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The Little-Known Benefits Of Cambridge Window
Maintaining Timber Windows

A well-maintained window made of timber is a significant element of the historic fabric of a structure. It reflects in varying degree the technology and materials of the time it was constructed, the craftsmanship and architectural taste.

If repairs are possible to existing windows should be done in-situ. The repair system that is based on resin can be used to fix the most damaged areas of decay without having to remove the entire window.

Durability

The windows made of timber in many historic buildings were built to last for centuries. But, they have to be maintained to ensure they look good and functioning properly. The most frequently-asked maintenance tasks include sash-cord repairs, re-tightening sash pulleys, and painting. The demand for upgrading timber windows in order to increase efficiency in energy use is also growing. This could include replacing old glazing units, fixing the window rebates that are in place or installing new cills to increase the air seal.

A key problem with traditional windows is damage caused by corrosion of the paintwork. This is especially true when sash windows are concerned, as the gaps between sashes may be very large. In these circumstances water may get through the paint film and cause rotting of the putty as well as underlying wood. The weather can be a factor in accelerating the rotting. To stop this from happening, windows should be painted regularly with an exterior wood paint that is suitable.

In addition to repainting, areas that have corroded should be repaired with a resin-based repair product. This will ensure that the greatest amount of original fabric retained. It is important to minimize the number of holes that are created in the frame to allow cable access, since they can let in moisture and cause decay.

The structural movement of the wall could also cause distortions in the frame and sash. This could result in the sash not fitting properly, sticking or jamming in the opening, and damaged glazing. This is often corrected by putting in new sash frames constructed of slow-grown deal (pine), or oak. The cill must be constructed of a durable hardwood like oak to avoid any movement between the new and existing work.

There are several companies that manufacture Boston pattern wooden sash that fit in with the majority of openings. They are available in various sizes and finishes that fit the needs of modern homeowners. Repair My Windows And Doors , when combined with quadruple draft strips and improved thermal insulation can make a significant difference to the energy-efficiency of a home.

Aesthetics

Many old timber windows have a high aesthetic value since they usually demonstrate, in a way the materials and technologies and architectural style of the period from which they originate. They also may have a significant historic value in their in their own right. This is especially true for windows that were unglazed in the early days of timber framed buildings where the great majority were simply a series of openings within the structural frame sub-divided horizontally into mullions and wood or iron bars to keep out intrusions.

Traditional window joinery made of timber is a beautiful aspect of a building, and is essential to keep it looking good. As soon as you notice any signs of decay caused by the penetration of moisture it is crucial to stop it. This is best accomplished by a thorough painting process, especially in areas where there has already been damage or deterioration. It is recommended to use paints that are specifically designed to be used as part of a system (primer undercoat, finish) and follow the manufacturer's instructions in relation to preparation and the number of coats needed at each stage.

Wet rot is a typical issue in old timber windows. The best method to stop it from growing is to eliminate sections that are damaged or rotten as soon as possible to prevent the spread of the fungus responsible for it. Replace rotting wood with slow-growing deal (pine) and, if possible, the same kind of timber as the one being removed, to avoid the possibility of differential movement.

In the late medieval and 17th century periods glass became more affordable and plentiful so that glazed openings in timber-framed buildings gradually became more sophisticated with wooden tracery moulded mullions, moulded mullions, and deep protruding cills. In recent times, glass was fixed to frames that were rebated using glazing sprigs rather than lead cames. This method of glazing not only makes windows less likely to leak, but also allows for wider sheets of clearer glass to be used than would have been possible otherwise without the use of leaded 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 projecting cills, and the large glazing areas help to reduce air infiltration. With secondary glazing and draught proofing, windows can be made more efficient to improve their energy efficiency. It is crucial to keep in mind that these measures should be taken into consideration when it comes to the overall integrity and appearance of the original windows.

As a result, retaining old windows that are in need of repair instead of replacing them is logical especially when their thermal enhancements can be achieved inexpensively with simple repairs and upgrades. Historic windows are often of historical value, as they reflect a variety of technological advancements and changes to the architectural style. The pressures to replace these windows are usually based on the assumption that the old windows will need replacement in the near future, but they are in a position to last for 150, 200 and even 250 years, if properly maintained.

It is essential to realize that decay problems with traditional timber windows are preventable by prompt and thorough repairs. It is also essential to recognize damp issues and fix them quickly in order to avoid major damage. The early deterioration of paint is a major problem since it allows moisture penetrate the wood and cause wet rot. This type of damage is typically not evident until the paintwork is cracking or wavy but it can cause severe structural damage and lead to further decay.

A good quality paint will stop this moisture penetration. It is also important to keep the paintwork clean in order to prevent condensation and the growth of mould. Modern synthetic paints are problematic since they are usually water-resistant, and can cause mildew to develop within the window frame.

The majority of windows from the past were constructed of sapwood-rich timber. The timbers will deteriorate rapidly if exposed to wet weather, but can be protected by a thorough preservative treatment before they are put to use. It is also essential to ensure that the kind of timber used is well-suited to the climate and site conditions, as these elements affect the durability of the joinery. Local window manufacturers offer various types of sash timbers that can be customized to fit historic openings. They can be produced in the standard Boston pattern or in custom sizes to fit the architectural style of historic buildings.

Maintenance

Regular inspections carefully redecorated, as well as quick repairs can prolong the life of timber windows. The primary cause of decay is the infiltration of moisture through deteriorated paint and putty. This can be avoided by thorough painting and the use of a good quality wood preservative.


It is essential that repairs to old sash or casement windows are properly executed and done with minimal disruption. A lot of traditional wooden window designs are repairable without removing the frame, and this approach should be used whenever it is feasible. Peeling or loose paint should be removed with care and lightly sanded to improve the 'key' of the surface and facilitate an improved adhesion of the new coating. It is important to avoid stripping old paint layers that could have historical value and if they are present, it is recommended that a paint analysis be conducted.

Where a section of timber has begun to decay, the best option is to eliminate the rotten material and replace it with spliced-in timber inserts that are shaped to match the existing profiles. The timber inserts should be treated with wood preservative and the junction between masonry sub-cills and timber cill should be sealed.

Replacement of windows made of traditional PVC-u can be an attractive option, especially when the installer offers a "one-stop shop" installation that handles both removal and replacement within a day. However, it is vital that the installer of windows replacement has a thorough knowledge of the structure and history of traditional wooden frames. This will allow them to make the right recommendations for energy efficiency improvements as well as other technological improvements that don't harm the character of a historic building. The windows that are replaced must be registered under a Competent Persons Scheme such as FENSA. This will ensure that replacement windows are deemed acceptable under 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 true when the windows are in listed buildings or conservation areas.