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Maintaining Timber Windows

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

Whenever possible repairs to existing windows should be carried out in-situ. Repairing the most severe areas of decay can be accomplished with the help of specialized resin-based systems.

Durability

Timber windows were designed to last for centuries. They do require some maintenance to keep them looking good. Maintenance tasks include repairs to sash cables and retightening pulleys on sash, and painting. There is also a rising demand to upgrade timber windows to improve energy efficiency. This could mean replacing old glazing units, fixing existing window rebates or putting up new cills to allow for improved air sealing.

A key problem with traditional windows is damage caused by corrosion of the paintwork. This is particularly important when it comes to sash windows as the gaps between sashes can often be extremely large. In these circumstances water may get through the paint film and cause rotting of the putty as well as the wood beneath. The rotting may be further aggravated due to weather conditions that are poor. To prevent this from happening, windows need to be painted regularly with an exterior wood paint.

In addition to repainting, corroded areas must be repaired using a resin-based repair product. This will ensure that the maximum possible amount of the original fabric is preserved. It is also necessary to minimise the number of holes you drill into the frame for cable entry, as they could let in water and cause decay.

The structural movement of the wall can cause distortions in the frame and sash. This can lead to the sash not fitting properly or sticking or jamming into the opening and cracked glazing. This is often corrected by putting in new sash frames constructed of slow-growing deal (pine) or oak. The cill should be made from durable hardwood such as oak to avoid differential movement between the new and existing work.

There are now several companies that produce Boston pattern wooden sash that fit into the majority of existing openings. These sash come in a variety of sizes and finishes that suit the needs of modern homeowners. These new sash, when combined with quadruple draft strip and improved thermal insulation can make a huge difference to the efficiency of a home's energy use.

Aesthetics

A lot of old timber frames have a high aesthetic appeal, since they display, in a certain form, the quality of the wood technology, the construction process, and the architectural aesthetics of the time they were built. They could also have a significant historic value in their own right. This is especially true of early unglazed window openings in timber-framed structures, where the great majority were just a collection of openings within the frame that were subdivided horizontally into mullions, and vertically into wood or iron bars to keep out intruders.

Traditional window joinery made of timber is a beautiful aspect of a building, and is crucial to keep its appearance. It is essential that any decay that results from water penetration is stopped as soon as it is identified. This is best accomplished by painting thoroughly, especially in areas where there has already been damage or deterioration. It is recommended to choose paints that are intended to be used in a set (primer undercoat and finish), and to adhere to the manufacturer's recommendations for preparation and number of coats at each stage.

The fungus that causes wet rot is able to spread quickly in old windows made of wood. To stop this from happening, get rid of any damaged or rotten components as quickly as you can. The replacement of wood that is rotting must be done with care by using a slow-growing deal (pine) and, wherever feasible using the same species as which is being removed to prevent differential movement between the new section and the existing timbers.

In the late medieval and 17th century periods glass became less expensive and more plentiful so that glazed openings in timber-framed buildings gradually became more sophisticated with wooden tracery as well as moulded mullions and protruding cills. The glazing was increasingly laid within rebated frames and then pinned with 'glazing sprigs', rather than into lead cames. This method of glazing is not only less susceptible to leaks, but it can allow for larger clearer, more transparent 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 due to their thickness, multilayer construction and focus on particulars. They also feature large glass areas as well as deep projection cills which reduce air infiltration. With secondary double glazing repairs near me and draught proofing, the windows can be improved to improve their energy efficiency. It is essential to remember that these measures should be taken into consideration when it comes to the overall integrity and look of the original windows.

Therefore, keeping existing historic windows that are in need of repair instead of replacing them is logical particularly when thermal enhancements can be made cost-effectively through simple repairs and upgrades. Older windows typically have a historical value that shows a variety of technological advancement and changes in architectural style. The pressure to replace these windows are usually based on the assumption that the windows of the past will require replacement in the near future, however the majority of them are in a position to last for 150, 200 or even 250 years, if properly maintained.

It is crucial to understand that decay issues with traditional timber windows are preventable by timely and thorough repairs. It is also crucial to spot damp issues and fix them quickly so that you can avoid serious damage. The early deterioration of paint is a major issue, since it allows moisture penetrate the wood and cause wet rot. It is not uncommon for this issue to go undetected until the paintwork begins to crack or become wavy. However, it can cause structural damage and further decay.

A high-quality paint will prevent this moisture from entering. To prevent mould and condensation it is essential to keep the paintwork as clean as you can. Modern synthetic paints pose a problem because they are water-resistant and can cause mildew growth in the window frame.

The majority of windows from the past were constructed from timber with the majority of sapwood. The timbers will deteriorate quickly when exposed to moist weather, but can be protected with an extensive preservative treatment prior to when they are put to use. It is crucial to select the right type of wood for your location and climate, as these variables can affect the durability of the joinery. Local window manufacturers provide an array of timber sash which can be made to fit the historic openings. They can be made in the standard Boston pattern or in custom sizes to suit historic buildings.

Maintenance

Regular inspections carefully redecorated, as well as quick upvc door handle repairs Near me can prolong the life of timber windows. The primary cause of wood decay is moisture penetration through deteriorated paint or putty. This can be prevented by using a good wood preservative and thoroughly painting the wood.

Repairs to sash windows that are old and window frames made of casement must be done with care and with minimal disruption. A lot of traditional wooden window designs can be repaired without removing the frame, and this method should be used whenever it is feasible. Remove any peeling or loose paint and lightly sand the surface to improve the 'key" of the surface. This will allow the new coating to adhere better. It is important to avoid stripping old paint layers which could have historical value and if they are present, it is recommended that a paint analysis be conducted.

When a section of wood is rotting the best way to deal with it is to take it off and replace it with timber inserts designed to match the existing profiles. The wood that is inserted should be treated with a wood preservative and the connection between the cill for timber and the masonry sub-cill should be sealed.

Replacement of windows made of traditional PVC-u is a tempting option, especially when the installer offers a "one-stop shop" installation that handles removal and replacement in a day. However, it is crucial that the person who installs windows replacement has a thorough knowledge of the construction and history of traditional wooden frames. This will enable them to make appropriate suggestions for improvements to energy efficiency and other technological upgrades that won't harm the historical character of a building. Anyone who installs replacement windows should be registered under a Competent Persons Scheme like as FENSA. This will ensure the replacements are deemed to be approved under Building Regulations as a suitable option. A skilled carpenter can install PVC-u Windows that are sympathetic to original building's character. This is particularly true where windows are situated in listed buildings or conservation areas.