10 Cambridge Window-Related Projects To Extend Your Creativity Maintaining Timber Windows

A well-maintained timber window is an important part of the historic fabric of a building. It demonstrates in various degrees the various materials and techniques as well as the craftsmanship and architectural style of the time period from which it originates.

If it is possible, repairs must be made on-site. Proprietary resin-based repair systems can be used to fix the most deteriorated areas without removing the entire window.

Durability

The windows made of timber in many old buildings were made to last for centuries. But, they have to be maintained to ensure that they look good and operating correctly. Maintenance tasks include sash cord repairs, retightening of sash pulleys and painting. The demand for upgrading windows made of timber to improve energy efficiency is also growing. This may include replacing old glazing units, fixing existing window rebates or installing new cills to improve air seal.

The deterioration of paintwork is a major problem with traditional windows. This is particularly important in the case of sash windows as the gaps between sashes can be very large. In these situations, water can penetrate the paint film and cause rotting of the putty and underlying wood. Weather conditions that are not ideal can accelerate the rotting. To prevent this windows, they should be painted regularly with an exterior wood paint that is suitable.

Corroded areas should also be repaired using a resin-based product. This will ensure that the maximum possible amount of the original fabric is preserved. It is also important to limit the number of holes you drill into the frame for cable entry as these can admit water and lead to decay.


Another significant problem with older windows is structural movement in the wall, which can cause deformation of the frame and sash. This can lead to the sash fitting incorrectly and jamming or sticking into the opening, and broken glass. This can be corrected often by fitting new frames for sash made of slow-growing deal (pine), or oak. The cill must be constructed of a durable hardwood like oak to avoid differential movement between the new and existing work.

There are now several companies that make Boston pattern wooden sash that fit in with the majority of openings. They are available in a variety of sizes and finishes to meet the needs of the modern homeowner. Combined with quadruple draught strips and better thermal insulation these new sash options can make a substantial difference to the energy efficiency of a house.

Aesthetics

Many old wooden windows have an excellent aesthetic value because they typically show, in a particular way the materials and techniques and architectural taste of the period from when they were built. They could have significant historical value on their own. This is especially true of early windows that were not glazed in timber-framed buildings, in which the majority of them were series of openings within frames of structural construction, which were divided horizontally by mullions, and vertically by iron or wood bars to protect against intruders.

It is essential to preserve the appearance of traditional timber window joinery. It is vital that any decay caused by water penetration is stopped as soon as it is discovered. It is recommended to do this with thorough painting, especially if there has been damage or degradation. It is best to use paints designed to be used in a system (primer undercoat and finish) and to adhere to the manufacturer's recommendations for preparation and number coats at each stage.

Wet rot is a typical problem in older timber windows. The best way to stop it developing is to remove sections that are damaged or rotten as soon as possible to prevent the spread of the fungus that causes it. Replace rotting wood with slow-growing deal (pine), and when possible, the exact kind of timber as the one being removed, to prevent any differential movement.

Glass became less expensive and more abundant in the late medieval era and into the 17th century. In the process, glazed openings on timber-framed houses became more complicated with moulded mullions, wooden tracery and deep projecting cills. The glazing was increasingly laid within rebated frames and secured with 'glazing sprigs' rather than being inserted into lead cames. This method of glazing is not just less susceptible to leaks, but it can allow for more expansive, clearer sheets of glass to be used in the windows than would be possible without the need for lead lights.

Energy efficiency

The traditional timber windows are energy efficient because of their thickness, multilayer construction and focus on the smallest of details. upvc window repairs near me repairmywindowsanddoors.co.uk have large glass areas and deep projection cills which reduce air infiltration. With secondary glazing and draughtproofing, the windows can be improved to improve their energy efficiency. However it is essential to remember that such measures must be considered in relation to the overall integrity and appearance of the window in its original form.

It is logical to fix or upgrade windows, rather than replacing them, especially when the improvement in thermal efficiency can be made through simple fixes. Historic windows often have an historic value that demonstrates a range of technical development and changes in architectural tastes. The pressures to replace such windows are generally based on the assumption that the windows of the past will require replacement in the near future, however they are capable of serving for 150, 200 and even 250 years if they are properly maintained.

It is essential to realize that decay problems with traditional timber windows are easily prevented with timely and thorough repairs. It is also crucial to identify damp problems and fix them quickly so that you can avoid serious damage. Paint deterioration that occurs early is a concern because it allows moisture to get into the wood, leading to wet rot. This damage is often not apparent until the paintwork becomes cracking or wavy but it can cause severe structural damage and can lead to further decay.

A paint of good quality will prevent moisture penetration. It is also essential to keep the paintwork spotless to avoid condensation and mould growth. Modern synthetic paints are problematic since they are usually water-resistant, and can cause mildew to develop in the window frame.

The majority of older windows were constructed from sapwood-rich timber. The timbers will deteriorate rapidly if exposed to rain, however they can be protected by an extensive preservation treatment prior to use. It is important to choose the right type of wood for the location and climate, as these factors can affect the longevity of the joinery. Local window manufacturers make a variety of timber sash that can be adapted to fit specific historic openings. They can be constructed to the standard Boston pattern dimensions or to specific dimensions that are compatible with historic buildings.

Maintenance

The lifespan of windows made of timber can be extended significantly through regular inspections, careful redecoration and prompt repair. The most common reason for the decay is the infiltration of moisture through deteriorated paint and putty. This can be avoided by using a good wood preservative and painting the wood thoroughly.

It is important that repairs to old sash or casement windows are done correctly, and carried out with minimal disruption. Many traditional timber window designs are repairable without removing the frame, and this method should be used whenever it is possible. Remove loose or peeling paint and lightly sand the surface to improve the 'key" of the surface. This will enable the new coating to stick better. It is important to avoid stripping old paint layers that could have historical value and if they are present, it is recommended that a study of the paint be carried out.

If a piece of wood has rotted, the best solution is to take it off and replace it with timber inserts designed to match the existing profiles. The wood that is being inserted should be treated with wood preservative and the connection between the timber cill and sub-cill of the masonry should be sealed.

It can be tempting to replace traditional windows with PVC U, particularly when the installer offers an 'all-in-one' installation which includes removal and replacement within a single day. It is, however, essential that the person installing replacement windows has a full understanding of the construction and history of traditional timber frames. This will allow them to make appropriate suggestions for energy efficiency improvements and other technical upgrades that do not alter the character of a historic building. Those providing replacement windows should be registered with a Competent Persons Scheme like FENSA. This will ensure the replacements are deemed to be approved in accordance with Building Regulations as a suitable alternative. It is certainly possible for a skilled and experienced carpenter to install PVC-u windows that fit the style of the building originally. This is particularly true where windows are installed in listed buildings or conservation areas.