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Maintaining Timber Windows

A well-maintained wooden window is a crucial part of a historic building. It reflects, in various degree the technology and materials of the time period it was constructed, as well as the craftsmanship and architectural taste.

If possible, repairs should be made in-situ. Repairing the worst areas of decay can be accomplished using proprietary resin-based systems.

Durability

Timber windows were designed to last for centuries. They do require some maintenance to keep them looking great. Maintenance tasks include sash cord repairs, retightening of sash pulleys and painting. The demand for upgrading windows made of timber to improve efficiency and energy efficiency is also increasing. This can involve replacing old glazing units, repairing the window rebates that are in place, or installing new cills that allow for better air sealing.

One of the main issues with traditional windows is damage caused by corrosion of the paintwork. This is especially important where windows made of sash are involved because the gaps between the sashes can be extremely wide. In these instances water can enter the paint film and cause rotting of the wood or putty beneath. The rotting process can be made worse by poor weather conditions. To prevent this windows from becoming rotten, they must be painted regularly using an exterior wood paint that is suitable.

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 original fabric is preserved. It is also essential to limit the number of holes you drill into the frame to allow cable entry, as they could let in water and cause decay.

Another significant problem with older windows is the structural movement within the wall that can cause deformation of the frame and the sash. This can lead to sash no longer fitting correctly, sticking or jamming in the opening and cracked glazing. This can be corrected often by putting in new sash frames constructed of slow-growing deal (pine) or oak. The cill must be constructed from durable hardwood such as oak to avoid differential movement between the old and new work.

There are now several companies that produce Boston pattern wooden sash that fit in with the majority of openings. These sash come in a variety of sizes and finishes to meet the requirements of modern homeowners. Combined with quadruple draught strips and improved thermal insulation, these new sash options can make an enormous difference to the energy efficiency of a home.

Aesthetics

Many old wooden windows have an excellent aesthetic value as they often show, in a particular way the materials and technologies and architectural taste of the period from when they were built. They also may have significant historical value in their individual cases. This is particularly true of windows that were unglazed in the early days of timber-framed buildings, where the great majority were merely a series of openings in the frame, which were divided horizontally into mullions and iron or wood bars to deter intruders.

It is essential to preserve the appearance of traditional wooden window replacement cambridge joinery. It is essential that any decay resulting from the penetration of moisture should be stopped as soon as it is discovered. It is recommended to do this by thorough painting, especially where there has been damage or degradation. It is advisable to use paints designed to be used as part of a system (primer undercoat, finish) and to follow the manufacturer's recommendations in relation to preparation and the amount of coats required at each stage.

The fungus that causes wet rot is able to spread quickly in old timber windows. To prevent this, get rid of any damaged or rotten parts as promptly as you are able to. Replace the wood that is rotting with slow-growing deal (pine) and, should it be possible, the same kind of timber as the one that is being removed, to prevent any differential movement.

In the late the 17th and early the medieval periods, glass became more affordable and plentiful so that double glazed door seal repairs openings in timber-framed buildings gradually became more elegant with wooden tracery moulded mullions, moulded mullions, and deep projection cills. Increasingly, the glazing was placed within frames with rebates and pinned in with 'glazing sprigs', rather than being inserted into lead cames. This method of double glazing near me not only makes windows less likely to leak and also allows wider sheets of clearer glass to be utilized than would have been feasible without the use of leaded lights.

Energy efficiency

Traditional timber windows have excellent energy efficiency due to their thickness and multi-layer construction, as well as careful attention to detailing. They also have large glass areas and deep projecting cills that reduce air infiltration. The windows can be modified to increase their energy efficiency by draught-proofing and secondary glazing. It is crucial to remember that these measures need to be considered in relation to the overall integrity and appearance of the original windows.

Therefore, keeping existing historic windows that require repair instead of replacing them is logical especially when their thermal enhancements can be achieved inexpensively with simple repairs and improvements. Historic windows often have an historic value that illustrates a variety of technical development and changes in architectural tastes. The pressures to replace such windows are typically based on the assumption that windows of the past will require replacement in the near future, but the majority of them are in a position to last for 150, 200 or even 250 years if they are properly maintained.

It is essential to realize that decay issues in traditional timber windows are easily prevented with timely and thorough repairs. In addition it is vital to identify damp penetration problems and fix them promptly to prevent serious damage. Early paint deterioration can be a problem because it allows moisture to penetrate into the wood, leading to wet rot. It is not uncommon for this damage to go undetected until the paintwork begins to crack or becomes curly. However, it can cause structural damage and then further decay.

A high-quality paint will prevent this moisture from entering. To prevent mould and condensation it is essential to keep the paintwork as clean as you can. Modern synthetic paints pose a problem since they are usually water-resistant, and can cause mildew growth within the window frame.

The majority of windows from the past were constructed from sapwood-rich wood. These timbers can deteriorate very rapidly if exposed to wet weather, however they can be protected by a thorough treatment of preservative before they are put to use. It is also important to ensure that the type of timber used is well-suited to the site and climate conditions, since these factors affect the durability of the joinery. Local Window maintenance manufacturers make various types of timber sash that can be customized to fit specific historic openings. They can be constructed to the standard Boston pattern dimensions or to specific sizes that are in keeping with historic buildings.

Maintenance

The life of timber windows can be extended significantly by regular inspection as well as a careful redecoration and prompt repair. The primary reason for the decay is moisture intrusion through deteriorated paint and putty. This can be avoided by using a good wood preservative and painting the wood thoroughly.

It is crucial that repairs to the old sash and casement windows are well executed, and carried out without causing any disturbance. It is possible to repair many traditional timber window designs without taking the frame off. This should be done whenever possible. Remove loose or peeling paint and then lightly sand the surface to improve the "key" of the surface. This will enable the new coating to stick better. Be careful to avoid stripping paint layers that could have historical value If these are present, it is recommended that a paint analysis be carried out.

When a section of wood has rotted the best way to deal with it is to remove it and replace it with timber inserts shaped to match existing profiles. The inserted timber should also be treated using wood preservative. The junction between the masonry sub-cill and the timber cill should be sealed.

It can be tempting to replace traditional windows with PVC u, particularly when the installer provides an installation that includes removal and replacement in one day. It is, however, vital that the installer of windows replacement has a thorough understanding of the construction and history of traditional timber frames. This will allow them to make the appropriate suggestions for energy efficiency improvements and other technological upgrades that won't harm the historical character of a building. Those providing replacement windows should be registered with a Competent Persons Scheme like FENSA. This will ensure that replacement windows are deemed acceptable in accordance with Building Regulations as a suitable option. A skilled carpenter can put in PVC-u windows that are suited to the original building's style. This is especially true where the windows are located in listed buildings and conservation areas.