Maintaining Timber Windows

A well-maintained wooden window is an essential part of a historic building. It reflects in varying degree the materials and technologies of the time in which it was constructed, the architectural style and craftsmanship.

If it is possible, repairs must be done in-situ. Proprietary resin-based repair systems can be used to fix the most deteriorated areas without removing the whole window.

Durability

Timber windows were made to last for hundreds of years. However, they need to be maintained to ensure that they look great and working properly. The most frequent maintenance tasks include sash-cord repairs and re-tightening the sash pulleys and painting. The demand for upgrading timber windows to improve efficiency and energy efficiency is also increasing. This can include replacing old glazing units, fixing existing window mechnism repair rebates, or installing new cills to improve air seal.

The corrosion of paintwork is a major problem with traditional windows. This is especially important in the case of sash windows, as the gaps between sashes can be quite large. In these cases, water can penetrate paint film and cause rotting to the putty or wood beneath. Weather conditions that are not ideal can accelerate the decay. To prevent this, windows should be painted regularly using a suitable exterior wood paint.

Areas that have been damaged must be repaired with resin-based products. This will ensure the maximum amount of original fabric is retained. It is also necessary to limit the number of holes you drill into the frame to allow cable entry as these can allow water in and cause decay.

Another issue with older windows is the structural movement within the wall that could cause deformation of the frame and sash. This could result in sash no longer fitting correctly, sticking or jamming in the opening, and damaged double glazing repairs near me. Most often, this is corrected through the installation of new sash boxes made from slow grown deal (pine) or oak. The cill should be constructed from durable hardwood such as oak to avoid differential movement between the old and new work.

There are several companies that produce Boston pattern wooden sash to fit most existing openings. The sash is available in a variety of sizes and finishes that will fit the needs of modern homeowners. The new sash, combined with quadruple draft strip and improved thermal insulation can make a significant difference to the efficiency of a home's energy use.

Aesthetics

Many old timber frames have a great aesthetic appeal, since they reflect, in some shape, the materials, technology, and architectural style of the time they were made. They also may have a significant historic value in their in their own right. This is especially true for early windows that were not double glazed door repairs in timber-framed buildings, where the great majority were merely a series of openings within the frame that were subdivided horizontally into mullions and vertical wood or iron bars to keep out intruders.

Traditional timber window joinery can be a stunning feature of a building and it is important to keep it looking good. As soon as you notice any signs of decay due to moisture penetration it is essential to stop it. This is best done by a thorough painting process, 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 adhere to the manufacturer's recommendations for preparation and number of coats at each stage.

The fungus that causes wet rot can quickly spread in old windows made of timber. To stop this from happening, take out any damaged or rotten components as quickly as you can. The replacement of wood that is rotting should be carefully undertaken by using a slow-growing deal (pine) and, whenever possible, the same species as that which is being removed to avoid shifting between the new section and existing timbers.

In the late the 17th and early the medieval periods, glass became more affordable and abundant, and the openings for glazed glass in timber-framed structures gradually became more sophisticated with wooden tracery moulded mullions, moulded mullions, and deep projection cills. In the past, more often, the glass was laid within rebated frames and secured with 'glazing sprigs' rather than into lead cames. This method of glazing not only makes the windows less likely to leak, but also allows for more clear glass sheets to be utilized than would have been feasible without the use of leaded lights.

Energy efficiency

Traditional timber windows have an excellent energy performance due to their thickness and multi-layer construction, as well as meticulous attention to detail. The large glass areas, the deep projection cills and wide glazing areas reduce air infiltration. With secondary glazing and draughtproofing, windows can be made more efficient to improve their energy efficiency. However it is crucial to keep in mind that any such measures should be evaluated in relation to the overall quality and appearance of the window in its original form.

It is sensible to fix or upgrade windows, rather than replacing them, particularly when improvements in energy efficiency can be made by simple upvc door repairs. Older windows typically have a historical value that illustrates a variety of technical development and changes in architectural style. Most people think that the windows will need to be replaced in the near future. However, many of them are still in service for 150,200, and even 250 years with proper maintenance.

It is important to recognise that the decay issues that are caused by traditional timber windows can be prevented by regular maintenance and swift repairs. In addition it is crucial to spot damp penetration issues and fix them promptly to avoid major damage. Paint deterioration that occurs early can be a problem because it allows moisture to penetrate into the wood, causing wet rot. It is not uncommon for this damage to go undetected until the paintwork begins to crack or becomes wavier. However, it could cause structural damage and then 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 mould and condensation. The use of modern synthetic paints can pose a problem since they are typically designed to be water-resistant and this can cause the growth of mildew in the professional window repair frame.

The majority of windows from the past were constructed of sapwood-rich timber. These timbers deteriorate quickly if exposed to rain, however they can be protected with a thorough preservation treatment before use. It is important to choose the appropriate type of wood for the site and climate, as these factors can affect the durability of the joinery. Local window manufacturers have various types of sash timbers that can be customized to fit historic openings. They can be built to the standard Boston pattern dimensions, or to custom sizes that are in keeping with the historic architecture.

Maintenance

The life span of windows made from timber can be extended significantly through regular inspections, careful redecoration and timely repair. The main cause of decay is moisture leaking through deteriorated paint and putty. This can be prevented by using a quality wood preservative and thoroughly painting the wood.

It is essential that repairs to the old sash and casement windows are well executed and completed without causing any disturbance. Many traditional timber window designs can be repaired without dismantling the frame, and this method should be used whenever it is possible. Peeling or loose paint must be removed with care and sanded lightly to improve the "key" of the surface and facilitate a better adhesion of the new coating. Be careful to avoid stripping old paint layers which could have historical value If these are present, it is recommended that a paint analysis be conducted.

If a piece of wood has rotted, the best solution is to take it off and replace it with timber inserts designed to match existing profiles. The timber inserts should be treated using wood preservative and the junction between masonry sub-cill and timber cill should be sealed.

Replacement of traditional windows using PVC-u can be an appealing option, particularly when the installer provides a 'one stop shop' installation that handles both removal and replacement within one day. It is crucial that installers of replacement windows are aware of the history and design of traditional timber frames. This will allow them to make the appropriate suggestions for energy efficiency improvements and other technical upgrades that won't harm the historical character of a building. Anyone who installs replacement windows should be registered with a Competent Persons Scheme such as FENSA. This will ensure the replacements are deemed to be approved in accordance with Building Regulations as a suitable alternative. It is, of course, possible for a skilled and experienced carpenter to install PVC-u windows that match the character of the building originally. This is especially relevant when windows are situated within listed buildings or conservation areas.