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Replacement Double Glazed Units Over time, double glazed units (or sealed units as they are usually called) will break down. This is usually the case when the insulating properties of the inert gas between glass panes breaks down. It is essential to replace a damaged or broken window to ensure that your home is fully energy efficient and well-insulated. The task is simple and easy to accomplish at home. Installation If the window is properly installed, the new window will fit snugly and will fit comfortably within the frame. If the new glazed unit isn't of the same thickness as the previous one, you may have to adjust the existing “packers” (usually blue or red slips of plastic) in the frame to ensure it sits properly. If you're unsure of what to do, consult your installer or the instructions of the manufacturer for advice. A high-quality replacement double-glazed unit is constructed to exacting standards, and should fit in your frame with minimal fuss. A small error could have a major impact on the performance of your window. Modern double-glazed units are an excellent addition to any home. They are energy efficient and can save you money. They use an argon gas layer between the panes in order to insulate and thus reduce the amount of heat that can escape from your home during cold winter months. Sometimes, these units may develop issues with their seals. This happens when moisture gets into the air cavity and creates condensation. Moisture in the windows' cavity is not only unsightly but also reduces the effectiveness and efficiency of the glass unit. Condensation can be caused by a range of factors and the best method to determine the cause is to look for a hazy or hazy appearance between the window panes. This is an indication that the seal between the two panes has ruptured and moisture is pouring in to your living space. The first step to take is to take the glazing beads off around the edges of your window. This can be a little tricky and a bit messy, but it is worth the effort because it allows you to access the wedge gasket that keeps your glass in place. You'll need to take off the beads with care so that they do not break, and it's usually a good idea to seek assistance at this point. After the beads are removed, allow the sealed unit to fall slightly from the frame. With upvc window seal replacement , hold it in position while you precisely measure the width, height and also the thickness. This information is essential because it determines the size of the wedge gasket that you will need to cut for the double glazed unit. Checking Double glazing units or sealed units as they are often referred to and can fail in time. This is usually due leaks in the seal, which lets condensation and moisture into the space between the panes. This can affect the way the window is able to block out cold air, heat generated by the heating system inside the home, and solar gain inside. Failing seals can also result in draughts being felt within the home. It is essential to check your double-glazed windows for signs of failure. Moisture or misting in between the glass is a clear sign that the seal has failed and a replacement unit is required. If you must replace a sealed unit, it is essential that the replacement unit is of the right size to fit. The uPVC frames which the sealed unit is placed in have little tolerance for movement, so even a few millimetres too big can have an impact on the performance of the window. Get advice from a professional or follow the guide supplied by the manufacturer to ensure that you get the correct size. Place the new unit into the frame with the assistance of a partner. This should be done in a secure area as the glass may break if it falls out. After the sealed unit has been secured in the frame, reconnect any packers at the bottom of the frame and then reinstall the glazing beads into their original positions. After you have completed this, give the whole window a visual examination to make sure there aren't any gaps or misalignments that could compromise its performance. You may need to add some sealant around the edges of the frame to prevent it from moving. Reviewing the thickness of the unit is also a good thing to do. This is crucial since double-glazed units come in various thicknesses, and using the wrong thickness could affect the u-value of your home's insulation. Sealing Double glazing can improve the thermal efficiency of your home and provide better acoustics. Over time, the seals on the glass can be worn out, resulting in windows that are drooping or misty. In these cases replacement is required. It's a good idea employ a double glazing expert who can assist you in selecting the most suitable glass products, take accurate measurements and ensure proper installation. The first thing to be done when replacing a sealed unit is to clean the frame. You can make use of an old paint brush (4 inch is the best) to sweep the frame out, removing dust and cobwebs that have built up within the frame over time. After the frame has been cleaned, it's best to give the new seals a clean too. It is the easiest way to remove the wedge gaskets from the friction joint by placing your fingers on the edge of the gasket and pulling it out. Take note of the time frame you'll need to use your new seals. This will help when cutting them. The installation of the sealed unit is easy once the frame and gaskets have been cleaned. It's a great idea to remove the beads (the UPVC frames clips that are used to hold the glasses) and measure them. This will ensure that the seal is made to the right size, and that there aren't any gaps in it. When the beads are back in their place, you can insert the first bead and proceed to the other three. After sealing the units, you must not touch them for a few hours because the silicone sealant has to set and harden. I usually wait about 6 hours to handle it, but the silicone sealant's setting time can vary. Finishing Finishing the project and sealing it is now required after the new double-glazed unit is been securely installed within its frame. This isn't just an actual finalization of the project but also a declaration that your home is ready to weather the elements with its new secured guardian is in place. The first step is to clean the frame, by carefully removing any glazing beads or strips that secured the old glass. The frame is cleaned of dirt and sealants that have been used for years, as well as glazing tape, a process that also revitalizes the wood or aluminium of the window's frame. It's also a good opportunity to evaluate any damage and make small repairs, by using wood filler or sanding as necessary. Major damage should be referred to a professional to repair. Next, the tubes that are used as spacers are filled with desiccants to adsorb any moisture that may be trapped in-between the two glass panes during the process of manufacturing or after time. This is a typical procedure for units with warm edges. Thermoseal Group stocks desiccants as well as manual and automatic desiccant dispensing devices. After the spacers have been filled with the spacers, the glass and frame are sealed with a high-performance silicone designed to tolerate Australia's harsh climate. The sealant creates an airtight barrier that is both durable and flexible that can expand and contract without breaking. It is crucial to choose the correct thickness as any gaps can affect thermal performance. If you're not sure of the correct thickness to use you should consult a professional or manufacturer's guide. The final step is to apply a secondary sealant, which is typically polyisobutylene (PIB) or an equivalent product. It is applied to the outside edges of frames to create an additional seal. It is able to repel moisture and prevent air infiltration, improving the efficiency of the energy. The frame is then adorned with an aluminum cladding. This is a protective coating that is able to withstand the elements, keeping your frame looking brand new for many years to be. It's a wise investment in the long-term durability of your home's frame particularly in the case federation or period homes where timber frames are prone to rot and degradation.