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Maintaining Timber Windows

A well-maintained wooden window is an important component of a historical building. It reflects, in various degree the technology and materials of the time it was made, the design and craftsmanship.

If possible, repairs should be made on-site. Repairing the most deteriorated areas of decay is possible by using specialized resin-based systems.

Durability

The timber windows in many historic buildings were built to last for hundreds of years. They do require some maintenance to ensure they look good. Maintenance tasks include repairs to sash cables and retightening sash pulleys and painting. The need to upgrade timber windows in order to increase efficiency and energy efficiency is also increasing. This may include replacing old glazing units, repairing existing window rebates, or installing new cills for improved air door seal repair near me.

The corrosion of paintwork is a major issue with traditional windows. This is particularly important when sash windows are involved as the gaps between sashes can be extremely large. In these instances, water can penetrate the paint film and cause decay of the putty and the wood underneath. The rotting process can be made worse due to weather conditions that are poor. To prevent this from happening, windows need to be regularly painted with an exterior wood paint.

The areas that are damaged should also be repaired using resin-based products. This will ensure that the maximum amount of original fabric retained. It is also essential to reduce the number of holes that are drilled into the frame for cable entry since these could allow water in and cause decay.

The wall's structural movement can cause distortions in the frame as well as sash. This can result in the sash fitting incorrectly jamming, sticking or sagging in the opening, or breaking glass. This is often corrected by putting in new sash frames constructed of slow-growing deal (pine) or oak. The cill must be made from a sturdy hardwood, like oak, to prevent shifting between the new and older work.

To alleviate this issue, there are now a variety of companies that produce Boston pattern wooden sash that will fit into the majority of existing openings. The sash is available in a variety of sizes and finishes to suit the requirements of the modern homeowner. Together with quadruple draught strips and better thermal insulation these new sash can make an enormous difference to the energy efficiency of a home.

Aesthetics

A lot of old timber frames possess a dazzling aesthetic appeal, since they reflect, in some shape, the materials technology, the construction process, and the architectural style of the time they were built. They also may have significant historical value in their own right. This is especially true for early unglazed window openings in timber-framed structures, which were just a collection of openings within the structural frame sub-divided horizontally into mullions and vertical wood or iron bars to keep out intrusions.

Traditional window joinery made from timber can be a highly decorative element of a structure and it is important to keep it looking good. As soon as you notice any signs of decay due to the penetration of moisture it is essential to stop it. This can be done by a thorough painting process, especially in areas in which there is already damage or degradation. It is best to choose paints that are intended 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.

The fungus that causes wet rot can quickly spread in old timber windows. To prevent this, get rid of any damaged or rotten components as promptly as you are able to. Replace rotting wood with slow-growing deal (pine) and, should it be possible, the same type of wood as the one that is being removed, to avoid the possibility of differential movement.

In the late the 17th and early the medieval periods, glass became more affordable and abundant, and the openings for glazed glass in timber-framed buildings gradually became sophisticated, with tracery made of wood moulded mullions, moulded mullions, and deep projecting cills. Increasingly, the glazing was set within rebated frames and secured with 'glazing sprigs' rather than being inserted into lead cames. This method of glazing is not just less prone to leaks but it can allow for much wider and clearer sheets of glass to be used in windows than would have been possible without the need for leaded lights.

Energy efficiency

Traditional timber windows have an excellent energy performance due to their thickness and multi-layer construction, as well as meticulous attention to detail. The large glass areas, the deep projecting cills, and the large glazing areas reduce air infiltration. The windows can be modified to improve their energy efficiency through draughtproofing and secondary glazing. It is essential to remember that these measures need to be considered in relation to the overall integrity and look of the original windows.

It makes sense to fix or upgrade windows that are older rather than replacing them, especially when the improvement in thermal efficiency can be achieved through simple upvc door repairs. The windows that are historic have a lot considered to be of historical value because they show a range in technological advancements and changes to architectural taste. Most people think that the windows will need to be replaced in the near future. However, most are still in service for 150, 200 or even 250 years with proper maintenance.

It is crucial to understand that decay problems in traditional timber windows are avoidable with prompt and thorough repairs. Additionally it is vital to spot damp penetration issues and fix them promptly to avoid major damage. Paint deterioration that occurs early can be a problem because it allows moisture to get into the wood, causing wet rot. The damage is usually not apparent until the paintwork becomes damaged or wavy but it can cause severe structural damage, and could lead to further decay.

A good quality paint will prevent this moisture from entering. To prevent mould and condensation, it is important to keep the paintwork as clean as possible. Modern synthetic paints pose a challenge because they are often water-resistant and may cause mildew to grow within the window frame.

The majority of older windows were constructed from timber with an extensive proportion of sapwood. These timbers deteriorate quickly if exposed to rain, however they can be protected with an extensive preservation treatment prior to use. It is also important to ensure that the kind of wood used is suited to the climate and site conditions, as these elements affect the durability of the joinery. Local window manufacturers make a variety of timber sash that can be tailored to fit specific historic openings. They can be built to the standard Boston pattern dimensions or to specific dimensions that are compatible with the historic architecture.

Maintenance

The life span of windows made from timber can be extended significantly by regular inspection as well as a careful redecoration and prompt repair. The most common reason for decay is moisture intrusion through deteriorated putty and paint. This can be prevented by careful painting and the use of an excellent wood preservative.

upvc door repairs to old sash windows and Window Doctor Near Me frames made of casement must be done with care and with minimal disruption. It is possible to upvc door repair several traditional designs of timber windows without taking the frame off. This should be done whenever possible. Loose or peeling paint must be removed with care and sanded lightly to increase the 'key' of the surface, allowing for a better adhesion of the new coating. It is important to avoid stripping old paint layers that might have historical significance, and where these are present, it is recommended that a paint analysis be conducted.

Where a section of timber has become rotten the best course of action is to eliminate the rotten material and replace it with spliced-in inserts that are shaped to fit the existing profiles. The inserted timber should also be treated with a wood preservative. The junction between masonry sub-cill and timber cill should be sealed.

It is tempting to replace traditional windows with PVC U, particularly if the installer offers an 'all-in-one' installation which includes both removal and replacement in a single day. It is important that the installers of replacement windows have a thorough understanding of the history and design of traditional timber frames. This will enable them to make the right recommendations for energy efficiency improvements 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 such as FENSA. This will ensure that replacement windows are approved in accordance with Building Regulations as a suitable alternative. It is certainly possible for a skilled and experienced carpenter to install PVC-U windows that match the style of the building originally. This is particularly true when the windows are located within conservation areas or listed buildings.