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Maintaining Timber Windows

A well-maintained wooden window is an important component of a historical building. It demonstrates in various degrees the materials and technologies as well as the craftsmanship and architectural style of the time period that it was built in.

When repairs are feasible to cambridge windows that are already in use should be carried out in-situ. Proprietary resin-based repair systems can be used to repair the most deteriorated areas without having to remove the entire window.

Durability

Timber windows were made to last hundreds of years. They do require maintenance to keep them looking good. Maintenance tasks include sash cord repairs and retightening pulleys on sash, and painting. There is also a growing demand for upgrading timber windows to improve energy efficiency. This can include replacing old glazing units, repairing the window rebates that are in place or installing new cills for improved air seal.

The corrosion of paintwork is a major problem with traditional windows. This is particularly true when sash windows are involved as the gaps between the sashes can be very wide. In these situations water can enter the paint film and cause rotting of the putty or wood beneath. Poor weather conditions can exacerbate the rotting. To stop this from happening windows from becoming rotten, they must be painted regularly with an exterior wood paint that is suitable.

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

Another significant problem with older windows is the structural movement within the wall that can lead to deformation of the frame and the sash. This can lead to the sash fitting incorrectly and jamming or sticking into the opening, and even broken glass. This is often corrected by putting in new frames for sash made of slow-growing deal (pine) or oak. The cill should be constructed from durable hardwood such as oak to avoid any movement between the old and new work.

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

Aesthetics

Many old timber windows have a high aesthetic value because they typically demonstrate, in a way the materials and technologies and architectural style of the period from when they were built. They could have significant historical significance as a set. This is particularly true for windows that were unglazed in the early days of timber-framed buildings, in which the majority were series openings in frames of structural construction, which were divided horizontally by mullions, and vertically by iron or wood bars to protect against intrusions.

It is essential to preserve the appearance of traditional wooden window joinery. As soon as you see any signs of decay caused by water penetration it is essential to stop it. It is recommended to do this through thorough painting, especially if there has been damage or deterioration. It is best 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 of coats at each stage.

The fungus that causes wet rot can quickly spread in old timber windows. To prevent this, take out any damaged or rotten components as quickly as you can. The replacement of rotting wood should be carefully undertaken by using a slow-growing deal (pine) and, wherever feasible using the same species as that which is being removed in order to prevent any movement differences between the new and old timbers.

Glass became cheaper and more abundant during the late medieval period and into the 17th century. As a result, the openings for double glazed door seal repairs windows on timber-framed houses became more complicated with moulded mullions, tracery made of wood and deep cills projecting into the air. In recent years, glazing was fixed into 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 more clear glass sheets to be used than would have been possible otherwise without the use of lead lights.

Energy efficiency

Traditional timber windows provide a good energy performance due to their thickness and multi-layer construction. They also pay meticulous attention to detail. They also feature large glass areas as well as deep projecting cills that minimise air infiltration. The windows can be modified to increase their energy efficiency through draughtproofing and secondary glazing. It is essential to keep in mind that these measures should be considered in relation to the overall integrity and look of the original windows.

It is logical to repair or upgrade existing windows, rather than replacing them, particularly when improvement in energy efficiency can be made through simple repairs. Older windows typically have an historic value that illustrates a variety of technological advances and changes in architectural taste. Most people think that these windows will need to be replaced in the near future. However, they can still provide service for 150, 200 or even 250 years if they are maintained with proper maintenance.

It is essential to realize that decay issues associated in traditional timber windows are easily prevented with timely and thorough repairs. In addition it is crucial to spot damp penetration issues and fix them promptly to avoid serious damage. Early paint deterioration can be a problem because it allows moisture to penetrate into the wood, causing wet rot. It is not uncommon for this type of damage to go unnoticed until the paintwork starts to crack or turn wavier. However, it could cause structural damage and then further decay.

A paint of good quality will stop moisture from entering the paint. It is also necessary to keep the paintwork spotless to avoid condensation and mould growth. The use of modern synthetic paints could be a problem since they are typically formulated to be water-resistant, and this can cause the growth of mildew in the window frame.

The majority of cambridge windows and doors from the past were constructed of sapwood-rich timber. These timbers can deteriorate quickly when exposed to rain, but they can be preserved with an extensive preservation treatment prior to use. It is important to choose the appropriate type of wood for your location and climate, as these variables will affect the durability of the joinery. Local window manufacturers create various types of timber sash that can be tailored to fit specific openings in historic buildings. They are available in the standard Boston pattern or in custom sizes to fit historic buildings.

Maintenance

The life of timber windows can be extended considerably by regular inspection, careful redecoration and timely upvc door repair cost. The primary cause of decay is the infiltration of moisture through deteriorated putty and paint. This can be avoided with thorough painting and using an excellent wood preservative.

It is crucial that repairs to old sash and casement windows are well executed, and carried out with minimal disruption. It is possible to repair several traditional designs of timber windows without having to remove the frame. This should be done whenever possible. Remove peeling or loose paint and lightly sand the area to improve the 'key" of the surface. This will allow the new coating to stick better. It is important to avoid stripping paint layers that might have historical significance and if they are present, it is recommended that a paint analysis be conducted.

If a piece 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 a wood preservative. The junction between the masonry sub-cill and the timber cill should be sealed.

Replacement of windows made of traditional PVC-u may be an attractive option, especially when the installer offers an "all-in-one" installation that takes care of removal and replacement in a day. It is important that the installers of replacement windows have a thorough understanding 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 do not alter the historic character of a building. Anyone who installs replacement windows should 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 is able to install PVC-u windows that are suited to the original character of the building. This is particularly true where windows are installed in listed buildings or conservation areas.