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Maintaining Timber Windows

A well-maintained timber window is an important part of the historic fabric of a structure. It reflects, in various degree the materials and techniques of the time in which it was made, the craftsmanship and architectural taste.

When possible, repairs should be made on-site. Repair systems made of resin can be used to repair the most damaged areas of decay without removing the entire window.

Durability

The timber windows in many historic buildings were built to last for a long time. They do require maintenance to ensure they look good. Maintenance tasks include repairs to sash cables as well as tightening the pulleys on sash, and painting. There is also a rising demand to upgrade the timber windows to increase the efficiency of energy. This can include replacing old glazing units, repairing existing window rebates, or installing new cills to improve air seal.

A key problem with traditional windows is damage caused by corrosion of the paintwork. This is particularly important when sash windows are involved as the gaps between sashes can be extremely large. In these situations, water can penetrate the paint film and cause rotting of the putty as well as underlying wood. The rotting process can be made worse due to weather conditions that are poor. To prevent this from happening, windows should be regularly painted with an exterior wood paint.

Areas that have been damaged must be repaired with a resin-based product. This will ensure that the maximum possible amount of the original fabric is preserved. It is also important to reduce the number of holes you drill into the frame to allow cable entry since these could let in water and cause decay.

Another significant problem with older windows is structural movement in the wall that can lead to deformation of the frame and the sash. This can lead to the sash not fitting properly and jamming or sticking to the opening and broken glazing. This can be corrected often by fitting new sash frames constructed of slow-grown deal (pine), or oak. The cill needs to be constructed from a sturdy hardwood, such as oak, to prevent the movement of new and old work.

To help reduce this problem to reduce the risk of this happening, there are a variety of companies that make Boston pattern sash made of wood that will fit most existing openings. They are available in a variety of sizes and finishes to suit the requirements of the modern homeowner. These sash are coupled with quadruple draft strips and improved thermal insulation can significantly improve the efficiency of a home's energy use.

Aesthetics

A lot of old timber frames possess a dazzling aesthetic appeal, since they reflect, in some shape, the materials technology, design, and style of the time they were constructed. They also may have a significant historic value in their individual cases. This is particularly true for early windows that were not glazed in timber-framed buildings, in which the majority were simply a series openings in structural frames subdivided horizontally by mullions and vertical wood or iron bars to protect against intrusions.

It is crucial to maintain the appearance of traditional timber Window Lock Repairs joinery. It is vital that any decay caused by moisture penetration should be stopped as soon as it is identified. This can be done by applying a thorough coat of paint, particularly in areas in which there is already damage or degradation. It is advisable to use paints that are designed to be used as part of the system (primer as well as undercoat, finish and primer) and follow the manufacturer's instructions in terms of preparation and the amount of coats required at each stage.

The fungus responsible for wet rot can spread quickly in old windows made of timber. To stop this from happening, remove any damaged or rotten components as promptly as you are able to. Replace the wood that is rotting with slow-growing deal (pine), and if possible, the same type of timber as the one being removed to prevent the possibility of differential movement.

Glass became more affordable and abundant during the late medieval period and into the 17th century. This led to the openings for glazed windows on timber-framed houses were more elaborate, with moulded mullions and traceries, made of wood and deep projecting cills. In the past, more often, the glass was set 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 and also allows larger sheets of glass to be employed than would be possible without the use of led lights.

Energy efficiency

Traditional timber windows have excellent energy efficiency due to their thickness, multi-layer construction and very careful attention to detailing. They also have large glass areas and deep projecting cills that minimise air infiltration. With secondary glazing and draughtproofing, the windows can be improved to increase their energy efficiency. However it is essential to keep in mind that any such measures should be viewed in relation to the overall integrity and appearance of the original window.

As a result, retaining old windows that are in need of repair rather than replacing them is logical, particularly when their thermal improvements can be achieved cost-effectively through simple repairs and upgrades. Older windows typically have an historic value that demonstrates a range of technical development and changes in architectural taste. Many people believe that the windows will need to be replaced in the near future. However, most can still provide service for 150,200, and even 250 years if they are maintained with proper maintenance.

It is important to recognize that decay issues associated with traditional timber windows can be avoidable with timely and thorough repairs. Additionally it is crucial to spot damp penetration issues and to remedy them quickly to avoid serious damage. The early deterioration of paint is a concern because it allows moisture to get into the wood, leading to wet rot. The damage is usually not noticed until the paintwork is cracking or wavy but it can cause severe structural damage, and could lead to further decay.

A good quality paint will stop this moisture penetration. It is also necessary to keep the paintwork in good condition to avoid condensation and the growth of mould. Modern synthetic paints are problematic because they are often water-resistant and may cause mildew growth in the window repairs cambridge frame.

The majority of older windows were manufactured from timber containing an extensive proportion of sapwood. These timbers are susceptible to deterioration quickly when exposed to wet weather conditions, but they can be protected with a thorough preservative treatment before they are put to use. It is essential to select the appropriate type of wood for the site and climate, as these factors can affect the longevity of the joinery. Local window manufacturers offer an array of sash made from timber that can be made to fit the historic openings. They can be constructed according to the standard Boston pattern dimensions or to custom sizes that fit with the historic architecture.

Maintenance

The life span of windows made from timber can be extended considerably by regular inspection as well as a careful redecoration and prompt repair. The major cause of decay is moisture leaking through deteriorated paint or putty. This can be avoided with careful painting and the use of a good quality wood preservative.

It is important that repairs to old sash or casement windows are properly executed, and carried out without causing any disturbance. It is possible to repair several traditional designs of timber windows without removing the frame. This should be done whenever possible. Loose or peeling paint should be removed with care and sanded lightly to increase the key of the surface and facilitate an easier adhesion of the new coating. It is essential to avoid removing old paint layers, which may have historical significance.

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

Replacement of traditional windows with PVC-u is an appealing option, particularly when the installer provides an "all-in-one" installation service that can handle both removal and replacement within the span of a day. It is crucial that installers of replacement windows are aware of the history and construction of traditional timber frames. This will enable them to make appropriate suggestions for energy efficiency improvements and other technological upgrades that won't harm the character of a historic building. Those who provide replacement windows should be registered with a Competent Persons Scheme like as FENSA. This will ensure that the replacements are approved as a suitable option under Building Regulations. A skilled carpenter is able to install PVC-u windows that conform to the original building's style. This is particularly true where windows are situated in listed buildings and conservation areas.