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Maintaining Timber Windows

A well-maintained wooden window is an essential element of a building that is historic. It reflects in varying degrees, the technology and materials of the time it was constructed, the design and craftsmanship.

If repairs are possible to existing windows should be carried out in situ. Proprietary resin-based repair systems can be used to fix the most damaged areas of decay without having to remove the entire window lock repairs.

Durability

Timber windows were designed to last hundreds of years. They require regular maintenance to keep them looking good. Maintenance tasks include repairs to sash cords and retightening pulleys on sash, and painting. There is also a rising demand to upgrade timber windows to increase the efficiency of energy. This may mean replacing old glazing units, fixing existing window rebates or putting up new cills the air to seal better.

The deterioration of paintwork is a major problem with traditional windows. This is particularly important when windows with sash are involved since the gaps between the sashes can be quite large. In these instances, water can penetrate the paint film and cause rotting of the putty as well as underlying wood. Poor weather conditions can exacerbate the decay. To stop this from happening, windows must be painted regularly with an exterior wood paint.

In addition to repainting, corroded areas must be repaired using an adhesive-based repair product. This will ensure that the maximum amount of the original fabric is preserved. It is essential to limit the number of holes that are created in the frame to allow cable access, since they can let in moisture and cause decay.

Another issue with older windows is the structural movement within the wall which could cause deformation of the frame and sash. This could result in sash no longer fitting correctly or sticking or jamming into the opening and cracked glazing. This can be corrected often by fitting new sash frames constructed of slow-grown deal (pine), or oak. The cill should be constructed of a durable hardwood like oak to prevent movement between the old and new work.

There are several companies that manufacture Boston pattern wooden sash to fit most existing openings. The sash is available in a variety of sizes and finishes that suit the needs of modern homeowners. The new sash, coupled with quadruple draft strips and improved thermal insulation can make a huge difference to the efficiency of your home's energy usage.

Aesthetics

Many old wooden windows have an excellent aesthetic value as they often demonstrate, in a way, the materials and technology and architectural style of the period from which they originate. They may have significant historical significance as a set. This is especially true for early unglazed window installation cambridge openings in timber-framed structures, which were just a collection of openings within the frame that were subdivided horizontally into mullions and wood or iron bars to keep out invaders.

It is important to maintain the appearance of traditional timber window joinery. As soon as you notice any decay caused by the penetration of moisture it is crucial to stop it. It is recommended to do this through thorough painting, especially if there is damage or deterioration. It is best to choose paints that are intended to be used in a set (primer undercoat and finish), and to follow the manufacturer’s recommendations for preparation and number coats at each stage.

Wet rot is a common problem in older timber windows. The best method to stop it from developing is to remove sections that are damaged or rotten as soon as you can to prevent the spread of the fungus that causes it. The replacement of wood that is rotting should be done with care and with a slow-growing deal (pine) and, whenever possible using the same species as that which is being removed to avoid shifting between the new and old timbers.

In the late period of the 17th century and the middle of the medieval period, glass became more affordable and abundant, so that the glazed openings in timber-framed structures gradually became more sophisticated with wooden tracery as well as moulded mullions and projecting cills. In recent years, glazing was pinned into frames that were rebated using cambridge double glazing sprigs, not lead cames. This method of glazing is not only less susceptible to leaks, but also allows for larger, clearer sheets of glass to be used in the windows than would otherwise be possible without the need for lead lights.

Energy efficiency

Traditional timber windows are energy efficient due to their thickness, multilayer construction and care for the smallest of details. They also have large glass areas and deep projecting cills that reduce air infiltration. With secondary glazing and draughtproofing, the windows can be improved to increase their energy efficiency. It is essential to remember that these measures need to be considered when it comes to the overall appearance and integrity of the original windows.

As a result, retaining existing historic windows that are in need of upvc repairs door repair (visit the next site) rather than replacing them is logical particularly when thermal improvements can be achieved economically through simple repairs and improvements. Historic windows are often of historical value, as they reflect a variety of technical development and changes to architectural taste. The pressures to replace such windows are generally based on the assumption that the windows of the past will require replacement in the near future, however most are still capable of providing service for 150, 200 and even 250 years, if properly maintained.

It is important to recognize that decay issues associated with traditional timber windows are avoidable with timely and thorough repairs. In addition, it is essential to recognize damp penetration issues and to remedy them quickly to avoid serious damage. Early deterioration of paint is a major problem since it allows moisture penetrate the wood and cause wet rot. This damage is often not evident until the paintwork is cracking or wavy but it can cause severe structural damage, and could lead to further decay.

A high-quality paint will stop this moisture from entering. It is also important to keep the paintwork spotless to avoid condensation and the growth of mould. Modern synthetic paints pose a challenge since they are usually water-resistant and may cause mildew growth in the window frame.

Most older windows were made of sapwood-rich timber. These timbers deteriorate quickly if exposed to rain, but they can be protected with a thorough preservation process prior to use. It is also important to ensure that the type of wood used is suitable to the climate and site conditions, as these factors affect the durability of the joinery. Local window manufacturers produce a range of sash made of timber that can be tailored to fit specific openings from the past. They can be produced in the standard Boston pattern or in custom sizes to fit the architectural style of historic structures.

Maintenance

Regular inspections carefully redecorated, as well as prompt repairs can extend the lifespan of windows made of timber. The most common reason for the decay is moisture intrusion through deteriorated putty and paint. This can be prevented by using a good wood preservative and painting the wood thoroughly.

It is crucial that repairs to old sash and casement windows are well executed, and carried out with the minimum disturbance. Repairs can be made to several traditional designs of timber windows without taking the frame off. This should be done as often as is feasible. Remove loose or peeling paint and lightly sand the area to improve the "key" of the surface. This will allow the new coating to stick better. Care should be taken to avoid stripping old paint layers which may have historic value If these are present it is recommended that a paint analysis be conducted.

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

Replacement of traditional windows using PVC-u is an appealing option, particularly when the installer provides an "all-in-one" installation that handles removal and replacement within a day. It is, however, vital that the installer of windows replacement has a thorough understanding of the construction and history of traditional wooden frames. This will allow them to make appropriate recommendations for energy efficiency improvements and other technical improvements that won't harm the historical character of a building. Those who provide replacement windows should be registered with a Competent Persons Scheme, such 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 are sympathetic to the character of the building originally. This is especially relevant when windows are in listed buildings or conservation areas.