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Maintaining Timber Windows

A well-maintained window repairs cambridge made of timber is a significant part of the historic structure of a building. It is a representation of the materials and technologies design, craftsmanship and aesthetics of the time period that it was built in.

If upvc door repairs are possible to existing windows should be done in-situ. Repairing the most severe areas of decay can be accomplished by using specialized resin-based systems.

Durability

Timber windows were made to last for centuries. They do require maintenance to keep them looking great. Maintenance tasks include repairs to sash cables and retightening pulleys for sash and painting. The demand for enhancing timber windows to improve efficiency and energy efficiency is also increasing. This can include replacing old glazing units, fixing the window rebates that are in place or installing new cills to increase the air seal.

The deterioration of paintwork is a major issue with traditional windows. This is particularly important when windows made of sash are involved because the gaps between sashes can be quite large. In these situations water can get into paint film and cause rotting to the putty or wood beneath. The rotting may be further aggravated due to weather conditions that are poor. To stop this from happening, windows should be painted regularly with an exterior wood paint.

In addition to repainting, areas that have corroded must be repaired using a resin-based repair product. This will ensure the maximum amount of original fabric retained. It is also essential to limit the number of holes you drill into the frame to allow cable entry as these can let in water and cause decay.

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

There are a variety of companies that manufacture Boston pattern wooden sash to fit in with the majority of openings. The sash is available in various sizes and finishes that fit the needs of modern homeowners. These new sash, when combined with quadruple draft strip and improved thermal insulation can significantly improve the efficiency of a home's energy use.

Aesthetics

A lot of old timber frames have a great aesthetic appeal because they show, in some form, the quality of the wood technology, design, and style of the time they were made. 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 buildings where the great majority were merely a series of openings in the frame that were subdivided horizontally into mullions, and vertically into iron or wood bars to deter intruders.

It is essential to preserve the appearance of traditional wooden window joinery. When you spot any decay caused by moisture penetration it is crucial to stop it. It is recommended to do this by thorough painting, particularly if there is damage or deterioration. It is best to choose paints that are intended to be used in a system (primer undercoat and finish), and to follow the manufacturer’s recommendations for preparation and number coats at each stage.

The fungus that causes wet rot is able to spread quickly in old windows made of timber. 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 should it be possible, the same kind of timber as the one that is being removed to prevent any differential movement.

In the late period of the 17th century and the middle of the medieval period, glass became less expensive and more abundant, so that the glazed openings in timber-framed structures gradually became more sophisticated with wooden tracery as well as moulded mullions and projection cills. Increasingly, the glazing was laid within rebated frames and then pinned with 'glazing sprigs' rather than being inserted into lead cames. This method of glazing is not only less prone to leaking but it can allow for more expansive clearer, more transparent sheets of glass to be used in windows than would otherwise have been possible without the need for leaded lights.

Energy efficiency

Traditional timber windows offer 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 reduce air infiltration. The windows can be modified to increase their energy efficiency by draught-proofing and secondary glazing. However it is crucial to keep in mind that these measures should be viewed in terms of the overall integrity and appearance of the window in its original form.

It makes sense to repair or upgrade existing windows, rather than replacing them, particularly when improvement in thermal efficiency can be made through simple repairs. Older windows are usually of historical significance, since they show a range in technical development and changes to architectural taste. The pressure to replace these windows are typically based on the assumption that the windows that are old will need to be replaced in the near future, however most are still capable of serving for 150, 200 or even 250 years if properly maintained.

It is essential to realize that decay issues with traditional timber windows can be preventable by timely and thorough repairs. It is also essential to identify damp problems and correct them swiftly in order to avoid major damage. The early deterioration of paint is a particular problem, as it allows moisture to penetrate the wood and cause wet rot. It is not uncommon for this type of damage to go unnoticed until the paintwork begins to crack or become curly. However, it could cause structural damage and then further decay.

A high-quality paint will stop this moisture penetration. It is also essential to keep the paintwork in good condition to avoid condensation and the growth of mould. Modern synthetic paints can be problematic since they are typically made to be water-resistant and this can result in the formation of mildew inside the Window Mechnism Repair frame.

The majority of older windows were manufactured from timber containing an extensive proportion of sapwood. The timbers will deteriorate rapidly if exposed to wet weather, however they can be protected by a thorough preservative treatment before they are put 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 offer various types of sash made from timber that can be adapted to fit historical openings. They can be built to the standard Boston pattern dimensions or to custom dimensions that are compatible with historic buildings.

Maintenance

The life of timber windows can be extended considerably by regular inspection, careful redecoration and prompt repair. The main reason for the decay is moisture infiltration through deteriorated paint and putty. This can be prevented by using a high-quality wood preservative and painting the wood thoroughly.

It is essential that repairs to old sash and casement windows are properly executed, and carried out with minimal disruption. A lot of traditional wooden window designs can be repaired without dismantling the frame, and this method should be taken whenever possible. Remove peeling or loose 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 stripping old paint layers which could have historical value If these are present, it is recommended that a study of the paint be conducted.

If a portion of wood is decayed the best way to deal with it is to take it off and replace it with timber inserts shaped to match existing profiles. The timber inserts should be treated using wood preservative. The junction between masonry sub-cills and timber cill should be sealed.

Replacement of windows made of traditional PVC-u can be a tempting option, especially when the installer provides a 'one stop shop' installation that handles removal and replacement in one day. It is essential that installers of replacement windows have a deep understanding of the history and construction of traditional timber frames. This will enable them to make the appropriate recommendations for energy efficiency improvements as well as other technological improvements that don't affect the appearance of a historic building. Anyone who installs replacement windows must be registered under a Competent Persons Scheme such as FENSA. This will ensure that the replacements are approved as a suitable solution in accordance with Building Regulations. A skilled carpenter can install PVC-u windows that conform to the original character of the building. This is particularly relevant when windows are in listed buildings or conservation areas.