The Advanced Guide To Sash Windows Cambridge
How to Restore Timber Sash Windows in Cambridge
Many homes in Cambridge feature traditional sash window and homeowners are proud of their appearance. However, sash windows may become stuck and difficult to open or close. This is usually due to moisture which can cause the timber to swell.
Box sash windows were traditionally operated using chains, cotton cords and weights made of lead. Modern windows with sash springs are concealed to solve this problem.
1. Aesthetics
Unlike PVC-u windows that are constructed according to imperial sizes that are modular, timber sash windows can be restored to their original sizes. This permits the re-installation of timber sash windows in order to comply with current energy standards and comply with conservation area regulations. It also offers a window with a far superior appearance than the uPVC alternatives.
Sliding sash window frames were initially intended for large structures or public buildings. However the production became more affordable and artisans could create larger frames using larger glass. At the close of the 18th century, sash windows had become the most sought-after wooden style in British homes. Sash windows were simple to operate and let light into rooms without the need for curtains.
Early windows were simple glass, but in the 17th century sash windows began to become more decorative with coloured glazing bars and moulded mullions. These windows were quite expensive at the time but as glass production improved and cost-effective, they were a common feature in many period houses.
In the 19th century, it was possible to make large, sturdy glasses that didn't need support bars. This allowed the frame to be made larger and, in turn, gave the viewer a better view. This was a very important innovation.
Another significant improvement was the introduction of the double-hung sliding window at the end of the I920s and beginning of I930s. This allowed both the lower and upper sash to be opened simultaneously and gave improved ventilation to buildings.
Oak was used for older examples and more prestigious buildings. It is important to maintain the parting bead that divides the sashes. This will stop draughts and rattles. The sash pulleys, idler wheels and sash rollers also are crucial to the operation of the window.
2. Energy efficiency
Sash windows replaced hinged casements as clearer and larger sheets became available. Plate glass was placed in rebated timber frames, pinned with glazing sprigs and putty was applied to the frame's two sides for watertightness. This kind of glazing gradually replaced the leaded light bulbs.
Sashes were introduced, which resulted in a greater demand for ironmongery. The most basic fittings were brass pulleys (and later cast-iron) weights and stoppers for sashes shutter hinges, handles and shutter hinges, and a variety of fasteners used to secure the sashes. These were often decorated in patterns, inscriptions and engravings to identify the maker.
With regular maintenance, sash windows can be very energy efficient. But, if you don't maintain them, they may become drafty and let in cold air. Paint and putty may also cause draughts. windows and doors cambridge can be corrected using wood-to-timber repair products that are specifically designed for this purpose.
The replacement window industry relies on the perception that older windows are old and beyond repair, whereas they can be maintained with a bit of care. However, repairs to these windows can be costly and cause substantial disruption to the home. To avoid this, many homeowners opt for a complete replacement with PVC-u windows from one the many 'one stop shop' installation companies. They can take down and replace all windows in a house within a single day, eliminating the need to coordinate multiple tradesmen and making the entire process much more efficient. They are also available with energy-saving double-glazing to get greater energy efficiency than those offered by traditional windows with sash. These double-glazed units are not able to replicate the proportions or section of historic timber sashes.
3. Security
It is possible to secure traditional windows without compromising their appearance. There are many types of ironmongery that can be installed including sash chains mortice bolts and sash locks. They can be fitted in such a way that the window is able to be opened for ventilation and cleaning. These are typically unobtrusive, as they are designed to complement the sash window. They can be used alongside traditional sash window catches that are required to be replaced with more robust models (such ones with double screws) or sprung levers to reduce the risk of them being hammered open.
Sash-window frames were made from slow-growing deal or, in the more prestigious houses, from oak. If glazing bars have survived, they should be kept, and, if possible, the timber of the cill should be replaced with the same wood. PVC-u companies often offer a one stop shop installation service, removing and replacing windows on an entire home in one day, without the need to engage other tradespeople, or coordinate visits from a number of different suppliers.
4. Ventilation
When sash windows first introduced in the 17th century they allowed a large amount of light to flood into structures. At the end of the 18th century, they were modified to allow more light could be let into rooms. Larger glass panes were also made. The result was a more light appearance and windows with more elegance.
Sash windows were introduced, which required a new range ironmongery. Early pulleys were made from wood, whereas later Victorian ones could be made from brass or a mixture of wood and lead, and there were a variety of shutter hinges and knobs. The ironmongery pieces need to be cleaned and preserved to appreciate their beautiful design.
To keep them in good condition, wooden windows must be maintained. A lack of attention to them regularly could lead to:
Sashes that do not slide easily.
Holes in the frame that allow water to enter and cause decay and damage.
break down of putty allowing water penetration that could lead to decay of the frame and cill.
In the I920s and the I930s steel casement windows grew in popularity because they were strong, slim and cheap, and complemented the vogue for healthy living. Research has shown that softwood sash windows are just as efficient as PVC-u windows and can even be more attractive.
The window replacement industry has done a lot to convince homeowners that their old windows are rotten, draughty and beyond economic repair. The reality is that many older windows made of wood are in good condition and, with minor repairs, could easily be maintained for years to be.
5. Maintenance
A traditional sash window requires regular maintenance and inspection. If you don't maintain your sash window, it could result in the sash cords breaking and the glazing bars wearing out excessively. It could also cause the paint and putty to deteriorate. The removal of sashes could also result in structural movement within the frame, which can cause the sash to not close properly. It is also possible for the sash to be snagged or fixed in an open position and let water and draughts enter the structure.
Damage to timber windows is usually caused by moisture entry. This can be prevented by regular maintenance, thorough painting and removing the source of dampness. Wet rot is recognisable by the wavy look of the existing paint which can be stripped away to reveal soft, rotting wood. The sections of timber that are rotten should be carefully cut out, and the affected area should be scarfed together or glued together using replacements of the same nature as the rest of the timber. This method of repair increases the amount of original fabric retained and is one of the least invasive ways of treating timber-to-timber decay.
A wood condenser made of resin is an alternative to traditional process of sanding or staining. The product is brushed on to the surface of the wood to help stabilize it and protect it from further damage. It is especially beneficial for the treatment of pulley cords and sash which can stop breakage.
It is essential that any old ironmongery such as sash stays and latches be kept and rehabilitated instead of being replacing them. It can be difficult to replace these items without altering their original design. It is also recommended that fittings made of aluminum like sashlifts, as well as chainstays, should be avoided since they can cause corrosion and deterioration of timber frames and sashes.