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Maintaining Timber Windows

A well-maintained wooden window is a crucial part of a historic building. It reflects, in various degrees, the materials and technologies of the time in which it was made, the architectural style and craftsmanship.

When repairs are feasible to existing windows are required, they should be made in situ. Repairing the worst areas of decay can be done using proprietary resin-based systems.

Durability

The timber windows in many historic structures were designed to last for a long time. They require regular maintenance to ensure they look good. Maintenance tasks include sash cord repairs as well as tightening the sash pulleys and painting. The need to upgrade timber windows to improve efficiency and energy efficiency is also increasing. This can involve replacing old glass units, fixing the window rebates that are in place or putting up new cills that allow for improved air sealing.

The deterioration of paintwork is a major issue with traditional windows. This is particularly true when windows made of sash are involved because the gaps between sashes can be extremely wide. In these cases, water can penetrate paint film and cause rotting to the wood or putty underneath. Weather conditions that are not ideal can accelerate the decay. To prevent this from happening, windows must be painted regularly with an exterior wood paint.

Areas that have been damaged must be repaired with a resin-based product. This will ensure that the best possible amount of the original fabric remains. It is essential to limit the number of holes that are drilled into the frame in order to allow cable entry since they can let in moisture and cause decay.

The wall's structural movement could also cause distortions in the frame as well as the sash. This can result in sash not fitting correctly and jamming or sticking into the opening, and even broken glass. Often this can be corrected through the installation of new sash boxes that have been made from slow grown deal (pine) or oak. The cill should be constructed of a durable hardwood like oak to avoid differential movement between the existing and new work.

To reduce the risk to reduce the risk of this happening, there are several companies that make Boston pattern wooden sash that will fit into the majority of existing openings. The sash is available in a range of sizes and finishes to meet the needs of the modern homeowner. Together with quadruple draught strips and improved thermal insulation, these new sash options can make a substantial difference to the energy efficiency of a house.

Aesthetics

Many old timber windows have a great aesthetic value since they usually demonstrate, in a way the materials and techniques and architectural taste of the time in when they were built. They could have significant historical significance on their own. This is especially true for windows that were unglazed in the early days of timber framed buildings where the great majority were just a collection of openings in the structural frame sub-divided horizontally into mullions and iron or wood bars to deter invaders.

It is crucial to maintain the appearance of traditional wooden window joinery. It is essential that any decay caused by moisture penetration should be removed as soon as it is recognised. This can be done by applying a thorough coat of paint, particularly in areas that have already suffered damage or degradation. It is recommended to use paints that are designed to be used in a set (primer undercoat and finish) and to adhere to the manufacturer's recommendations for preparation and number coats at each stage.

Wet rot is a common problem in old timber windows. The best method to stop it from becoming a problem is to take out any damaged or rotten sections immediately to prevent the spread of the fungus responsible for it. The replacement of rotting wood must be done with care with a slow-growing deal (pine) and, wherever feasible using the same species as that which is being removed to prevent differential movement between the new and old timbers.

In the late period of the 17th century and the middle of the medieval period, glass became cheaper and more abundant, and the openings for glazed glass in timber-framed buildings gradually became elegant with wooden tracery as well as moulded mullions and protruding cills. The glazing was increasingly set within rebated frames and pinned in with 'glazing sprigs', rather than being inserted into lead cames. This method of glazing not only makes windows less likely to leak, but also allows for more clear glass sheets to be employed than would be possible without the use of led lights.

Energy efficiency

Traditional timber windows are energy efficient due to their thickness, multilayer construction and focus on the smallest of details. They also feature large glass areas and projecting cills that minimise air infiltration. With secondary glazing and draughtproofing, the windows can be improved to improve their energy efficiency. It is essential to remember that these measures must be considered when it comes to the overall integrity and appearance of the original windows.

As a result, retaining the existing windows from the past that are in need of repair instead of replacing them is sensible particularly when thermal enhancements can be made cost-effectively through simple repairs and improvements. Older windows typically have an historic value that illustrates a variety of technological advances and changes in architectural tastes. The pressure to replace these windows are generally based on the assumption that old windows will need replacement in the near future, however they are capable of providing service for 150, 200 and even 250 years, if properly maintained.

It is essential to realize that decay issues associated with traditional timber windows are avoidable with quick and thorough repairs. It is also essential to recognize damp issues and correct them swiftly to avoid major damage. 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 damage to go unnoticed until paintwork starts to crack or turn curly. However, it can cause structural damage and lead to further decay.

A good paint will stop moisture from entering the paint. To prevent condensation and mould it is essential to keep the paintwork as clean as possible. The use of modern synthetic paints could be a problem since they are typically designed to be water-resistant and this may lead to the formation of mildew within the window frame.

The majority of windows from the past were manufactured from timber containing an extensive proportion of sapwood. The timbers will deteriorate rapidly if exposed to rain, but they can be preserved with a thorough preservation treatment before use. It is important to choose the right kind of wood for the site and the climate, since these factors will affect the durability of the joinery. Local upvc window and door repairs manufacturers provide a wide range of sash made from timber that can be adapted to fit historical openings. They can be produced in the standard Boston pattern or in custom sizes to fit historic buildings.

Maintenance

The lifespan of windows made of timber can be extended through regular inspections, careful redecoration and timely repair. The major cause of decay is moisture penetration through the deteriorated paint and putty. This can be avoided with careful painting and using high-quality wood preservative.

Repairs to sash windows that are old and casement window frames should be handled with care and minimal disruption. It is possible to repair the majority of traditional wooden window repair Near Me designs without removing the frame. This should be done as often as is feasible. Loose or peeling paint must be removed with care and sanded lightly to increase the 'key' of the surface, allowing for an improved adhesion of the new coating. It is important to not remove old paint layers, as they could have historical significance.

If a portion of wood is rotting the best option is to take it off and replace it with timber inserts shaped to match the existing profiles. The inserted wood should also be treated with a wood preserver and the connection between the timber cill and the sub-cill for masonry should be sealed.

Replacement of traditional windows using PVC-u can be an appealing option, particularly when the installer provides a 'one stop shop' installation service that can handle removal and replacement in one day. It is 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 appropriate recommendations for energy efficiency improvements as well as other technological improvements that don't affect the appearance of an historic building. Those who provide replacement windows should be registered with a Competent Persons Scheme like as FENSA. This will ensure that the replacements are deemed as a suitable option under Building Regulations. It is, of course, possible for a skilled and experienced carpenter to install PVC-u windows that match the the building originally. This is particularly true where windows are situated in listed buildings and conservation areas.