original design. It is also advised that fittings made of aluminum like sashlifts, as well as chainstays, are avoided since they can cause deterioration and corrosion of timber frames and sashes.