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Maintaining Timber Windows

A well-maintained and maintained timber window is an important part of the historic fabric of a building. It illustrates in varying degrees the materials and technologies as well as the craftsmanship and architectural style of the period from which it originates.

If possible, repairs should be done in-situ. Repairing the worst areas of decay can be done by using specialized resin-based systems.

Durability

Timber windows were made to last hundreds of years. However, they do need to be maintained to ensure that they look good and functioning correctly. The most common maintenance tasks are repairs to sash-cords and re-tightening the sash pulleys and painting. The need to upgrade windows made of timber to improve energy efficiency is also growing. This can involve replacing old glazing units, repairing the window repair near me rebates that are in place or putting up new cills to allow for improved air sealing.

The deterioration of paintwork is a major issue with traditional windows. This is particularly important when sash windows are concerned as the gaps between sashes can be extremely large. In these cases water can get into paint film and cause rotting of the wood or putty underneath. Weather conditions that are not ideal can accelerate the decay. To prevent 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 that the maximum amount of the original fabric is preserved. It is essential to limit the number of holes drilled in the frame to allow cable entry since they can let in moisture and cause decay.

The structural movement of the wall can also lead to deformations in the frame and the sash. This can lead to the sash not fitting properly or sticking or jamming into the opening and broken glazing. This is often corrected by putting in new sash frames made of slow-growing deal (pine) or oak. The cill needs to be constructed of a strong hardwood like oak, in order to prevent any shifting between the new and old work.

To help reduce this problem to reduce the risk of this happening, there are a number of companies who make Boston pattern wooden sash that will fit most existing openings. The sash is available in a variety of sizes and finishes that suit the needs of modern homeowners. Together with quadruple draught strips and improved thermal insulation, these new sash options can make significant improvements to the energy efficiency of a house.

Aesthetics

A lot of old timber frames have a great aesthetic appeal because they reflect, in some form, the quality of the wood technology, design, and aesthetics of the time they were constructed. They could also have a significant historic value in their individual cases. This is especially true of early windows that were not double Glazed door repairs in timber-framed buildings, in which the majority were series of openings in structural frames subdivided horizontally by mullions with vertical wood or iron bars in order to protect against invaders.

It is important to maintain the appearance of traditional timber window joinery. It is essential that any decay resulting from moisture penetration should be removed as soon as it is recognised. It is recommended to do this with thorough painting, especially where there is damage or degradation. It is recommended to use paints designed to be used in a system (primer undercoat and finish), and to follow the manufacturer's guidelines for preparation and number coats at each stage.

Wet rot is a common issue in old timber windows. The best method to stop it from developing is to remove any damaged or rotten sections as soon as possible to prevent the spread of the fungus that causes it. Replace rotting wood with slow-growing deal (pine), and should it be possible, the same type of timber as the one that is being removed to prevent any differential movement.

Glass became less expensive and Double glazed door repairs more abundant during the late medieval period and into the 17th century. As a result, glazed openings on timber-framed houses became more complex with moulded mullions, wooden tracery and deep cills projecting into the air. In recent times, glass was fixed into frames that were rebated with glazing sprigs, not lead cames. This method of glazing is not only less susceptible to leaks, but it can allow for more expansive and clearer sheets of glass to be used in windows than would be possible without the need for lead lights.

Energy efficiency

The traditional timber windows are energy efficient because of their thickness and multilayer construction as well as care for detail. The large glass areas, deep projecting cills and large glazing areas reduce air infiltration. The windows can be made to improve their energy efficiency through draughtproofing and secondary glazing. However it is essential to keep in mind that any such measures should be evaluated in the context of the overall appearance and integrity of the window in its original form.

It is logical to fix or upgrade historic windows rather than replace them, particularly when improvement in energy efficiency can be made by simple repairs. Historic windows often have a historical value that illustrates a variety of technological advances and changes in architectural tastes. The pressures to replace such windows are usually based on the assumption that windows that are old will need to be replaced in the near future, however they are capable of providing service for 150, 200 or even 250 years if they are properly maintained.

It is crucial to understand that decay problems with traditional timber windows are avoidable with timely and thorough repairs. It is also important to spot damp issues and fix them quickly to avoid major damage. Early paint deterioration is a particular problem, because it allows moisture to penetrate the wood and cause wet rot. This type of damage is typically not noticed until the paintwork becomes wavy or cracked but it can cause severe structural damage and lead to further decay.

A high-quality paint will stop this moisture from entering. To prevent condensation and mould, it is important to keep the paintwork as clean as possible. Modern synthetic paints are problematic because they are water-resistant and may cause mildew growth in the window frame.

The majority of windows from the past were constructed from sapwood-rich wood. These timbers are susceptible to deterioration quickly when exposed to moist weather, however they can be preserved with a thorough treatment of preservative before they are used. It is crucial to select the right type of wood for the site and climate, as these variables can affect the durability of the joinery. Local window installation cambridge manufacturers produce a variety of timber sash that can be tailored to fit specific openings from the past. They can be made according to the standard Boston pattern dimensions or to specific dimensions that are compatible with the architectural style of historic buildings.

Maintenance

Regular inspection as well as careful redecoration and prompt repairs can extend the life of timber windows. The main reason for the decay is moisture intrusion through deteriorated paint and putty. This can be avoided with careful painting and using a good quality wood preservative.

It is important that repairs to old sash or casement windows are done correctly and completed with the minimum disturbance. It is possible to repair the majority of traditional wooden window designs without having to remove the frame. This should be done whenever possible. Remove 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. Care should be taken 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.

When a piece of wood is rotten, the best course of action is to eliminate the rotten material and replace it with spliced-in inserts that are shaped to match existing profiles. The wood that is being inserted should be treated with a wood preservative and the joint between the cill for timber and the sub-cill of the masonry should be sealed.

Replacement of traditional windows with PVC-u can be an attractive option, especially when the installer provides a 'one stop shop' installation that handles both removal and replacement within the span of a day. However, it is essential that the person installing cambridge windows and doors replacement has a thorough understanding of the construction and history of traditional timber frames. This will enable them to make the appropriate suggestions for energy efficiency improvements and other technological upgrades that won't harm the character of a historic building. The window installers who provide replacement windows must be registered with a Competent Persons Scheme such as FENSA. This will ensure that the replacement windows are approved as a suitable solution under Building Regulations. A skilled carpenter can put in PVC-u windows that conform to original building's character. This is especially applicable when windows are located within conservation areas or listed buildings.