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Replacement Double Glazed Units Over time, double glazed units (or sealed units as they are commonly called) will break down. This usually happens due to the insulating properties of the inert gas between the glass panes breaks down. When a window has broken down it's important to replace the unit to ensure that your home is fully insulated and energy efficient. The task is easy and straightforward to do at home. Installation If the window has been installed correctly, the new unit will fit snugly and sit comfortably inside the frame. If the new unit isn't the same thickness as the old one then you may need to adjust the existing 'packers' (usually blue or red slips of plastic) inside the frame to ensure it sits properly. If you're not sure how to do this then consult your installer or the manufacturer's instructions for guidance. A good quality replacement double glazed sealed unit will be made to exacting standards and should fit into your frame with a minimum of hassle. A tiny mistake can have a huge impact on the performance of your window. Modern double-glazed units are a fantastic addition to any home. They are energy efficient and can save you money. They use a layer of argon gas between the panes to insulate and reduce the amount of heat that can escape your home in cold weather. Sometimes, these units can develop issues with their seals. This occurs when moisture enters the air cavity and causes condensation. The moisture that is absorbed by the cavity of your windows is not just ugly, but also affects the efficiency and effectiveness of the glass unit. You can spot a cloudy or a misty appearance between the window panes. This indicates that the seal between two panes is been broken and water is flowing in to your living space. The first thing you need to do is remove the glazing beads around the edges of the window. This can be a little complicated and messy but is well worth the effort since it allows you to access the wedge gasket which holds your glass in place. You'll need to take off the beads with care to ensure that they don't break, and it's usually an excellent idea to seek assistance at this point. Once the beads are removed then allow the sealed unit a little to fall out of the frame. With the help of a person holding it in place while you accurately measure its length, width and height. This information is essential because it will 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, can fail in time. This is usually due leaks in the seal, which lets condensation and moisture into the space between the panes. This affects the ability of the window to keep cold air out, and warm generated by the home's heating in and solar gain from the sun inside. A faulty seal can also cause draughts to be felt within the home. It is crucial to check your double glazed windows for signs of failure. If you see moisture or mist forming between the glass, it is a sign that the seal is failing and a new unit should be installed. If you must replace a sealed unit it is vital that the replacement unit is the correct size to fit. The uPVC frames which the sealed unit is placed in have a very limited tolerance for moving, so even tiny millimetres of excess could affect the performance of the window. To be certain that you're getting the right size it is best to consult an expert or the manufacturer's manual. With the help of a person who holds the new unit gently slide it into place in the frame. This must be done in a secure area as the glass may break if it falls. After the sealed unit is secured in the frame re-attach any packers on the bottom of the frame and then place the glazing beads back in their original position. After you have completed this, give the entire window a visual examination to ensure that there are no gaps or areas of misalignment that could affect its performance. It is also possible to apply a small amount of sealant to the outer edge of the frame to stop it from moving in the future. Reviewing the thickness of the unit is a good thing to do. This is essential since double-glazed units come in various thicknesses, and if you choose the wrong one, it could 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 enhance acoustics by cutting down on the transfer of sound. Over time the seals on the glass may get worn out, leading to misted or drooping windows. In these instances, replacement is necessary. It's a good idea consult a double-glazing expert who can help you select the best glass products, take accurate measurements, and ensure proper installation. The first thing that needs to be done when replacing an item that is sealed is to clean the frame. You can make use of an old paintbrush (4 inches is the ideal size) to sweep the frame out to remove dust and cobwebs which have built up in the frame over time. Once the frame is clean it's best to give the new seals a clean too. It is the easiest way to remove the gaskets that are wedge-shaped from the friction joint by placing your fingers along the edge of the gasket and pulling it away. Note down the time frame you'll need to use the new seals. This will aid in cutting them. Installing the sealed unit is simple after the gaskets and frame have been cleaned. It's a great idea to remove the beads (the UPVC frames clips that hold the glasses) and measure them. This will ensure that the seal is made to the correct dimensions and ensure there aren't any gaps around it. After the beads are put back in, you can begin with the top one and move down to the others. After sealing the units, do not contact them for several hours as the silicone sealant has to harden and set. I usually wait about 6 hours before handling it, but the sealant setting time will vary. Finishing double glazing window seal replacement sealing and finalization of the project is now required once the new double-glazed unit has been snugly installed within its frame. This step is not just an aesthetic finishing touch to the project it also signifies that your home is ready to weather the elements with its new safe guardian is installed. The first step is cleaning the frame and removing any glazing beads, strips or other materials used to secure the old glass. The frame is then cleaned of any dirt, old sealant, and glazing tape. This process also rejuvenates either the aluminium or timber frame. It is also a good time to evaluate any damage and make small repairs, by using wood filler or sanding if needed. For major damage, you should seek out an expert. The tubes for the spacer are filled with desiccants in order to absorb any moisture trapped in-between the two panes of glass in the course of manufacture or later on. This is the standard procedure for a warm edge seal. Thermoseal Group stocks a range of desiccants and manual or automated dispensers for desiccant. After the spacers have been filled, the glass and frame are sealed using a high-performance silicon, specifically designed to withstand Australia's harsh climate. This sealant forms an airtight barrier that is extremely flexible and durable, and can expand and contract without breaking. It is crucial to choose the right thickness since any gaps can affect thermal performance. If you're not sure of the proper thickness you should consult a professional or manufacturer's guide. The final step is adding secondary sealant. This is usually polyisobutylene, or a similar substance. It is applied to the edges of frames to create an additional seal. It can repel moisture and prevent air infiltration, thereby increasing the efficiency of the energy. The frame is coated with aluminum cladding. This protective coating will withstand the weather and keep your frame looking new for many years. It's a smart investment for the long-term durability of your home's frame particularly in the case of period or federation homes where timber frames are prone to decay and rot.