Notes

What Is Cambridge Window And Why Are We Speakin' About It?
Maintaining Timber Windows

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

Whenever possible repairs to windows that are already in use should be made in-situ. Repairing the most severe areas of decay can be done with the help of specialized resin-based systems.

Durability

Timber windows were designed to last hundreds of years. They do require maintenance to ensure they look good. Maintenance tasks include sash cord repairs and retightening pulleys on sash, and painting. The demand for upgrading windows made of timber to increase efficiency in energy use is also growing. This can include replacing old glazing units, fixing existing window rebates, or installing new cills to increase the air seal.


One of the main issues with traditional windows is damage caused by corrosion of the paintwork. This is particularly important when windows made of sash are involved because the gaps between the sashes can be very wide. In these circumstances water may get through the paint film and cause decay of the putty and the wood beneath. Weather conditions that are not ideal can accelerate the decay. To prevent this from happening, windows should be painted regularly with an exterior wood paint.

The areas that are damaged should be repaired with resin-based products. This will ensure the maximum amount of the original fabric is preserved. It is also essential to reduce the number of holes that are drilled into the frame to allow cable entry as these can allow water in and cause decay.

Another issue with older windows is the structural movement within the wall which could cause deformation of the frame and sash. This can lead to the sash not fitting properly and jamming or sticking to the opening and cracked glazing. Often this can be 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, in order to prevent any differential movement between new and existing work.

To reduce the risk to reduce the risk of this happening, there are a number of companies who produce Boston pattern sash made of wood that will fit into the majority of existing 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 home.

Aesthetics

Many old timber windows have a high aesthetic value since they usually show, in a particular way the materials and technologies and architectural taste of the time in when they were built. They could have significant historical value on their own. This is particularly true of windows that were unglazed in the early days of timber framed buildings which were simply a series of openings in the frame, which were divided horizontally into mullions and vertical wood or iron bars to keep out invaders.

It is important to maintain the appearance of traditional timber window joinery. It is essential that any decay resulting from moisture penetration should be stopped as soon as it is discovered. This can be done by applying a thorough coat of paint, particularly in areas in which there is already damage or deterioration. 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 frequent problem in old timber windows and the best way to stop it becoming a problem is to take out sections that are damaged or rotten as soon as possible to stop the spread of the fungus responsible for it. Replace the wood that is rotting with slow-growing deal (pine), and if possible, the same type of wood as the one that is being removed to prevent any differential movement.

Glass became more affordable and abundant during the late medieval period and into the 17th century. In upvc sash windows cambridge , the openings for glazed windows on timber-framed houses were more elaborate, with moulded mullions and traceries, made of wood and deep cills projecting into the air. In the past, more often, the glass was set within rebated frames and pinned in with 'glazing sprigs' rather than being inserted into lead cames. This method of glazing is not just less susceptible to leaks, but also allows for more expansive and clearer sheets of glass to be used in windows than would otherwise be possible without the need for lead lights.

Energy efficiency

Traditional timber windows are energy efficient because of their thickness and multilayer construction as well as care for particulars. They also feature large glass areas as well as deep projecting cills that reduce air infiltration. The windows can be made to improve their energy efficiency by draught-proofing and secondary glazing. It is essential to keep in mind that these measures need to be taken into consideration when it comes to the overall appearance and integrity of the original windows.

It is sensible to repair or upgrade existing historic windows rather than replace them, particularly when improvements in thermal efficiency can be achieved through simple fixes. The windows that are historic have a lot considered to be of historical value because they reflect a variety of technical development and changes to architectural taste. The pressures to replace such windows are usually based on the assumption that the windows of the past will require replacement in the near future, but the majority of them are capable of providing service for 150, 200 and even 250 years if they are properly maintained.

It is crucial to recognize that the decay issues that are associated with traditional timber windows can be prevented through regular maintenance and prompt repairs. In addition it is vital to recognize damp penetration issues and address them swiftly to avoid major damage. Early deterioration of paint is a particular problem, because it allows moisture to penetrate the wood and cause wet rot. It is not uncommon for this issue to go unnoticed until the paintwork begins to crack or become wavier. However, it could cause structural damage and then further decay.

A good paint will prevent moisture penetration. To prevent condensation and mould it is crucial to keep the paintwork as clean as it can be. Modern synthetic paints can pose a problem, as they are often designed to be water-resistant and this may result in the formation of mildew in the window frame.

Most older windows were made of sapwood-rich timber. These timbers can deteriorate very quickly when exposed to wet weather conditions, but they can be protected by a thorough treatment of preservative before they are used. It is crucial to select the right kind of wood for the site and climate, as these variables can affect the durability of the joinery. Local window manufacturers produce various types of timber sash that can be tailored to fit specific openings in historic buildings. They are available in the standard Boston pattern or in custom sizes to suit the architectural style of historic structures.

Maintenance

Regular inspections carefully redecorated, as well as prompt repairs can extend the life of timber windows. The most common reason for decay is the infiltration of moisture through the deterioration of paint and putty. This can be prevented by careful painting and using an excellent wood preservative.

Repairs to old sash windows as well as 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. Loose or peeling paint must be removed with care and sanded lightly to increase the key of the surface and allow for an easier adhesion of the new coating. Be careful to avoid stripping old paint layers which may have historic value, and where these are present, it is recommended that a study of the paint be conducted.

If a portion of wood is decayed, the best solution is to remove it and replace it with timber inserts designed to match the existing profiles. The inserted wood should also be treated with a wood preserver and the connection between the timber cill and the sub-cill for masonry should be sealed.

Replacement of windows made of traditional PVC-u can be a tempting option, especially when the installer provides a 'one stop shop' installation service that can handle both removal and replacement within one day. However, it is vital that the installer of windows replacement has a thorough understanding of the construction and history of traditional wooden frames. This will enable them to make appropriate recommendations for energy-efficiency improvements and other technological upgrades that won't alter the appearance of a historic building. Those who provide replacement windows should be registered under a Competent Persons Scheme like as FENSA. This will ensure the replacements are deemed acceptable under Building Regulations as a suitable alternative. A skilled carpenter can install PVC-u Windows that are sympathetic to the original character of the building. This is especially true where windows are situated in listed buildings or conservation areas.

Homepage: https://www.repairmywindowsanddoors.co.uk/cambridge-windowrepair/