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Maintaining Timber Windows

A well-maintained and maintained timber window is an important element of the historic structure of a building. It is a representation of the materials and technologies design, craftsmanship and aesthetics of the time period from which it dates.

If it is possible, repairs must be done in-situ. Repairing the worst areas of decay is possible by using specialized resin-based systems.

Durability

Timber windows were designed to last for hundreds of years. However, they do need to be maintained to ensure they look good and operating properly. The most frequent maintenance tasks are repairs to sash-cords and re-tightening the sash pulleys and painting. The demand for enhancing timber windows to increase efficiency and energy efficiency is also increasing. This may mean replacing old glazing units, fixing existing window rebates or putting up new cills for better air sealing.

The corrosion of paintwork is a major problem with traditional windows. This is especially important where windows made of sash are involved because the gaps between the sashes can be quite large. In these instances, water can penetrate the paint film and cause decay of the putty and the wood beneath. The rotting can be exacerbated by poor weather conditions. To prevent this, windows should be regularly painted with a suitable exterior wood paint.

The areas that are damaged should be repaired using a resin-based product. This will ensure that the highest possible amount of the original fabric remains. It is also necessary to reduce the number of holes that are drilled into the frame for cable entry since these could admit water and lead to decay.

Another significant problem with older windows is the structural movement within the wall that can lead to deformation of the frame and the sash. This can lead to sash no longer fitting correctly, sticking or jamming in the opening and cracked glazing. This can often be fixed by the fitting of new sash boxes made from slow grown deal (pine) or oak. The cill should be constructed from durable hardwood such as oak to prevent movement between the old and new work.

There are a variety of companies that make Boston pattern wooden window repair sash that fit into the majority of existing openings. The sash is available in a variety of sizes and finishes that fit the needs of modern homeowners. Combined with quadruple draught strips and a better thermal insulation, these sashes can make a an enormous difference to the energy efficiency of a house.

Aesthetics

Many old timber frames have a high aesthetic appeal, since they reflect, in some shape, the materials technology, the construction process, and the architectural style of the time they were constructed. They could have significant historical significance in their own right. This is particularly true for early unglazed windows in timber-framed buildings, where the majority were series openings in structural frames subdivided horizontally by mullions with vertical iron or wood bars in order to protect against intrusions.

Traditional window joinery made from timber is a beautiful aspect of a building, and is crucial to keep its appearance. When you spot any signs of decay due to the penetration of moisture, it is important to stop it. This is best accomplished by painting thoroughly, especially in areas where there has already been damage or deterioration. It is best to use paints designed to be used in a set (primer undercoat and finish), and to follow the manufacturer’s recommendations for preparation and number of coats at each stage.

The fungus responsible for wet rot can spread quickly in old timber wooden windows and doors cambridge. To prevent this from happening, remove any rotten or damaged parts as quickly as you can. Replace the wood that is rotting with slow-growing deal (pine) and, should it be possible, the same kind of timber as the one that is being removed, to avoid differential movement.

Glass became less expensive and more abundant during the late medieval period and into the 17th century. This led to the glazed openings in timber-framed homes were more elaborate, with moulded mullions, tracery made of wood and deep projecting cills. In the past, more often, the glass was placed within frames with rebates and pinned in with 'glazing sprigs', rather than into lead cames. This method of glazing is not only less prone to leaking but it also allows more expansive and clearer sheets of glass to be used in windows than would otherwise be possible without the need for leaded lights.

Energy efficiency

The traditional timber windows are energy efficient due to their thickness and multilayer construction as well as care for detail. The large glass surfaces, the deep projection cills and wide glazing areas help to reduce air infiltration. With secondary glazing and draughtproofing, windows can be upgraded to improve their energy efficiency. It is crucial to remember that these measures should be considered in relation to the overall appearance and integrity of the original windows.

It is sensible to repair or upgrade existing windows that are older rather than replacing them, especially when the improvement in thermal efficiency can be achieved through simple repairs. Historic windows are often of historical significance, since they reflect a variety of technological advancement and changes in architectural style. Most people assume that these windows will need to be replaced in the near future. However, they are still in service for 150,200, and even 250 years if you take care of maintenance.

It is important to recognise that the decay problems caused by traditional timber windows can be avoided by thorough maintenance and swift repairs. It is also crucial to identify damp problems and correct them swiftly in order to avoid major damage. The early deterioration of paint is a concern because it allows moisture to penetrate into the wood, causing wet rot. It is not uncommon for this issue to go unnoticed until the paintwork begins to crack or becomes curly. However, it could cause structural damage and lead to further decay.

A good paint will block moisture penetration. It is also important to keep the paintwork clean in order to prevent mould and condensation. Modern synthetic paints pose a problem because they are often water-resistant and can cause mildew to grow within the window frame.

The majority of windows from the past were constructed from timber with the majority of sapwood. The timbers will deteriorate quickly when exposed to wet weather, but can be preserved with a thorough preservative treatment before they are put to use. It is also important to ensure that the kind of timber used is well-suited to the climate and site conditions, as these elements affect the durability of the joinery. Local window manufacturers produce a variety of timber sash that can be tailored to fit specific historic openings. They can be made in the standard Boston pattern or in custom sizes to fit the architectural style of historic structures.

Maintenance

The lifespan of windows made of timber can be extended significantly through regular inspections, careful redecoration and timely repair. The main cause of decay is moisture penetration through deteriorated paint and putty. This can be avoided by using a quality wood preservative and painting the wood thoroughly.

Repairs to old sash windows and frameless casement windows must be done with care and with the least amount of disruption. Many of the traditional designs for timber windows can be repaired without dismantling the frame, and this method should be followed whenever feasible. Remove any peeling or loose paint and lightly sand the surface to improve the 'key" of the surface. This will enable the new coating to stick better. Care should be taken to avoid stripping old paint layers that could have historical value and if they are present it is recommended that a paint analysis be conducted.

When a piece of wood has become rotten the best option is to eliminate the rotten material and replace it with spliced-in inserts that are shaped to match the existing profiles. The wood that is being inserted should be treated with a wood preservative, and the junction between the cill for timber and the masonry sub-cill should be sealed.

It can be tempting to replace traditional windows with PVC U, particularly when the installer offers an 'all-in-one' installation which includes removal and cambridge replacement windows within a single day. It is important that the installers of replacement windows are aware of the history and design of traditional timber frames. This will allow them to make the appropriate suggestions for improvements to energy efficiency and other technical upgrades that do not alter the historic character of a building. The window installers who provide replacement windows must be registered with a Competent Persons Scheme like FENSA. This will ensure that replacement windows are deemed to be approved by the Building Regulations as a suitable option. It is certainly possible for a skilled and experienced carpenter to install PVC-U windows that fit the character of the building originally. This is especially true when wooden windows cambridge are situated in listed buildings and conservation areas.