The Reason Why Cambridge Window Is More Dangerous Than You Realized
Maintaining Timber Windows
A well-maintained timber window is an important element of the historic fabric of a structure. It demonstrates in various degrees the different materials and technologies as well as the craftsmanship and architectural style of the period that it was built in.
Whenever possible repairs to windows that are already in use should be done in situ. Repair systems made of resin can be used to repair the most deteriorated areas without removing the entire window.
Durability
The windows made of timber in many historic structures were designed to last for hundreds of years. However, they need to be maintained to keep them looking good and functioning correctly. you could try these out include repairs to sash cords and retightening pulleys for sash and painting. The demand for enhancing timber windows in order to increase energy efficiency is also growing. This can involve replacing old glazing units, fixing existing window rebates, or installing new cills for better air sealing.
The deterioration of paintwork is a major problem with traditional windows. This is especially important when it comes to sash windows as the gaps between sashes can often be very large. In these circumstances water can get into the paint film and cause rotting of the putty and the wood beneath. Poor weather conditions can exacerbate the rotting. To prevent this windows, they 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 the maximum amount of original fabric is preserved. It is also important to minimise the number of holes drilled into the frame for cable entry as these can let in water and cause decay.
Another issue with older windows is structural movement in the wall that can lead to deformation of the frame and the sash. This could result in the sash not fitting properly or sticking or jamming into the opening, and damaged 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 made of a durable hardwood like oak to avoid any movement between the existing and new work.
To reduce the risk to reduce the risk of this happening, there are a number of companies who manufacture Boston pattern wooden sash that will fit most existing openings. The sash is available in a range 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 huge difference to the efficiency of a home's energy use.
Aesthetics
Many old timber frames possess a dazzling aesthetic appeal because they show, in some shape, the materials, technology, and architectural aesthetics of the time they were built. They may have significant historical value in their own right. This is especially true of windows that were unglazed in the early days of timber-framed structures, where the great majority were simply a series of openings in the frame, which were divided horizontally into mullions and wood or iron bars to deter invaders.
It is essential to preserve the appearance of traditional wooden window joinery. When you spot any signs of decay caused by moisture penetration it is crucial to stop it. It is recommended to do this with thorough painting, especially where there has been damage or degradation. It is best to choose paints that are intended to be used in a set (primer undercoat and finish) and to follow the manufacturer's guidelines for preparation and number of coats at each stage.
The fungus that causes wet rot can quickly spread in old windows made of timber. To prevent this from happening, take out any rotten or damaged parts as soon as you can. Replace rotting wood with slow-growing deal (pine), and should it be possible, the same kind of timber as the one that is being removed, to prevent any differential movement.
In the late medieval and 17th century periods glass became less expensive 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 projection cills. In the past, more often, the glass was laid within rebated frames and pinned in with 'glazing sprigs' rather than being inserted into lead cames. This method of glazing is not only less susceptible to leaks, but it also allows more expansive clearer, more transparent sheets of glass to be used in the windows than would have been possible without the need for lead lights.
Energy efficiency
The traditional timber windows are energy efficient due to their thickness and multilayer construction, as well as their attention to the smallest of details. They also have large glass areas as well as deep projection cills which reduce air infiltration. The windows can be modified to improve their energy efficiency with draught-proofing and secondary glazing. However, it is important to keep in mind that any such measures must be considered in the context of the overall integrity 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 made inexpensively with simple repairs and upgrades. The windows of the past often have historical significance that illustrates a variety of technological advancement and changes in architectural style. Most people think that the windows will need to be replaced in the near future. However, they will last for 150, 200, or even 250 years with proper maintenance.
It is important to recognise that the decay issues that are that are typical of windows made of timber can be avoided by thorough maintenance and swift repairs. In addition it is vital to spot damp penetration issues and fix them promptly to prevent serious damage. The early deterioration of paint is a particular problem, because it allows moisture to penetrate the wood and cause wet rot. The damage is usually not apparent until the paintwork is cracking or wavy but it can cause severe structural damage and can lead to further decay.
A good quality paint will prevent this moisture penetration. To prevent condensation and mould, it is important to keep the paintwork as clean as you can. The use of modern synthetic paints could be a problem because they are usually designed to be water-resistant and this may cause the growth of mildew in the window frame.
The majority of older windows were manufactured from timber containing a high proportion of sapwood. These timbers deteriorate quickly if exposed to rain, however they can be protected with an extensive preservation treatment prior to use. It is also crucial to ensure that the type of wood used is suitable to the location and climate conditions, since these factors will influence the durability of the joinery. Local window manufacturers offer various types of timber sash which can be made to fit the historic openings. They can be built according to the standard Boston pattern dimensions or to custom dimensions that are compatible with the architectural style of historic buildings.
Maintenance
The life span of windows made from timber can be extended significantly by regular inspection as well as a careful redecoration and timely repair. The primary reason for the decay is moisture infiltration through the deterioration of paint and putty. This can be avoided with careful painting and using an excellent wood preservative.
It is crucial that repairs to old sash or casement windows are done correctly, and carried out with minimal disruption. Many traditional timber window designs can be repaired without dismantling the frame, and this option should be taken whenever possible. Remove any peeling or loose paint and lightly sand the surface to improve the "key" of the surface. This will allow the new coating to adhere better. Be careful to avoid stripping old paint layers that could have historical value and if they are present it is recommended that a paint analysis be carried out.
If a portion of wood has rotted the best option is to remove it and replace it with timber inserts that are shaped to match the existing profiles. The inserted wood should also be treated with a wood preserver, and the junction between the timber cill and sub-cill for masonry should be sealed.
It's tempting to replace traditional windows with PVC U, particularly when the installer offers an installation that includes both replacement and removal in one day. It is essential that installers of replacement windows have a deep understanding of the history and design of traditional timber frames. This will enable them to make the appropriate suggestions for energy efficiency improvements and other technological upgrades that do not alter the historic character of a building. Those who provide replacement windows should be registered under a Competent Persons Scheme like as FENSA. This will ensure that the replacements are approved as a suitable solution in accordance with Building Regulations. It is, of course, possible for an experienced and skilled carpenter to install PVC-u windows that are sympathetic to the the building originally. This is particularly true where windows are installed in listed buildings and conservation areas.