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Maintaining Timber Windows

A well-maintained wooden window is an essential component of a historical building. It reflects in varying degree the technology and materials of the time in which it was constructed, as well as the design and craftsmanship.

When repairs are feasible to existing windows should be done in-situ. Repairing the most deteriorated areas of decay is possible by using specialized resin-based systems.

Durability

The windows made of wood in many historical buildings were built to last for hundreds of years. However, they need to be maintained to ensure that they look good and functioning correctly. Maintenance tasks include repairs to sash cords as well as tightening the sash pulleys and painting. The demand for enhancing windows made of timber to increase efficiency and energy efficiency is also increasing. This may mean replacing old glass units, fixing existing window rebates or putting in new cills for improved air sealing.

The deterioration of paintwork is a major problem with traditional windows. This is particularly true when sash windows are involved as the gaps between sashes can be extremely large. In these cases water can enter the paint film and cause rotting to the wood or putty underneath. The rotting may be further aggravated due to weather conditions that are poor. To stop this from happening, windows need to be painted regularly with an exterior wood paint.

Corroded areas should be repaired with a resin-based product. This will ensure the maximum amount of original fabric preserved. It is crucial to reduce the number of holes that are drilled into the frame in order to allow cable entry because they could let in moisture and cause decay.

Another significant problem with older windows is the structural movement within the wall that could cause deformation of the frame and sash. This can lead to sash no longer fitting correctly, sticking or jamming in the opening and broken glazing. This can be fixed frequently by fitting new frames for sash made of slow-growing deal (pine) or oak. The cill should be constructed of a strong hardwood like oak, to avoid differential movement between new and existing work.

To alleviate this issue to reduce the risk of this happening, there are a variety of companies that manufacture Boston pattern wooden sash that can be fitted into most openings. These sash come in various sizes and finishes that suit the needs of modern homeowners. These new sash, when combined with quadruple draft strips and a better thermal insulation, can make a significant difference to the efficiency of your home's energy usage.

Aesthetics

Many old timber windows have a high aesthetic value since they usually demonstrate, in a way the materials and technologies and architectural taste of the time in which they originate. They could also have a significant historical significance in their individual cases. This is especially true of early windows that were not glazed in timber framed buildings which were merely a series of openings within the frame, which were divided horizontally into mullions and wood or iron bars to deter invaders.

It is crucial to maintain the appearance of traditional wooden window joinery. When you spot any decay caused by the penetration of moisture it is essential to stop it. It is recommended to do this through thorough painting, particularly if there has been damage or degradation. It is best to choose paints that are intended to be used in a system (primer undercoat and finish) and follow the manufacturer’s recommendations for preparation and number coats at each stage.

Wet rot is a frequent problem for old timber windows. The best method to stop it from becoming a problem is to take out sections that are damaged or rotten as soon as you can to stop the spread of the fungus that causes it. The replacement of wood that is rotting must be done with care with a slow-growing deal (pine) and, if feasible it is the same species as which is being removed in order to prevent shifting between the new and old timbers.

Glass became cheaper and more abundant during the late medieval period and into the 17th century. In the process, the glazed openings in timber-framed homes became more complex with moulded mullions, tracery made of wood and cills that protruded deep. In recent years, glass was fixed to rebated frames with glazing sprigs instead of 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 the windows than would otherwise be possible without the need for leaded lights.

Energy efficiency

The traditional timber windows are energy efficient because of their thickness and multilayer construction, as well as their care for particulars. They also have large glass areas and projection cills which reduce air infiltration. The windows can be made to improve their energy efficiency through draughtproofing and secondary glazing. It is crucial to keep in mind that these measures should be considered when it comes to the overall appearance and integrity of the original windows.

It is sensible to fix or upgrade historic windows rather than replace them, especially when the improvement in thermal efficiency can be made through simple repairs. The windows of the past often have a historical value that shows a variety of technological advances and changes in architectural taste. The pressure to replace these windows are typically based on the assumption that the windows of the past will require replacement in the near future, but the majority of them are in a position to last for 150, 200 or even 250 years if properly maintained.

It is essential to understand that the decay issues that are that are typical of timber windows can be avoided through regular maintenance and timely upvc Repairs. It is also important to spot damp issues and correct them swiftly in order to avoid major damage. The early deterioration of paint is a major issue, because it allows moisture to penetrate the wood and cause wet rot. It is not uncommon for this issue to go unnoticed until paintwork starts to crack or turn wavier. However, it can cause structural damage and lead to further decay.

A quality paint will block moisture penetration. To avoid condensation and mould, it is important to keep the paintwork as clean as you can. Modern synthetic paints pose a challenge since they are usually water-resistant, and can cause mildew growth in the window frame.

The majority of windows from the past were constructed from sapwood-rich timber. These timbers deteriorate quickly if exposed to rain, but they can be protected with 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 have various types of timber sash which can be made to fit the historic openings. They can be constructed according to the standard Boston pattern dimensions or to specific sizes that are in keeping with the historic architecture.

Maintenance

Regular inspection as well as careful redecoration and prompt repairs can extend the life of timber windows. The most common reason for the decay is moisture infiltration through the deterioration of paint and putty. This can be avoided by thorough painting and using a good quality wood preservative.

It is important that repairs to old sash or aluminium casement windows cambridge windows are done correctly and completed with minimal disruption. It is possible to fix the majority of traditional wooden window designs without removing the frame. This should be done as often as is feasible. Remove loose or peeling paint and then lightly sand the surface to improve the "key" of the surface. This will allow the new coating to stick better. It is important to avoid stripping old paint layers which could have historical value and if they are present, it is recommended that a paint analysis be carried out.

If a portion of wood is rotting the best option is to remove it and replace it with timber inserts shaped to match the existing profiles. The inserted timber should also be treated using wood preservative and the junction between masonry sub-cill and timber double glazed windows cambridge cill should be sealed.

Replacement of windows made of traditional PVC-u may be an attractive option, especially when the installer offers a 'one stop shop' installation that takes care of both removal and replacement within one day. It is essential that installers of replacement windows are aware of the history and design of traditional timber frames. This will enable them to make appropriate recommendations for energy-efficiency improvements and other technological upgrades that won't harm the character of an historic building. Anyone who installs replacement windows must be registered under a Competent Persons Scheme such as FENSA. This will ensure that the replacements are deemed as a suitable option under Building Regulations. A skilled carpenter is able to install PVC-u Windows that are sympathetic to original building's character. This is particularly true where windows are installed in listed buildings and conservation areas.