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Maintaining Timber Windows

A well-maintained wooden window doctor is an important component of a historical building. It demonstrates in various degrees the different materials and technologies design, craftsmanship and aesthetics of the period from which it dates.

If possible, repairs should be made in-situ. Repairing the most deteriorated areas of decay is possible by using specialized resin-based systems.

Durability

Timber windows were made to last for hundreds of years. They require regular maintenance to keep them looking good. The most common maintenance tasks are repairs to sash-cords, re-tightening sash pulleys, and painting. There is also a growing demand to upgrade timber windows to improve energy efficiency. This could mean replacing old glass units, repairing existing upvc doors repairs window doctor cambridge lock repair (willysforsale.com) rebates, or installing new cills that allow for improved air sealing.

A key problem with traditional windows is damage caused by corrosion of the paintwork. This is particularly important in the case of sash windows, as the gaps between sashes can often be very large. In these situations water may get through the paint film and cause rotting of the putty and underlying wood. The rotting may be further aggravated by weather conditions that are not ideal. To prevent this windows, they should be painted regularly using a suitable exterior wood paint.

In addition to repainting, areas that have corroded should be repaired with an adhesive-based repair product. This will ensure that the maximum amount of original fabric is preserved. It is also essential to limit the number of holes you drill into the frame to allow cable entry since these could let in water and cause decay.

The wall's structural movement could also cause distortions in the frame as well as the sash. This could result in the sash not fitting properly and jamming or sticking to the opening and broken glazing. This can be fixed frequently by putting in new sash frames made of slow-grown deal (pine), or oak. The cill needs to be constructed of a strong hardwood like oak, to avoid differential movement between new and older work.

To alleviate this issue, there are now a variety of companies that make Boston pattern sash made of wood that will fit into the majority of existing openings. These sash come in various sizes and finishes that will suit the needs of modern homeowners. The new sash, combined with quadruple draft strips and improved thermal insulation can make a significant difference to the efficiency of a home's energy use.

Aesthetics

A lot of old timber frames have a great aesthetic appeal, since they reflect, in some form, the quality of the wood, technology, and architectural style of the time they were made. They may also have a significant historic value in their individual cases. This is particularly true of windows that were unglazed in the early days of timber-framed structures, where the majority were series of openings in structural frames that were subdivided horizontally by mullions and vertical wood or iron bars to keep out intrusions.

It is important to maintain the appearance of traditional wooden window joinery. It is crucial that any decay that results from the penetration of moisture should be stopped as soon as it is identified. It is recommended to do this through thorough painting, especially if there has been damage or degradation. It is best to choose paints that are intended to be used in a set (primer undercoat and finish) and follow the manufacturer’s recommendations for preparation and number coats at each stage.

Wet rot is a typical problem for old timber windows and the best way to stop it growing is to eliminate sections that are damaged or rotten as soon as you can to stop the spread of the fungus responsible for it. Replace rotting wood with slow-grown deal (pine) and, should it be possible, the same type of wood as the one that is being removed, to prevent the possibility of differential movement.

In the late medieval and 17th century periods glass became cheaper and more abundant, so that the glazed openings in timber-framed buildings gradually became more elegant with wooden tracery, moulded mullions and deep protruding 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 wider sheets of clearer glass to be employed than would be possible otherwise 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. The large glass surfaces, the deep projecting cills and large glazing areas help to reduce air infiltration. With secondary glazing and draughtproofing windows can be upgraded to increase their energy efficiency. However it is essential to remember that such measures should be viewed in terms of the overall integrity and appearance of the original window.

Therefore, keeping old windows that are in need of repair rather than replacing them makes sense especially when their thermal improvements can be achieved economically through simple repairs and upgrades. Historic windows are often of historical value, as they show a range in technological advancements and changes to architectural taste. Most people assume that these windows will need to be replaced in the near future. However, many of them will last for 150,200, and even 250 years if they are maintained with proper maintenance.

It is crucial to understand that decay issues associated with traditional timber windows are easily prevented with timely and thorough repairs. It is also crucial to identify damp problems and fix them quickly in order to avoid major damage. Early paint deterioration is a major issue, because it allows moisture to penetrate the wood and cause wet rot. The damage is usually not evident until the paintwork becomes damaged or wavy, but can cause significant structural damage, and could lead to further decay.

A good paint will prevent moisture penetration. To prevent mould and condensation it is crucial to keep the paintwork as clean as possible. Modern synthetic paints pose a challenge since they are usually water-resistant and can cause mildew to grow within the window frame.

Most older windows were made from sapwood-rich wood. The timbers will deteriorate rapidly if exposed to rain, however they can be protected with an extensive preservation treatment prior to use. It is important to choose the appropriate type of wood for the site and climate, as these variables can affect the longevity of the joinery. Local window manufacturers make a variety of timber sash that can be tailored to fit specific historic openings. They can be built to the standard Boston pattern dimensions or to specific sizes that fit with the historic architecture.

Maintenance

Regular inspection as well as careful redecoration and quick repairs can prolong the lifespan of windows made of timber. The primary reason for decay is the infiltration of moisture through the deterioration of paint and putty. This can be prevented by thorough painting and using an excellent wood preservative.

It is crucial that repairs to old sash or casement windows are properly executed and completed with the minimum disturbance. It is possible to fix 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 surface to improve the "key" of the surface. This will enable the new coating to adhere better. It is important to avoid removing old paint layers, which may have historical significance.

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

It's tempting to replace traditional windows with PVC u, especially when the installer offers an installation that includes both replacement and removal in a single 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 allow them to make the right suggestions for improvements to energy efficiency and other technical upgrades that do not alter 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 replacement windows are approved as a suitable option under Building Regulations. It is certainly possible for an experienced and skilled carpenter to install PVC-U windows that are sympathetic to the character of the building originally. This is especially relevant when windows are in conservation areas or listed buildings.