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Maintaining Timber Windows

A well-maintained wooden upvc window lock repair is a crucial part of a historic building. It reflects in varying degrees, the materials and technologies of the time in which it was made, the design and craftsmanship.

Whenever possible repairs to existing windows should be made in situ. Repairing the most severe areas of decay can be accomplished using proprietary resin-based systems.

Durability

The windows made of timber in many historic buildings were built to last for hundreds of years. They do require some maintenance to keep them looking good. The most frequently-asked maintenance tasks include repairs to sash cords as well as tightening sash pulleys and painting. There is also a rising demand to upgrade timber windows to improve energy efficiency. This may 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 important when windows with sash are involved since the gaps between sashes can be quite large. In these situations, water can penetrate paint film and cause rotting of the putty or wood beneath. The weather can be a factor in accelerating the decay. To prevent this, windows should be regularly painted with an exterior wood paint that is suitable.

In addition to repainting, corroded areas need to be repaired with a resin-based repair product. This will ensure that the maximum amount of original fabric is preserved. It is essential to limit the number of holes that are made into the frame to allow cable entry, as these can admit moisture and cause decay.

Another issue with older windows is the structural movement within the wall which can cause deformation of the frame and sash. This can result in sash no longer fitting correctly and jamming or sticking to the opening and cracked glazing. This is often corrected by fitting new frames for sash made of slow-grown deal (pine), or oak. The cill should be made from durable hardwood such as oak to avoid any movement between the new and existing work.

There are now several companies that manufacture Boston pattern wooden sash to fit into the majority of existing openings. They are available in various sizes and finishes that will meet the requirements of modern-day homeowners. In conjunction with quadruple draught strip and better thermal insulation these new sash can make significant improvements to the energy efficiency of a home.

Aesthetics

A lot of old timber frames possess a dazzling aesthetic appeal because they reflect, in some form, the materials technology, the construction process, and the architectural aesthetics of the time they were constructed. They could also have significant historical value in their individual cases. This is especially true of early unglazed window openings in timber-framed structures, where the great majority were just a collection of openings in the frame that were subdivided horizontally into mullions and vertical iron or wood bars to deter invaders.

Traditional window joinery made of timber can be a stunning feature of a building and it is important to maintain its appearance. It is essential that any decay resulting from water penetration is stopped as soon as it is recognised. This is best accomplished by applying a thorough coat of paint, particularly in areas in which there is already damage or deterioration. It is advisable to use paints specifically designed to be used as part of a system (primer, undercoat and finish) and to follow the manufacturer's recommendations regarding preparation and number of coats needed at each stage.

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

In the late period of the 17th century and the middle of the medieval period, glass became cheaper and more abundant, and the openings for double glazed door repairs glass in timber-framed structures gradually became more sophisticated, with tracery made of wood moulded mullions, moulded mullions, and deep projecting cills. The glazing was increasingly set within rebated frames and then pinned by 'glazing sprigs' rather than being inserted into lead cames. This method of glazing not only makes the windows less likely to leak and break, but also allows more clear glass sheets to be employed than would be possible otherwise without the use of led lights.

Energy efficiency

Traditional timber windows offer excellent energy efficiency due to their thickness and multi-layer construction, as well as meticulous attention to detail. They also feature large glass areas and deep projecting cills that reduce air infiltration. The windows can be made to increase their energy efficiency through draughtproofing and secondary glazing. However it is crucial to keep in mind that these measures must be considered in the context of the overall quality and appearance of the original window.

So, retaining the existing windows from the past that are in need of repair instead of replacing them makes sense particularly when thermal enhancements can be achieved economically through simple repairs and upgrades. Older windows typically have an historic value that illustrates a variety of technical development and changes in architectural tastes. The pressures to replace such windows are generally based on the assumption that windows that are old will need to be replaced in the near future, however most are still capable of providing service for 150, 200 or even 250 years if properly maintained.

It is important to recognize that decay issues with traditional timber windows can be avoidable with timely and thorough repairs. Additionally it is vital to spot damp penetration issues and to remedy them quickly to avoid major damage. Early deterioration of paint is a major problem since it allows moisture penetrate the wood and cause wet rot. This type of damage is typically not noticed until the paintwork becomes cracking or wavy but it can cause severe structural damage and can lead to further decay.

A good paint will stop moisture from entering the paint. To prevent condensation and mould it is essential to keep the paintwork as clean as you can. Modern synthetic paints can pose a problem since they are typically designed to be water-resistant and this can result in the formation of mildew within the window frame.

The majority of windows from the past were constructed from sapwood-rich timber. The timbers will deteriorate rapidly if exposed to wet weather, but can be protected with a thorough treatment of preservative before they are put to use. It is also essential to ensure that the type of timber used is well-suited to the climate and site conditions, as these elements will influence the durability of the joinery. Local window repair specialists manufacturers produce various types of timber sash that can be tailored to fit specific openings from the past. They can be built to the standard Boston pattern dimensions, or to custom sizes that fit with the historic architecture.

Maintenance

Regular inspections, careful redecoration, and timely repairs can prolong the lifespan of windows made of timber. The most common reason for decay is moisture intrusion through the deterioration of paint and putty. This can be prevented by using a high-quality wood preservative and thoroughly painting the wood.

It is essential that repairs to the old sash and casement windows are properly executed and completed with the minimum disturbance. It is possible to fix several traditional designs of timber windows without removing the frame. This should be done whenever possible. Peeling or loose paint must be removed with care and sanded lightly to improve the key of the surface and facilitate an improved adhesion of the new coating. It is crucial to avoid removing old paint layers, as they may have historical significance.

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

Replacement of traditional windows with PVC-u can be a tempting option, especially when the installer provides a "one-stop shop" installation service that can handle removal and cambridge replacement windows in one day. It is, however, vital that the installer of windows replacement has a thorough understanding of the construction and history of traditional wooden frames. This will allow them to make the right recommendations for energy efficiency improvements and other technical improvements that do not alter the historic character of a building. The window repair installers who provide replacement windows must be registered with a Competent Persons Scheme such as FENSA. This will ensure that replacement windows are deemed to be approved in accordance with Building Regulations as a suitable alternative. It is, of course, possible for an experienced and skilled carpenter to install PVC-U windows that fit the style of the building originally. This is especially true where the windows are located in listed buildings or conservation areas.