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Maintaining Timber Windows

A well-maintained wooden window is an essential part of a historic building. It demonstrates in various degrees the different materials and technologies design, craftsmanship and aesthetics of the time that it was built in.

Whenever possible repairs to existing windows should be carried out in-situ. Repair systems made of resin can be used to fix the most deteriorated areas without removing the entire window.

Durability

The timber windows in many historical buildings were made to last for centuries. They require regular maintenance to keep them looking great. The most common maintenance tasks include sash-cord repairs as well as tightening sash pulleys and painting. There is also a growing demand for upgrading timber windows to increase energy efficiency. This could mean replacing old glazing units, fixing existing window rebates or putting in new cills to allow for improved air sealing.

One of the main issues with traditional windows is the damage caused by corrosion of the paintwork. This is especially true in the case of sash windows as the gaps between sashes may be extremely large. In these instances water can get into paint film and cause rotting to the wood or putty beneath. The rotting can be exacerbated by poor weather conditions. To prevent this from happening, windows need to be painted regularly with an exterior wood paint.

In addition to repainting, areas that have corroded need to be repaired with a resin-based repair product. This will ensure that the maximum possible amount of the original fabric is retained. It is also important to reduce the number of holes drilled into the frame for cable entry since these could admit water and lead to decay.

The structural movement of the wall could also cause distortions in the frame as well as sash. This can result in sash no longer fitting correctly, sticking or jamming in the opening and broken glazing. Most often, this is corrected by fitting new sash boxes constructed from slow-growing deal (pine) or oak. The cill must be constructed of a durable hardwood like oak to prevent movement between the old and new work.

To alleviate this issue There are a number of companies who manufacture Boston pattern wooden sash that can be fitted into most openings. These sash come in a variety of sizes and finishes to suit the needs of modern-day homeowners. In conjunction with quadruple draught strip and improved thermal insulation, these new sash can make a substantial difference to the energy efficiency of a house.

Aesthetics

Many old timber windows have a high aesthetic value as they often show, in a particular way, the materials and technology and architectural taste of the time from which they date. They may also have significant historical significance in their own right. This is especially true for early windows that were not glazed 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 invaders.

It is essential to preserve the appearance of traditional Wooden windows cambridge window joinery. It is essential that any decay caused by the penetration of moisture should be stopped as soon as it is identified. This is best accomplished by a thorough painting process, especially in areas in which there is already damage or deterioration. It is advisable to use paints specifically designed to be used part of the system (primer undercoat, finish) and to follow the manufacturer's recommendations regarding preparation and the number of coats needed at each stage.

The fungus that causes wet rot can quickly spread in old timber windows. To stop this from happening, get rid of any damaged or rotten parts as soon as you can. Replace rotting wood with slow-grown deal (pine) and, when possible, the exact kind of timber as the one being removed, to prevent the possibility of differential movement.

In the late the 17th and early the medieval periods, glass became less expensive and more abundant, so that the glazed openings in timber-framed buildings gradually became elegant with wooden tracery, moulded mullions and deep protruding cills. In recent years, glazing was fixed into frames that were rebated using glazing sprigs instead of lead cames. This method of glazing is not just less susceptible to leaks, but it can allow for more expansive clearer, more transparent sheets of glass to be used in the windows than would be possible without the need for lead lights.

Energy efficiency

Traditional timber windows provide excellent energy efficiency due to their thickness and multi-layer construction. They also pay careful attention to detailing. The large glass surfaces, the deep projection cills and wide glazing areas minimize air infiltration. Windows can be designed to improve their energy efficiency by draught-proofing and secondary glazing. It is essential to keep in mind that these measures need to be considered when it comes to the overall appearance and integrity of the original windows.

So, retaining the existing windows from the past that require repair rather than replacing them is logical, particularly when their thermal enhancements can be made cost-effectively through simple upvc repairs and upgrades. The windows that are historic have a lot of historical value, as they demonstrate a variety in technological advancement and changes in the architectural style. Most people assume that these windows will need to be replaced in the near future. However, they can still provide service for 150, 200 or even 250 years if they are maintained with proper maintenance.

It is crucial to recognize that the decay issues that are caused by traditional windows made of timber can be avoided through regular maintenance and prompt emergency upvc door repairs. Additionally it is vital to spot damp penetration issues and address them swiftly to prevent serious damage. Early paint deterioration is a concern because it allows moisture to penetrate into the wood, leading to wet rot. It is not uncommon for this damage to go unnoticed until paintwork begins to crack or become wavier. However, it can cause structural damage and further decay.

A good quality paint will stop this moisture penetration. It is also essential to keep the paintwork spotless in order to prevent condensation and the growth of mould. The use of modern synthetic paints can pose a problem because they are usually designed to be water-resistant and this can cause the growth of mildew within the window frame.

Most older windows were made of sapwood-rich timber. These timbers can deteriorate quickly when exposed to rain, however they can be preserved with an extensive preservation treatment prior to use. It is also important to ensure that the kind of timber used is well-suited to the site and climate conditions, as these elements can affect the longevity of the joinery. Local window manufacturers create a variety of timber sash that can be adapted to fit specific openings in historic buildings. They can be constructed 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 considerably by regular inspection as well as a careful redecoration and timely repair. The primary cause of wood decay is moisture penetration through deteriorated paint and putty. This can be avoided by using a quality wood preservative and painting the wood thoroughly.

It is important that repairs to old sash or casement windows are well executed, and carried out without causing any disturbance. Repairs can be made to the majority of traditional wooden window seal repairs designs without taking the frame off. 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 and allow for an improved adhesion of the new coating. Be careful to avoid stripping paint layers that might have historical significance and if they are present it is recommended that a paint analysis be carried out.

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

It's tempting to replace traditional windows with PVC u, particularly if the installer offers an all-in-one installation that includes removal and replacement in a single day. It is, however, essential that the person installing windows replacement has a thorough knowledge of the construction and history of traditional wooden frames. This will enable them to make appropriate suggestions for energy efficiency improvements and other technological improvements that don't affect the appearance of an historic building. Those providing replacement windows should be registered with a Competent Persons Scheme such as FENSA. This will ensure that replacement windows are deemed to be approved in accordance with Building Regulations as a suitable option. A skilled carpenter can put in PVC-u windows that conform to original building's character. This is particularly relevant when windows are situated within conservation areas or listed buildings.