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Maintaining Timber Windows

A well-maintained timber window is an important part of the historic fabric of a structure. It demonstrates in various degrees the materials and technologies, craftsmanship and architectural taste of the period from which it dates.

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

Durability

Timber windows were made to last hundreds of years. They do require some maintenance to ensure they look good. Maintenance tasks include repairs to sash cords as well as tightening the sash pulleys and painting. There is a growing need to upgrade timber windows to increase the efficiency of energy. This could mean replacing old glazing units, repairing the window rebates that are in place or putting in new cills to allow the air to seal better.

A key problem with traditional windows is the damage caused by corrosion of the paintwork. This is particularly true when commercial windows cambridge made of sash are involved because the gaps between the sashes can be quite wide. In these circumstances water can get into the paint film and cause decay of the putty and underlying wood. Poor weather conditions can exacerbate the rotting. To stop this from happening, windows should be regularly painted with an exterior wood paint.

The areas that are damaged should be repaired using a resin-based product. This will ensure that the maximum possible amount of the original fabric is preserved. It is important to minimize the number of holes that are drilled in the frame to allow cable entry, because they could let in moisture and cause decay.

The wall's structural movement can also lead to deformations in the frame and the sash. This can result in the sash not fitting properly, jamming or sticking in the opening, and even broken glass. Most often, this is corrected by fitting new sash boxes constructed from slow-growing deal (pine) or oak. The cill must be made of a durable hardwood, such as oak, to avoid differential movement between new and old work.

To alleviate this issue to reduce the risk of this happening, there are a variety of companies that produce Boston pattern wooden sash that will fit most existing openings. These sash come in various sizes and finishes that fit the needs of modern homeowners. The new sash, combined with quadruple draft strips cambridge door and window a better thermal insulation, can make a significant difference to the efficiency of your home's energy usage.

Aesthetics

Many old timber frames have a high aesthetic appeal, since they reflect, in some form, the materials technology, the construction process, and the architectural aesthetics of the time they were constructed. They could also have a significant historic value in their individual cases. This is especially true of early unglazed windows in timber-framed buildings, in which the majority were series of openings in frames of structural construction, which were divided horizontally by mullions, and vertically by iron or wood bars to keep out intruders.

It is essential to preserve the appearance of traditional wooden window joinery. It is essential that any decay that results from moisture penetration should be removed as soon as it is discovered. It is recommended to do this through thorough painting, especially if there is damage or deterioration. It is advisable to use paints that are designed to be used as part of a system (primer undercoat, finish) and to follow the manufacturer's recommendations in relation to preparation and the number of coats needed at each stage.

Wet rot is a common issue in old timber windows. The best method to stop it from growing is to eliminate any damaged or rotten parts as soon as possible to stop the spread of the fungus responsible for it. The replacement of wood that is rotting should be carefully undertaken with a slow-growing deal (pine) and, whenever feasible, the same species as which is being removed to prevent any movement differences between the new section and the existing timbers.

Glass became cheaper and more abundant in the late medieval era and into the 17th century. This led to the openings for glazed windows on timber-framed houses became more complicated with moulded mullions and Weiter einkaufen traceries, made of wood and deep projecting cills. In recent times, glass was pinned into rebated frames with glazing sprigs instead of lead cames. This method of glazing is not only less prone to leaks but it can allow for more expansive and clearer sheets of glass to be used in windows than would be possible without the need for lead lights.

Energy efficiency

Traditional timber windows have a good energy performance due to their thickness, multi-layer construction and very meticulous attention to detail. They also feature large glass areas and projecting cills that reduce air infiltration. With secondary glazing and draughtproofing the windows can be improved to improve their energy efficiency. However it is essential to keep in mind that any such measures must be considered in the context of the overall integrity and appearance of the original window.

So, retaining the existing windows from the past that are in need of repair instead of replacing them is sensible especially when their thermal enhancements can be made cost-effectively through simple repairs and improvements. Older windows are usually of historical value, as they demonstrate a variety in technological advancement and changes in the architectural style. Many people believe that these windows will need to be replaced in the near future. However, many of them can still provide service for 150,200, and even 250 years if they are maintained with proper maintenance.

It is important to recognise that the decay problems associated with traditional timber windows can be prevented by thorough maintenance and timely repairs. Additionally, it is essential to identify damp penetration problems and fix them promptly to avoid serious damage. Early paint deterioration could be a problem as it allows moisture to penetrate into the wood, leading to wet rot. The damage is usually not noticed until the paintwork becomes wavy or cracked however, it can cause serious structural damage, and could lead to further decay.

A quality paint will block moisture penetration. It is also important to keep the paintwork clean in order to prevent mould and condensation. Modern synthetic paints can pose a problem, as they are often made to be water-resistant and this may lead to the formation of mildew in the window frame.

The majority of windows from the past were constructed from sapwood-rich wood. These timbers can deteriorate very rapidly if exposed to wet weather, but can be protected with a thorough preservative treatment before they are put to use. It is essential to select the right kind of wood for the site and climate, as these variables can affect the longevity of the joinery. Local window manufacturers make various types of timber sash that can be customized to fit specific historic openings. They can be made in the standard Boston pattern or in custom sizes to fit 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 decay is moisture intrusion through deteriorated paint and putty. This can be avoided by using a high-quality wood preservative and painting the wood thoroughly.

Repairs to old sash windows and window repair cambridge frames made of casement should be handled with care and minimal disruption. It is possible to repair many traditional timber window designs without having to remove the frame. This is a must whenever it is possible. 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 adhere better. Be careful to avoid stripping old paint layers that may have historic value If these are present, it is recommended that a paint analysis be carried out.

If a portion of wood has rotted the best way to deal with it is to take it off and replace it with timber inserts shaped to match the existing profiles. The timber that is inserted should be treated using wood preservative. The junction between the masonry sub-cill and the timber cill should be sealed.

Replacement of windows made of traditional PVC-u can be a tempting option, especially when the installer offers a "one-stop shop" installation that takes care of removal and replacement in one day. It is important that the installers of replacement windows have a deep understanding of the history and construction of traditional timber frames. This will enable them to make the right recommendations for energy-efficiency improvements and other technological upgrades that won't harm the character of a historic building. The windows that are replaced must be registered under a Competent Persons Scheme like as FENSA. This will ensure that the replacements are deemed as a suitable option under Building Regulations. It is certainly possible for an experienced and skilled carpenter to install PVC-u windows that match the character of the building originally. This is especially true where cambridge windows and doors are situated in listed buildings and conservation areas.