So , You've Bought Sash Windows Cambridge ... Now What?
How to Restore Timber Sash Windows in Cambridge
Many homes in Cambridge have traditional sash windows and the 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.
Box sash windows were historically operated using chains, cotton cords and lead weights. Modern sash windows come with hidden springs to address this problem.
1. Aesthetics
In contrast to PVC-u windows, which are manufactured according to the modular imperial size the timber sash windows are able to be restored to their original dimensions. This allows the restoration of timber sash windows in order to meet current energy requirements and conform to conservation regulations for areas. It also comes with windows that are superior to uPVC alternatives.
Sliding windows with sash were initially only used in large buildings or public buildings. However the production became more affordable and artisans could create larger frames using larger glass. By the end of the 18th century, sash windows were the most popular wooden style in British homes. Since they were easy to open, sash windows let light into rooms without curtains.
The early windows were made of plain glass However, by the 17th Century, sash windows began to become more ornamental. They started with coloured glazing bars, also known as mullions. These windows were quite expensive at the time, but as glass production became more efficient and less expensive, they became a part of numerous period houses.
In the 19th century, it was possible to make large, sturdy glass that didn't require supporting bars. This allowed the frame size to be enlarged further, which allowed for a wider view from the window. This was a significant advancement.
The introduction of the double-hung sliding sash was a significant improvement that came about at the end of the I920s and at the beginning of the I930s. This allowed both the upper and lower sash to be opened simultaneously and also improved the ventilation of the building.
Oak was used for older and more luxurious buildings. It is crucial to maintain the parting bead which is used to separate the sashes. This will help prevent draughts and rattles. It is also important that the idler and sash pulley wheels are in good shape as they help to operate the window.
2. Energy efficiency
As larger and clearer glass sheets were made available, sash windows started replacing hinged casements. They were made of plate glass, placed within timber frames with rebates and then pinned with glazing sprigs, with putty on both sides to create a watertight seal. This kind of glazing gradually replaced the leaded light bulbs.
Sashes were introduced, which resulted in a greater demand for ironmongery. The basic fittings included brass pulleys (and later cast-iron) weights as well as sash stoppers shutter hinges, handles and shutter hinges as well as a variety of fasteners to secure the sashes. These were usually decorated with designs, inscriptions, and engravings to identify the maker.
With regular maintenance, sash windows are very energy efficient. However, without this maintenance they can become drafty and let in cold air. Draughts can also be caused by the breakdown of paint and putty. You can fix this problem with wood-to-timber products.
The replacement window industry relies on the belief that old windows are damaged and beyond repair, whereas they can be easily maintained with a bit of care. However, repairs to these windows are costly and can cause considerable disruption to the home. To prevent this, many homeowners prefer to replace their windows with PVC-u windows made by one of the many "one-stop shop" installation companies. They can replace all windows in a home in one day, saving time and eliminating the need for multiple tradesmen to coordinate. They are also available with 'energy saving' double-glazing to get more energy efficient ratings than traditional windows made of sash. However these double-glazed units are unable to duplicate the proportions and section of historic timber sashes.
3. Security
Traditional windows can be secured without compromising their aesthetics. Ironmongery, such as sash chain, mortice bolts and sash locks can be put in place. They can be positioned in such a way that the window can still be open for ventilation and cleaning. These are typically unobtrusive, as they are designed to complement the sash window. They can be used with traditional sash window catch. These should be replaced with more robust versions like ones that have double screws, or sprung levers to decrease the risk of being hit with hammers.
Sash-window frames were typically constructed from slow grown deal or, in the more luxurious homes they were made from oak. If the glazing bars remain intact, they should be retained. Where feasible, the cills made of timber should be replaced with wood that matches. Many PVC-U companies offer a one-stop installation service. They can remove and replace windows on a complete home in one day, without involving any other tradespeople.
4. Ventilation
Sash windows were introduced in the 17th century and allowed for a large amount of light to be absorbed into buildings. By the end 18th century, they were modified to allow more light could be let into the rooms. Larger glass panes were also created. The result was a more streamlined appearance, and windows with a greater level of elegance than they had before.
The introduction of sash windows also required an entirely new range of ironmongery. Early pulleys could be made out of wood. Later Victorian ones were made of brass or a mix of wood and leaded. There were also various kinds of shutter hinges and knobs. www.repairmywindowsanddoors.co.uk should always be kept and cleaned to ensure that the exquisite quality of their design can be appreciated.
To keep them in good condition, timber windows must be maintained. Inattention to maintenance can lead to:
Sashes that do not move effortlessly.
Holes in the frame which allow water to enter and cause decay and damage.
break down of the putty and allow water penetration that could cause decay in the frame and cill.
In the I920s and I930s, steel casement windows increased in popularity due to their durability, slim and cheap and also matched the fashion for healthy living. Studies have shown that softwood sash window are just as efficient as PVC-u windows and can even be more attractive.
The industry of replacement windows has done a lot to convince homeowners that their traditional windows are dirty, noisy and beyond economic repair. The reality is that many old timber windows are in good condition and, with minor repairs, could easily be serviceable for many years to come.
5. Maintenance
A traditional sash window requires regular maintenance and inspection. If you fail to maintain your sash window, it could cause the sash cords breaking, and the glazing bars deteriorating excessively. It could also cause paint and putty degrade. The removal of sashes can also result in structural movement within the frame that causes the sash to move out of alignment and in a position that it is not able to close properly. The sash could also get stuck in its open position, allowing the water and drafts to 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 removing the cause of dampness. The paint can be removed to expose the soft, decaying wood. The sections of timber that are rotten must be removed with care and the affected area should be scarfed together or pieced together using replacements of the same nature as the rest of the timber. This method of repair increases the amount of original fabric that is left and is one of the least invasive methods for treating decay caused by timber.
The use of a resin-based wood consolidant is an alternative to traditional sanding and staining. The product is brushed on the surface of the wood to protect it and stabilise it. It is especially beneficial to treat pulley cords and sash which can help prevent breakage.
It is crucial that any old ironmongery such as sash stays and latches are retained and rehabilitated instead of being replacing them. They can be extremely difficult to replace without harming the quality of the original design. It is also recommended that modern fittings made of aluminium like sashlifts and chainstays, be avoided as they can cause deterioration and corrosion of timber frames and sashes.