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Replacement Double Glazed Units Double-glazed units, also known as sealed units as they're also called, will be damaged over time. This occurs when the insulating properties of gasses that insulate the glass panes are broken down. It is crucial to replace a damaged or broken window to ensure that your home is energy efficient and well-insulated. Fortunately the task is relatively simple and easy to complete at home. Installation If the window is properly installed, the new window will fit firmly in place and will fit comfortably within the frame. If the new glazed panel is not the same thickness that your old one was it may be necessary to adjust the 'packers' (usually red or bluish plastic slips) inside the frame. If you are unsure how to proceed, consult your installer or the instructions provided by the manufacturer for guidance. A good quality replacement double glazed sealed unit is made to the highest standards and should fit into your frame with the least amount of fuss. A small mistake can have a major impact on the performance of your window and must be inspected carefully. Modern double-glazed units are a fantastic energy efficient addition to any home. They apply argon between the panes of glass to keep them warm, and reduce the amount heat that escapes from your home during cold winter. Sometimes, these units may develop problems with their seals. This is usually the case when moisture gets into the air space of the glass and causes condensation between the panes. The presence of moisture in the windows' cavity is not only unsightly but also decreases the effectiveness and efficiency of the glazed unit. Condensation can be caused by a variety of causes. The best method to determine the cause is to look for a foggy or misty look between your windows. This indicates that the seal between two panes has been broken and water is flowing into your living space. The first step is to remove the glazing beads around the edges of your window. It's tricky and messy, but it's worth it as you will have access to the wedge gasket which holds the glass in place. It is important to remove the beads with care so that they don't fall off. repairmywindowsanddoors is advisable to ask for help. be beneficial at this point. Once the beads have been removed and the sealed unit is free of them, allow it to slide a bit out of the frame. With the help of a person, hold it in place while you take measurements of its width, height and thickness. This is crucial as it will determine the size of the wedge gasket must be cut to accommodate the new double glazed sealed unit. Checking Double glazing units, or sealed units as they are commonly called, may break down over time. This is usually due to a break in the seal, which allows moisture and condensation to enter the space between the panes. This affects the ability of the window to keep cold air out, warm air produced by the heating system in, and solar energy from the sun inside. A faulty seal can also result in draughts being felt within the home. It is essential to check your double-glazed windows for indications of failure. If you see water or mist forming between the glass, this is a sign that the seal is failing and a replacement unit must be installed. If you have to replace a sealed unit, it is crucial that the new unit is of the right size to fit. The uPVC frames in which the sealed unit is set in have little tolerance for movement, so even tiny millimetres of excess could affect the performance of the window. To be certain that you are ordering the correct size, it is best to consult an expert or the manufacturer's guide. With a helper holding the new piece, gently place it in the frame. This should be done in a secure place as the glass can break if it falls. After the sealed unit has been secured to the frame attach any packers that are on the bottom of the frame, and then replace the glazing beads back into their original position. Once you've completed this make sure you give the window a thorough visual inspection to ensure there aren't any gaps and that it is not misaligned. You may have to add some sealant around the edges of the frame to stop it from moving. Reviewing the thickness of the unit is also recommended. This is crucial since double glazed units are available in different thicknesses, and a wrong thickness can affect the u-value of your home's insulation. Sealing Double glazing can increase the efficiency of your home and improve acoustics. However, over time, the glass's seals may get worn out, leading to misty windows and a reduction in performance. In these situations it is necessary to replace the glass. It's a good idea work with a double glazing professional who can help you select the best glass products, make precise measurements and ensure proper installation. The first thing that needs to be done when replacing the sealed unit is to clean the frame. You can make use of an old paintbrush (4 inch is the best) to sweep the frame clean to remove dust and cobwebs which build up within the frame over time. After the frame has been cleaned, it's a good idea to give the new seals a clean too. The easiest method for doing this is to pull out the gaskets on the Wedge by placing your fingers on the edge, and then pulling it out at the point where it is in contact with the friction joint. Make a note of how long you need the new seals. This will aid in cutting them. Once the gaskets are cleaned and the frame is cleaned it's time for the sealed unit. It's a good idea remove the beads (the UPVC frames clips that hold the glasses) and then measure them. This will ensure that the seal is made to the correct size, and that there are no gaps around it. When the beads are back in their place, you can insert the top bead, and then move on to the remaining three. Be careful not to touch the sealed units for a while afterward as the silicone sealant will need some time to set and harden before you can use it again. I usually wait about 6 hours to handle it, but the sealant setting time will vary. Finalization Once the new double glazed unit is securely seated within its frame It's time to seal it and then finish. This is more than just a physical closure to the project; it's an affirmation that your home is now ready to withstand the elements with a new, secure guardian safely in the right place. The first step is to clean the frame, taking care to remove any glazing strips or beads that held the old glass. The frame is then clean of dust, old sealant, and glazing tape, a process that also revitalizes the wood or aluminium of the window's frame. This is also the time to make any minor repairs with wood filler and sanding, if needed. Major damage should be referred to a professional for repair. The spacer tubes will be filled with desiccants to absorb any moisture that might have accumulated between the two panes during production or over time. This is the standard procedure for warm edge sealed unit. Thermoseal Group stocks desiccants as well as manual and automated desiccant dispensing equipment. After the spacers are filled with glass, it is sealed with a high performance silicone designed to withstand Australia's harsh climate. The sealant creates an airtight barrier that is both durable and flexible that can expand and contract without breaking. It's crucial to select the correct thickness, as any gaps could affect thermal performance. If you're not sure of the proper thickness seek advice from an expert or the manufacturer's guidelines. The final step is to apply a secondary sealant, which is typically polyisobutylene (PIB) or an equivalent product. It's applied to outside edges of the frame and creates a secondary seal that's capable of repelling moisture and stop air penetration, helping to increase energy efficiency. The frame is then adorned with an aluminum cladding. This protective coating will withstand the weather and keep your frame looking new for many years. It's a wise investment in the long-term integrity of your home's frame, especially in the case of historic homes or federation homes, where timber frames are susceptible to decay and rot.