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10 Cambridge Window Tricks All Experts Recommend
Maintaining Timber Windows

A well-maintained and maintained timber window is a significant element of the historic fabric of a structure. It reflects in different degrees, the technology and materials of the time period it was constructed, as well as the craftsmanship and architectural taste.

If repairs are possible to windows that are already in use should be carried out in situ. Repair systems made of resin can be used to fix the most damaged areas of decay without having to remove the entire window.

Durability

Timber windows were built to last for hundreds of years. They require regular maintenance to keep them looking good. The most frequent maintenance tasks include repairs to sash cords and re-tightening the sash pulleys and painting. The demand for enhancing windows made of timber to increase energy efficiency is also growing. This can include replacing old glazing units, fixing existing window rebates or installing new cills to increase the air seal.

The corrosion of paintwork is a major problem with traditional windows. This is especially true when sash windows are concerned because the gaps between sashes can be very large. In these instances, water can penetrate the paint film and cause rotting of the putty as well as underlying wood. The weather can be a factor in accelerating the rotting. To prevent this windows from becoming rotten, they must be painted regularly using an exterior wood paint that is suitable.

Areas that have been damaged must be repaired with resin-based products. This will ensure that the maximum possible amount of the original fabric remains. It is also important to reduce the number of holes that are drilled into the frame for cable entry, as they could let in water and cause decay.

Another major issue with older windows is the structural movement within the wall, which 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 broken glazing. Most often, this is corrected by the fitting of new sash boxes that have been constructed from slow-growing deal (pine) or oak. The cill should be constructed of a durable hardwood like oak to avoid any movement between the old and new work.

To reduce the risk There are a variety of companies that make Boston pattern sash made of wood that can be fitted into most openings. These sash are available in a variety of sizes and finishes to suit the needs of today's homeowner. These sash are combined with quadruple draft strips and a better thermal insulation, can make a significant difference to the efficiency of your home's energy usage.

Aesthetics

Many old wooden windows have an excellent aesthetic value because they typically demonstrate, in a way the materials and techniques and architectural taste of the period from which they date. They could have significant historical value as a set. This is especially true for early unglazed window openings in timber framed buildings which were merely a series of openings in the structural frame sub-divided horizontally into mullions, and vertically into wood or iron bars to keep out intrusions.

Traditional window joinery made of timber is a beautiful aspect of a building, and is crucial to keep it looking good. It is essential that any decay caused by moisture penetration should be stopped as soon as it is discovered. It is recommended to do this by thorough painting, particularly if there is damage or deterioration. It is recommended to use paints that are designed to be used as part of a system (primer as well as undercoat, finish and primer) and follow the manufacturer's instructions regarding preparation and number of coats needed at each stage.

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

In the late medieval and 17th century periods glass became cheaper and more abundant, and the openings for glazed glass in timber-framed buildings gradually became more sophisticated, with tracery made of wood as well as moulded mullions and projecting cills. In recent times, glass was fixed into frames that were rebated with glazing sprigs rather than 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 utilized than would have been feasible without the use of leaded lights.


Energy efficiency

The traditional timber windows are energy efficient due to their thickness and multilayer construction as well as care for the smallest of details. They also feature large glass areas as well as deep projection cills which reduce air infiltration. With secondary glazing and draughtproofing, windows can be upgraded to improve their energy efficiency. It is crucial to remember that these measures should be taken into consideration in relation to the overall integrity and appearance of the original windows.

It makes sense to repair or upgrade existing windows, rather than replacing them, especially when the improvement in thermal efficiency can be achieved through simple repairs. The windows of the past often have an historic value that demonstrates a range of technical development and changes in architectural taste. The pressure to replace these windows are generally based on the assumption that windows that are old will need to be replaced in the near future, however they are capable of serving for 150, 200 and even 250 years if they are properly maintained.

It is important to recognise that the decay problems associated with traditional windows made of timber can be avoided through regular maintenance and timely repairs. Additionally it is vital to recognize damp penetration issues and to remedy them quickly to prevent serious damage. Paint deterioration that occurs early can be a problem because it allows moisture to get into the wood, causing wet rot. It is not uncommon for this damage to go undetected until the paintwork begins to crack or become wavier. However, it could cause structural damage and then further decay.

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

Most older windows were made of sapwood-rich timber. These timbers can deteriorate very quickly when exposed to moist weather, but can be protected by a thorough treatment of preservative before they are put to use. upvc door repair cost is also essential to ensure that the type of wood used is suitable to the site and climate conditions, as these factors can affect the longevity of the joinery. Local window manufacturers offer an array of sash made from timber that can be adapted to fit historical openings. They are available in the standard Boston pattern or in custom sizes to fit historical buildings.

Maintenance

The lifespan of windows made of timber can be extended by regular inspection, careful redecoration and timely repair. The primary cause of wood decay is the penetration of moisture through deteriorated paint or putty. This can be prevented by careful painting and the use of a good quality wood preservative.

Repairs to sash windows that are old and casement window frames should be handled with care and minimal disruption. Many traditional timber window designs are repairable without removing the frame, and this method should be taken whenever possible. Remove any peeling or loose paint and lightly sand the area to improve the 'key" of the surface. This will allow the new coating to adhere better. It is crucial to avoid removing old paint layers, as they may have historical significance.

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

Replacement of traditional windows with PVC-u is an appealing option, particularly when the installer provides a 'one stop shop' installation service that can handle removal and replacement in one day. It is essential that installers of replacement windows are aware of the history and construction of traditional timber frames. This will enable them to make the right recommendations for energy efficiency improvements and other technological upgrades that do not alter the historic character of a building. The window installers who provide replacement windows must be registered with a Competent Persons Scheme such as FENSA. This will ensure that the replacements are approved under Building Regulations as a suitable alternative. A skilled carpenter can install PVC-u windows that conform to original building's character. This is particularly true where windows are situated in listed buildings or conservation areas.