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Maintaining Timber Windows

A well-maintained wooden window is a crucial part of a historic building. It reflects in varying degree the technology and materials of the time period it was constructed, the craftsmanship and architectural taste.

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

Durability

Timber windows were built to last for centuries. They do require maintenance to ensure they look good. Maintenance tasks include upvc doors repairs to sash cords, retightening of sash pulleys and painting. The demand for upgrading timber windows in order to improve efficiency in energy use is also growing. This can include replacing old glazing units, repairing the window replacement cambridge 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 sash windows are involved as the gaps between sashes can be quite wide. In these circumstances water may get through the paint film and cause rotting of the putty as well as the wood 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 a resin-based product. This will ensure that the greatest amount of original fabric is retained. It is also important to limit the number of holes you drill into the frame for cable entry as these can admit water and lead to decay.

Another major issue with older windows is the structural movement within the wall that can cause deformation of the frame and sash. This could result in the sash fitting incorrectly jamming, sticking or sagging in the opening, and even broken glass. This can be fixed frequently by putting in new sash frames constructed of slow-grown deal (pine), or oak. The cill should be made from a sturdy hardwood such as oak to avoid any movement between the old and new work.

To reduce the risk, there are now several companies that manufacture Boston pattern wooden sash that will fit most existing openings. The sash is available in a range of sizes and finishes that meet the requirements of the modern homeowner. The new sash, combined with quadruple draft strips and a more efficient thermal insulation, could make a huge difference to the efficiency of your home's energy usage.

Aesthetics

A lot of old timber frames have a great aesthetic appeal, since they reflect, in some shape, the materials technology, design, and taste from the time period they were made. They may also have a significant historical significance in their individual cases. This is particularly true of early unglazed windows in timber-framed buildings, where the majority of them were series of openings in structural frames subdivided horizontally by mullions, and vertically by wood or iron bars in order to protect against invaders.

Traditional window joinery made from timber is a beautiful aspect of a building, and is essential to maintain its appearance. As soon as you notice any signs of decay caused by water penetration it is essential to stop it. It is recommended to do this by thorough painting, particularly if there is damage or deterioration. It is recommended to use paints designed to be used in a system (primer undercoat and finish), and to adhere to the manufacturer's recommendations for preparation and number coats at each stage.

The fungus responsible for wet rot can quickly spread in old windows made of wood. To stop this from happening, take out any rotten or damaged parts as quickly as you can. The replacement of rotting timber must be done with care with a slow-growing deal (pine) and, whenever feasible, the same species as that which is being removed to avoid any movement differences between the new section and existing timbers.

Glass became more affordable and abundant in the late medieval period and into the 17th century. This led to the glazed openings in timber-framed homes became more complex with moulded mullions, tracery made of wood and cills that protruded deep. Increasingly, the glazing was set within rebated frames and pinned in by 'Double Glazing Near Me sprigs' rather than being inserted into lead cames. This method of glazing is not just less prone to leaking but it also allows more expansive, clearer sheets of glass to be used in windows than would have been possible without the need for leaded lights.

Energy efficiency

Traditional timber windows are energy efficient because of their thickness and multilayer construction as well as care for detail. They also have large glass areas and projecting cills that reduce air infiltration. With secondary glazing and draughtproofing the windows can be improved to increase their energy efficiency. However, it is important to keep in mind that these measures must be considered in relation to the overall quality and appearance of the original window.

So, retaining old windows that are in need of repair rather than replacing them is sensible particularly when thermal enhancements can be achieved cost-effectively through simple repairs and upgrades. Historic windows are often considered to be of historical value because they reflect a variety of technical development and changes to architectural style. The pressure to replace these windows are generally based on the assumption that windows that are old will need to be replaced in the near future, however most are still capable of serving for 150, 200 and even 250 years, if properly maintained.

It is essential to understand that the decay issues associated with traditional timber windows can be avoided by regular maintenance and prompt repairs. It is also essential to spot damp issues and fix them quickly so that you can avoid serious damage. The early deterioration of paint is a major issue, because it allows moisture to penetrate the wood and cause wet rot. The damage is usually not noticed until the paintwork is damaged or wavy but it can cause severe structural damage, and could lead to further decay.

A good paint will stop moisture from entering the paint. It is also important to keep the paintwork in good condition to avoid condensation and the growth of mould. Modern synthetic paints can be problematic because they are usually formulated to be water-resistant, and this may lead to the formation of mildew in the window frame.

The majority of older windows were constructed from sapwood-rich wood. These timbers deteriorate quickly if exposed to rain, however they can be protected by a thorough preservation process prior to use. It is important to choose the right kind of wood for your location and the climate, since these factors can affect the longevity of the joinery. Local window repair manufacturers create a range of sash made of timber that can be tailored 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 historic buildings.

Maintenance

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

It is important that repairs to the old sash and casement windows are done correctly and done with minimal disruption. It is possible to repair many traditional timber window designs without removing the frame. This should be done as often as is feasible. Remove peeling or loose paint and lightly sand the area to improve the "key" of the surface. This will enable the new coating to adhere better. Care should be taken to avoid stripping old paint layers which could have historical value, and where these are present, it is recommended that a paint analysis be carried out.

If a piece of wood is rotting the best way to deal with it is to take it off and replace it with timber inserts that are shaped to match existing profiles. The timber that is inserted should be treated with wood preservative, and the joint between masonry sub-cills and timber cill should be sealed.

Replacement of windows made of traditional PVC-u may be a tempting option, especially when the installer offers an "all-in-one" installation that takes care of both removal and replacement within one day. However, it is vital that the installer of replacement windows has a full understanding of the construction and history of traditional wooden frames. This will enable them to make the right recommendations for energy-efficiency improvements and other technological upgrades that won't harm the character of a historic building. The windows that are replaced must be registered under a Competent Persons Scheme like as FENSA. This will ensure that replacement windows are approved under Building Regulations as a suitable alternative. It is certainly possible for an experienced and skilled carpenter to install PVC-U windows that fit the character of the original building. This is especially true where the windows are located in listed buildings or conservation areas.