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Maintaining Timber Windows

A well-maintained wooden window is a crucial component of a historical building. It reflects in varying degree the technology and materials of the time in which it was made, the craftsmanship and architectural taste.

If it is possible, repairs must be made on-site. Repairing the worst areas of decay can be done using proprietary resin-based systems.

Durability

Timber windows were designed to last hundreds of years. They require regular maintenance to ensure they look good. The most frequently-asked maintenance tasks include repairs to sash cords, re-tightening sash pulleys, and painting. There is also a rising demand to upgrade the timber windows to improve energy efficiency. This can involve replacing old glass units, repairing the window rebates that are in place or putting up new cills to allow for better air sealing.

The corrosion of paintwork is a major issue with traditional windows. This is especially important where cambridge windows and doors with sash are involved since the gaps between the sashes can be very large. In these cases water can enter the paint film and cause rotting of the wood or putty beneath. The weather can be a factor in accelerating the decay. To prevent this from happening, windows must be regularly painted with an exterior wood paint.

The areas that are damaged should be repaired using resin-based products. This will ensure that the best possible amount of the original fabric is preserved. It is essential to limit the number of holes that are created into the frame in order to allow cable entry, as these can admit moisture and cause decay.

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

There are several companies that produce Boston pattern wooden sash to fit most existing openings. These sash are available in a variety of sizes and finishes to suit the needs of the modern homeowner. These sash are coupled with quadruple draft strips and improved thermal insulation can make a significant difference to the efficiency of a home's energy use.

Aesthetics

Many old timber windows have a great aesthetic value as they often demonstrate, in a way the materials and technologies and architectural taste of the period from when they were built. They may have significant historical value in their own right. This is especially true for early unglazed commercial window repair openings in timber-framed structures, where the great majority were just a collection of openings in the frame that were subdivided horizontally into mullions, and vertically into wood or iron bars to deter invaders.

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

The fungus responsible for wet rot is able to spread quickly in old windows made of wood. To stop this from happening, remove any rotten or damaged parts as promptly as you are able to. Replace rotting wood with slow-growing deal (pine), and should it be possible, the same kind of timber as the one that is being removed to prevent differential movement.

In the late medieval and 17th century periods glass became cheaper and more plentiful so that glazed openings in timber-framed buildings gradually became more sophisticated, with tracery made of wood moulded mullions, moulded mullions, and deep protruding cills. In the past, more often, the glass was placed within frames with rebates and secured with 'glazing sprigs' rather than being inserted into lead cames. This method of double glazing repairs cambridge not only makes the windows less likely to leak, but also allows for more clear glass sheets to be used than would have been possible without the use of led lights.

Energy efficiency

Traditional timber windows have a good energy performance due to their thickness and multi-layer construction. They also pay careful attention to detailing. The large glass surfaces, the deep projecting cills and large glazing areas minimize air infiltration. Windows can be designed to improve their energy efficiency through draughtproofing and secondary glazing. However it is essential to keep in mind that any such measures should be evaluated in relation to the overall integrity and appearance of the original window.

It is logical to repair or upgrade existing windows that are older rather than replacing them, particularly when improvements in energy efficiency can be made through simple fixes. Historic windows are often considered to be of historical value because they demonstrate a variety in technical development and changes to architectural taste. Many people believe that these windows will have to be replaced in the near future. However, they can still provide service for 150, 200 or even 250 years if you take care of maintenance.

It is crucial to recognize that the decay issues that are caused by traditional timber windows can be avoided through regular maintenance and swift repairs. Additionally it is crucial to spot damp penetration issues and to remedy them quickly to prevent serious damage. The early deterioration of paint is a major issue, because it allows moisture to penetrate the wood and cause wet rot. This damage is often not noticed until the paintwork becomes damaged or wavy but it can cause severe structural damage and can lead to further decay.

A quality paint will stop moisture from entering the paint. To prevent mould and condensation it is crucial to keep the paintwork as clean as it can be. Modern synthetic paints could be a problem since they are typically made to be water-resistant which can cause the growth of mildew inside the window repairs cambridge frame.

Most older windows were made from sapwood-rich wood. The timbers will deteriorate quickly when exposed to moist weather, however they can be protected by a thorough treatment of preservative before they are put to use. It is also essential to ensure that the kind of wood used is suitable to the location and climate conditions, since these factors will influence the durability of the joinery. Local window repair specialists manufacturers offer an array of timber sash which can be customized to fit historic openings. They can be constructed to the standard Boston pattern dimensions or to custom sizes that are in keeping with the architectural style of historic buildings.

Maintenance

The lifespan of windows made of timber can be extended through regular inspections as well as a careful redecoration and timely repair. The major cause of decay is moisture penetration through deteriorated paint and putty. This can be prevented by using a good wood preservative and painting the wood thoroughly.

Repairs to old sash windows and frameless casement windows should be handled with care and with minimal disruption. Many traditional timber window designs are repairable without removing the frame, and this approach should be followed whenever possible. Remove loose or peeling paint and then lightly sand the surface to improve the "key" of the surface. This will enable the new coating to stick better. It is important to avoid removing old paint layers, which could have historical significance.

If a piece of timber has begun to decay, the best option is to take out the rotten material and replace it with spliced-in timber inserts that are shaped to match existing profiles. The inserted wood should also be treated with wood preservative and the connection between the cill for timber and the masonry sub-cill should be sealed.

It is tempting to replace traditional windows with PVC u, especially when the installer provides an 'all-in-one' installation which includes both removal and replacement in one day. It is vital that the installer of windows replacement has a thorough understanding of the construction and history of traditional wooden frames. This will enable them to make appropriate recommendations for energy efficiency improvements and other technical improvements that do not alter the historic character of a building. Window replacements should be registered with a Competent Persons Scheme such as FENSA. This will ensure that the replacement windows are approved as a suitable solution under Building Regulations. It is, of course, possible for an experienced and skilled carpenter to install PVC-u windows that match the style of the building originally. This is especially relevant when windows are located within listed buildings or conservation areas.