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Replacement Double Glazed Units Double glazed units, or sealed units as they're also called, may be damaged over time. This happens because the insulating qualities of the inert gases between the glass panes are broken down. It's important to replace a damaged 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 was fitted correctly, the new window should fit comfortably and firmly within the frame. If the new glazed panel isn't the same thickness as your old one, you may have to adjust the 'packers' (usually red or bluish plastic slips) in the frame. If you're not sure what to do, consult your installer or the instructions of the manufacturer for advice. replacement sealed units for double glazed windows -quality replacement double-glazed sealed unit is made to exacting standards, and should fit your frame with ease. A small mistake can have a major impact on the performance of your window, and should therefore be checked carefully. Modern double-glazed units are an excellent addition to any home. They are energy efficient and save you money. They use a layer argon between the panes glass to keep them warm and decrease the amount of heat that escapes your home in cold weather. Sometimes, these units develop problems with their seals. This happens when moisture enters the air cavity and creates condensation. The presence of moisture in your window is not only unsightly, but it also reduces the efficiency of the glazed unit. Look for a fogginess or misty look between the window panes. This is a sign that the seal between the two glass panes is broken and moisture is flowing into your living spaces. The first step is to remove the glazing beads from around the edges of your window. It can be tricky and a bit messy, but it's worth the effort as it lets you access the wedge gasket which holds your glass in place. It is necessary to remove the beads with care so that they don't break and it's often an excellent idea to seek assistance at this point. Once the beads are removed and the sealed unit is free of them, allow it to slide a bit out of the frame. With a helper to hold it in place while you accurately take measurements of its length, width and height. This information is vital as it will help you determine the size wedge gasket to cut for your new double-glazed sealed units. Checking Double glazing units or sealed units, as they are often referred to they can break down over time. This is usually because of a crack in the seal that allows moisture and condensation to infiltrate the space between the panes. This affects how the window is able to block out cold air, heat generated by the heating system within the home, and solar heat inside the window. A faulty seal can also cause draughts in the home. It is essential to check regularly your double glazed windows for indications of failure. If you notice moisture or mists between the glass, this is an indication that the seal is not working and a new unit should be installed. It is important that you replace the sealed unit with the correct size. The uPVC frames on which the sealed unit is positioned have a very small tolerance for movement, so even a few millimetres of movement can alter the performance of windows. To ensure 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 unit, gently slide it into place in the frame. It is vital to make this move in a secure spot since the glass is fragile and can be thrown out and break. After the sealed unit is secured within the frame, re-attach any packers that are at the bottom of the frame, and then put the glazing beads back into their original position. After you've completed this take the window for a thorough visual inspection to ensure that there aren't any gaps and that it is not misaligned. It is also possible to add a bead of sealant around the perimeter edge of the frame to prevent it from shifting in the future. Reviewing the thickness of the unit is a good thing to do. This is essential since double-glazed units are available in various thicknesses and a wrong thickness can affect the u-value of your home's insulation. Sealing Double glazing is a great method to increase your home's thermal efficiency as well as provide improved audio quality by cutting down on the transfer of sound. Over time, the seals on the glass may get worn out, leading to windows that are drooping or misty. In these cases replacement is required. It is recommended to consult an experienced double glazing contractor who can assist you in selecting the appropriate glass to ensure accurate measurements and ensure proper installations. If you are replacing a sealed unit the first thing you need to do is clean the frame. You can make use of an old paintbrush (4 inches is the ideal size) to sweep the frame out by removing dust and cobwebs which accumulate in the frame over time. When the frame is clean, it's best to give the seals that are new a thorough clean too. The easiest way to do this is to remove the Wedge gaskets by putting your fingers on the edge and pulling it out at the point that it overlaps with the friction joint. You should also take a note of the length that you require for your new seals as it will help when cutting them to size. The installation of the sealed unit is easy after the gaskets and frame have been cleaned. To get the best results from this it's a good idea to prise out the beads (the UPVC frame clips that are used to hold the glass) and then measure them. This will ensure that the seal is constructed to the correct size and there aren't any gaps in it. After the beads are in their place, you can insert the first bead and work your way round to the remaining three. After sealing the units, you should not contact them for several hours because the silicone sealant must harden and set. I typically leave it for about 6 hours before handling, but this can vary based on your silicone sealant's setting time. Finishing After the double-glazed unit is securely seated within its frame and is sealed, it's time to seal and complete. This step is not just an aesthetic finish to the project, but also a declaration that your home will be ready to weather the elements now that its new safe guardian is in place. The first step is to clean the frame, taking care to remove any glazing strips or beads that bonded the old glass. The frame is then scrubbed clean of dirt, old sealant and glazing tape. This process also rejuvenates the timber frame or aluminium frame. This is also the time to make any minor repairs by using wood filler or sanding, in the event that it is necessary. The most serious damage should be taken to an expert to repair. The spacer tubes will be filled with desiccants to absorb any moisture that may be trapped between the two panes during production or over time. This is a standard procedure for units with warm edges. Thermoseal Group stocks desiccants as well as manual and automatic desiccant dispensing devices. After the spacers are filled with glass, the frame and glass are sealed with a high-performance silicone, specifically designed to withstand Australia's tough climate. This sealant creates a tight barrier that's both robust and flexible, able to expand and contract without becoming brittle or breaking. It's important to use the correct thickness, since any gaps could affect the thermal performance. If you're unsure of the correct thickness to use seek advice from an expert or the manufacturer's guidelines. The final step is to add secondary sealant. This is usually polyisobutylene, or a similar substance. This is applied to the edges of the frame's exterior which creates a secondary seal able to repel moisture and prevent air penetration, helping to increase the efficiency of energy. The frame is then adorned with an aluminum cladding. It's a protective coating that can withstand the elements, keeping your frame looking like new for years to come. It's a smart investment in the long-term durability of your home's frame particularly in the case of period or federation homes where timber frames are susceptible to decay and rot.