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Maintaining Timber Windows

A well-maintained window made of timber is a significant part of the historic structure of a building. It illustrates in varying degrees the different materials and technologies design, craftsmanship and aesthetics of the time period from which it originates.

Whenever possible repairs to existing windows should be carried out in-situ. Repairing the worst areas of decay can be accomplished by using specialized resin-based systems.

Durability

The windows made of timber in many historical buildings were made to last for hundreds of years. They do require some maintenance to keep them looking good. The most frequent maintenance tasks include repairs to sash cords, re-tightening sash pulleys, and painting. The need to upgrade timber windows in order to improve efficiency and energy efficiency is also increasing. This can involve replacing old glass units, repairing existing tailored Window repair rebates or putting in new cills that allow the air to seal better.

The deterioration of paintwork is a major problem with traditional windows. This is particularly important when it comes to sash windows as the gaps between sashes can often be quite large. In these cases water can get into paint film and cause rotting to the wood or putty underneath. The rotting can be exacerbated by poor weather conditions. To prevent this from happening, windows should be regularly painted with an exterior wood paint.

Corroded areas should be repaired with resin-based products. This will ensure that the best possible amount of the original fabric is retained. It is also important to reduce the number of holes that are drilled into the frame for cable entry, as they could allow water in and cause decay.

Another significant problem with older windows is the structural movement within the wall which can lead to deformation of the frame and the sash. This can result in sash no longer fitting correctly or sticking or jamming into the opening and broken glazing. This can be corrected often by fitting new sash frames made of slow-growing deal (pine) or oak. The cill should be constructed of a strong hardwood such as oak, in order to prevent any shifting between the new and old work.

There are a variety of companies that produce Boston pattern wooden sash that fit in with the majority of openings. These sash come in a variety of sizes and finishes to suit the needs of modern homeowners. These new sash, when coupled with quadruple draft strips and improved thermal insulation can significantly improve the efficiency of your home's energy usage.

Aesthetics

Many old wooden windows have an excellent aesthetic value because they typically demonstrate, in a way, the materials and technology and architectural taste of the time in which they date. They could have significant historical significance in their own right. This is particularly true of early windows that were not glazed in timber-framed buildings, where the majority were simply a series of openings within structural frames subdivided horizontally by mullions with vertical iron or wood bars in order to keep out intrusions.

Traditional window joinery made of timber can be a highly decorative aspect of a building, and is essential to maintain its appearance. As soon as you notice any signs of decay caused by water penetration it is essential to stop it. It is recommended to do this through thorough painting, especially where there is damage or deterioration. It is recommended to use paints that are specifically designed to be used as part of the system (primer, undercoat and finish) and to follow the manufacturer's recommendations in relation to preparation and the amount of coats required at each stage.

The fungus that causes wet rot can quickly spread in old windows made of wood. To prevent this, remove any damaged or rotten components as promptly as you are able to. Replace the wood that is rotting with slow-growing deal (pine), and if possible, the same kind of timber that is being removed, to prevent differential movement.

In the late medieval and 17th century periods glass became less expensive and more abundant, so that the glazed openings in timber-framed buildings gradually became sophisticated with wooden tracery as well as moulded mullions and projecting cills. In recent years, glass was fixed into rebated frames with glazing sprigs, not lead cames. This method of glazing not only makes windows less likely to leak and also allows larger sheets of glass to be used than would have been possible otherwise without the use of led lights.

Energy efficiency

Traditional timber windows provide a good energy performance due to their thickness and multi-layer construction, as well as attentive attention to detail. The large glass areas, deep projecting cills, and the large double glazing near me areas help to reduce air infiltration. With secondary glazing and draught proofing, windows can be upgraded to improve their energy efficiency. However it is essential to remember that such measures should be evaluated in relation to the overall quality and appearance of the original window.

It is logical to fix or upgrade historic windows rather than replace them, particularly when improvement in thermal efficiency can be achieved by simple repairs. The windows that are historic have a lot considered to be of historical value because they reflect a variety of technical development and changes to architectural style. The pressures to replace such windows are usually based on the assumption that the old windows will need replacement in the near future, however most are still capable of serving for 150, 200 and even 250 years if they are properly maintained.

It is essential to realize that decay problems in traditional timber windows are avoidable with quick and thorough repairs. Additionally, it is essential to identify damp penetration problems and to remedy them quickly to avoid major damage. The early deterioration of paint could be a problem as it allows moisture to penetrate into the wood, causing wet rot. It is not uncommon for this damage to go unnoticed until the paintwork begins to crack or becomes wavy. However, it can cause structural damage and then further decay.

A good quality paint will stop this moisture penetration. To avoid condensation and mould, it is important to keep the paintwork as clean as you can. Modern synthetic paints could be a problem because they are usually designed to be water-resistant and this may lead to the formation of mildew in the window frame.

The majority of older windows were constructed from sapwood-rich wood. These timbers can deteriorate quickly when exposed to rain, but they can be protected by a thorough preservation treatment before use. It is essential to select the right kind of wood for the site and climate, as these variables can affect the durability of the joinery. Local window manufacturers offer an array of sash timbers that can be adapted to fit historical openings. They can be produced in the standard Boston pattern or in custom sizes that can be adapted to historic structures.

Maintenance

Regular inspection as well as careful redecoration and prompt repairs can extend the lifespan of windows made of timber. The primary cause of wood decay is moisture leaking through the deteriorated paint and putty. This can be prevented by using a quality wood preservative and painting the wood thoroughly.

It is essential that repairs to old sash and casement windows are done correctly and completed without causing any disturbance. It is possible to ventilation repair cambridgeshire the majority of traditional wooden windows and doors cambridge window designs without taking the frame off. This should be done as often as is feasible. Paint that is peeling or loose should be removed with care and sanded lightly to improve the 'key' of the surface and allow for a better adhesion of the new coating. It is important to avoid stripping old paint layers that might have historical significance If these are present it is recommended that a study of the paint be conducted.

If a piece of timber has become rotten the best option is to take out the rotten material and replace it with spliced-in timber inserts that are shaped to fit the existing profiles. The timber that is inserted should be treated using wood preservative and the junction between masonry sub-cill and timber cill should be sealed.

Replacement of traditional windows using PVC-u can be an attractive option, especially when the installer provides an "all-in-one" installation that takes care of removal and replacement in one day. It is, however, crucial that the person who installs replacement windows has a full understanding of the construction and history of traditional timber frames. This will allow them to make the right suggestions for energy efficiency improvements and other technical upgrades that won't harm the character of a historic building. Those who provide replacement windows should be registered under a Competent Persons Scheme like as FENSA. This will ensure that the replacements are approved as a suitable option under Building Regulations. A skilled carpenter can put in PVC-u Windows that are sympathetic to the original character of the building. This is particularly true when the windows are in listed buildings or conservation areas.