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What Cambridge Window Experts Would Like You To Learn
Maintaining Timber Windows

A well-maintained wooden window is a crucial component of a historical building. It reflects in different levels, the technology and materials of the time in which it was constructed, the craftsmanship and architectural taste.


If possible, repairs 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 historical buildings were built to last for centuries. But, they have to be maintained to ensure that they look good and functioning correctly. Maintenance tasks include repairs to sash cords as well as tightening the sash pulleys and painting. The demand for enhancing timber windows to increase efficiency and energy efficiency is also increasing. This may include replacing old glazing units, repairing existing window rebates or installing new cills for improved air seal.

The deterioration of paintwork is a major issue with traditional windows. This is particularly important when sash windows are involved as the gaps between the sashes can be very wide. In these instances water can get into the paint film and cause decay of the putty and the wood beneath. Weather conditions that are not ideal can accelerate the rotting. To avoid this, windows should be painted regularly using a suitable exterior wood paint.

In addition to repainting, corroded areas must be repaired using an adhesive-based repair product. This will ensure that the greatest amount of original fabric retained. It is also essential to minimise the number of holes drilled into the frame for cable entry, as they could admit water and lead to decay.

Another significant problem with older windows is structural movement in the wall, which could cause deformation of the frame and sash. This could result in sash no longer fitting correctly and jamming or sticking to the opening and broken glazing. This can be corrected often by fitting new sash frames constructed of slow-growing deal (pine) or oak. The cill must be constructed of a durable hardwood like oak to avoid any movement between the existing and new work.

To help reduce this problem There are a number of companies who make Boston pattern sash made of wood that will fit into the majority of existing openings. The sash is available in a range of sizes and finishes to suit the needs of today's homeowner. Together with quadruple draught strips and a better thermal insulation, these new sash options can make an enormous difference to the energy efficiency of your home.

Aesthetics

A lot of old timber frames have a great aesthetic appeal, since they show, in some form, the quality of the wood, technology, and architectural style of the time they were constructed. They may have significant historical significance in their own right. This is especially true of early windows that were not glazed in timber framed buildings where the great majority were simply a series of openings within the structural frame sub-divided horizontally into mullions and vertical wood or iron bars to keep out invaders.

It is crucial to maintain the appearance of traditional wooden window joinery. When you spot any signs of decay due to water penetration it is essential to stop it. It is best to do this with thorough painting, particularly if there has been damage or degradation. It is recommended to use paints that are designed to be used as part of a system (primer, undercoat and finish) and to follow the manufacturer's recommendations in terms of preparation and number of coats needed at each stage.

The fungus that causes wet rot can quickly spread in old timber windows. To prevent this from happening, get rid of any damaged or rotten components as quickly as you can. The replacement of rotting wood should be carefully undertaken with a slow-growing deal (pine) and, wherever possible, the same species as that which is being removed to prevent differential movement between the new section and existing timbers.

Glass became cheaper and more abundant in the late medieval period and into the 17th century. In the process, the glazed openings in timber-framed homes became more complex with moulded mullions, tracery made of wood and deep cills projecting into the air. In recent years, glass was pinned into frames that were rebated with glazing sprigs instead of 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 without the use of led lights.

Energy efficiency

Traditional timber windows are energy efficient due to their thickness and multilayer construction as well as attention to detail. The large glass areas, the deep projection cills and wide glazing areas reduce air infiltration. repairmywindowsanddoors.co.uk can be designed to improve their energy efficiency through draughtproofing and secondary glazing. However, it is important to keep in mind that these measures should be evaluated in the context of the overall appearance and integrity of the window in its original form.

It makes sense to repair or upgrade existing windows, rather than replacing them, particularly when improvements in thermal efficiency can be made through simple fixes. Older windows are usually of historical value, as they reflect a variety of technical development and changes to the architectural style. Most people think that these windows will have to be replaced in the near future. However, many of them are still in service for 150,200, and even 250 years with proper maintenance.

It is crucial to understand that decay issues associated with traditional timber windows can be avoidable with timely and thorough repairs. It is also essential to spot damp issues and address them promptly in order to avoid major damage. The early deterioration of paint could be a problem as it allows moisture to get into the wood, leading to wet rot. This damage is often not noticed until the paintwork is wavy or cracked however, it can cause serious structural damage and lead to further decay.

A good paint will block moisture penetration. To prevent condensation and mould it is crucial to keep the paintwork as clean as possible. Modern synthetic paints are problematic because they are water-resistant and can cause mildew to develop within the window frame.

Most older windows were made of sapwood-rich timber. These timbers are susceptible to deterioration rapidly if exposed to wet weather, however they can be protected with a thorough treatment of preservative before they are used. It is important to choose the appropriate type of wood for the site and climate, as these factors will affect the durability of the joinery. Local window manufacturers make various types of timber sash that can be customized to fit specific historic openings. They are available in the standard Boston pattern or in custom sizes that can be adapted to historical structures.

Maintenance

Regular inspection as well as careful redecoration and timely repairs can prolong the lifespan of windows made of timber. The primary cause of wood decay is moisture leaking through deteriorated paint or putty. This can be avoided by careful painting and using an excellent wood preservative.

It is important that repairs to old sash or casement windows are done correctly and completed without causing any disturbance. Repairs can be made to several traditional designs of timber windows without removing the frame. This should be done whenever possible. Loose or peeling paint should be removed carefully and lightly sanded to improve the key of the surface, allowing for an easier adhesion of the new coating. It is important to avoid stripping paint layers that may have historic value If these are present it is recommended that a paint analysis be conducted.

Where a section of timber is rotten, the best option is to take out the rotten material and replace it with spliced-in timber inserts that are shaped to match the existing profiles. The inserted timber should also be treated using wood preservative and the junction between the masonry sub-cill and the timber cill should be sealed.

It is tempting to replace traditional windows with PVC u, particularly when the installer provides an installation that includes both replacement and removal within a single day. It is essential that installers of replacement windows are aware of the history and design of traditional timber frames. This will allow them to make the appropriate recommendations for energy efficiency improvements as well as other technological upgrades that won't affect the appearance 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 replacement windows are deemed acceptable by the Building Regulations as a suitable option. A skilled carpenter is able to install PVC-u windows that are suited to the original building's style. This is especially true when the windows are located in listed buildings and conservation areas.