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Replacement Double Glazed Units Double-glazed units, also known as sealed units as they're also called, will get worn out over time. This is usually the case when the insulating properties of the inert gas that is between the glass panes break down. When a window has broken down it's important to replace the unit to ensure your home is fully insulated and energy efficient. The process is fairly simple and straightforward. Installation If the window was put in correctly, the new window should be able to fit comfortably and securely inside the frame. If the new unit isn't of the same thickness as the previous one then you may need to adjust the existing 'packers' (usually blue or red slips of plastic) within the frame to ensure that it sits properly. If you're unsure of what to do, consult your installer or the manufacturer's instructions 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 hassle. A small mistake can have a major impact on the performance of your window and should therefore be checked with care. Modern double-glazed units are an excellent addition to any home. They are energy efficient and save you money. They are constructed with an argon gas layer between the panes to provide insulation and thus reduce the amount of heat that could escape from your home during cold winter months. However, in some cases, these units may fail or have issues with their seals. This occurs when moisture enters the air cavity and causes condensation. Moisture in your window cavity is not just unsightly, but it also reduces the efficiency of the glazed unit. Condensation can be caused by a variety of causes. The best method to test for it is to look for a foggy or misty 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 is to remove the glazing beads from around the edges of your window. It can be complicated and messy, but it's worth the effort as it lets you access the wedge gasket that holds your glass in place. It is crucial to take care when removing the beads so that they don't fall off. A little help from a friend can be a good idea at this stage. After the beads have been removed, allow the sealed unit to drop slightly from the frame and with help from a person, keep it in place while you accurately measure the height, width and the thickness. bifold door rubber seal replacement repairmywindowsanddoors is essential because it will determine the dimensions of the wedge gasket that you need to cut for the double glazed unit. Checking Double glazing units or sealed units as they are commonly called, may break down over time. This is usually due to an opening in the seal that allows moisture and condensation into the space between the panes. This affects the ability of the window to keep cold air out, warmth generated by the home's heating in, and solar energy from the sun's rays inside. The failure of seals can result in draughts being felt within the home. Double-glazed windows should be checked frequently for signs of failure. A misting or a haze of moisture in the glass is an sign that the seal has failed and a replacement unit should be put in place. If you must replace a sealed unit, it is crucial that the new one is the correct size to fit. The uPVC frames in which the sealed unit is installed have a very limited tolerance for movement, so even a few millimetres can alter the performance of windows. Consult a professional or the guide provided by the manufacturer to ensure that you get the correct size. With the help of a person who holds the new unit gently slide it into place in the frame. This should be done in a secure location as the glass could break if it falls. Once the sealed unit is securely in the frame re-attach any packers at the bottom of the frame, and then put the glass beads back in their original positions. After you've completed this, give the window an inspection thoroughly to ensure that there are no gaps, and that it isn't misaligned. It is possible to apply a small amount of sealant around the perimeter of the frame to stop it from moving. It is recommended to check the thickness of the glass unit. This is essential since double-glazed units come in different thicknesses, and if you choose the wrong one, it can affect the u-value of your home's insulation. Sealing Double glazing is a great option to boost your home's thermal efficiency as well as improve sound quality by reducing the transfer of sound. However, over time, the seals in the glass can get worn out, leading to misty windows and a decrease in performance. In these cases replacement is required. It's a good idea to work with a double glazing professional who can assist you in selecting the most suitable glass products, make precise 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 use an old paint brush (4 inches is the ideal size) to sweep the frame out to remove dust and cobwebs that will have built up within the frame over time. It's a good idea to clean the seals that have been installed after the frame has been cleaned. The easiest method for doing this is to pull out the Wedge gaskets by putting your fingers on the edge, and then pulling it out at the point that it overlaps with the friction joint. It is also important to make an outline of the length you require for your new seals as it will help in cutting them to the required size. Installation of the sealed unit is straightforward once the frame and gaskets have been cleaned. To ensure the best results from this, it's recommended to remove the beads (the UPVC frame clips that support the glass) and then measure these. This will ensure the seal is built to the correct dimensions, and that there aren't any gaps in it. When the beads are back in place you can insert the top bead and then work your way round to the remaining three. You should be careful not to touch the sealed units for a few minutes afterward, as the silicone sealant will need some time to set and become hard before you are able to handle it again. I typically wait 6 hours to handle it, however the silicone sealant's setting time can vary. Finishing The sealing and finalization of the project is now necessary once the double-glazed unit has been installed securely within its frame. This isn't just an aesthetic finishing touch to the project but also a declaration that your home is well-equipped to stand the test of time after the new safe guardian is in place. The first step involves cleaning the frame and taking out any glazing beads strips or other materials that were used to fix the old glass. The frame is free of dust and old sealant as well as glazing tape, a process which also renews the timber or aluminium of the frame of the window. This is also the time to make any small repairs by using wood filler or sanding, if needed. For major damage it is recommended to seek out a professional. The spacer tubes will be filled with desiccants to absorb any moisture that may have been trapped between the two panes during production or over time. This is a common practice for a warm edge sealed unit. Thermoseal Group stocks desiccants as well as manual and automated desiccant dispensing machines. After the spacers are filled with glass, the frame and glass are sealed with a high-performance silicone, designed to tolerate Australia's harsh climate. This sealant creates a tight barrier that's both durable and flexible capable of expanding and expand without becoming brittle or breaking. It is important to use the right thickness, as any gaps could impact the thermal performance. If you're not sure about the right thickness to use, consult with an expert or a manufacturer's guide. The final step is to apply a an additional sealant, usually polyisobutylene (PIB) or a similar product. It's applied to outside edges of the frame and creates a secondary seal able to repel moisture and prevent air penetration and improve energy efficiency. Then, the frame is coated with aluminum cladding. It's a protective coating that is able to withstand the elements, and keep your frame looking brand new for years to be. It's a wise investment in the long-term integrity of your home's frame especially in the case of period or federation homes where timber frames are susceptible to decay and rot.