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Replacement Double Glazed Units Over time, double glazed units (or sealed units as they are usually known) will break down. This is usually the case because the insulating properties in the inert gas between the glass panes breaks down. If a window has been damaged down it's important to replace it to ensure your home is properly insulated and energy efficient. Luckily, the task is easy and straightforward to do at home. Installation If the window was fitted correctly, the new unit will fit snugly and securely within the frame. If the new window is not the same size as the old one you may need to adjust the 'packers (usually red or bluish plastic slips) within the frame. Consult your installer or the instructions from the manufacturer if you're not sure. A good replacement double glazed sealed unit is made to the highest standards and will fit into your frame with the least amount of fuss. However, a small error could have a huge impact on the performance of your window, and should therefore be checked carefully. Modern double-glazed units are a fantastic energy efficient addition to any home. They use a layer of argon in between the panes glass to keep them warm, and reduce the amount heat that escapes from your home in cold weather. Sometimes, these units may have issues with their seals. This usually occurs when moisture gets into the air space of the glass and causes condensation between the panes. Moisture in the window's cavity is not only unsightly but also reduces the effectiveness and efficiency of the glass unit. You can spot a cloudy or misty appearance in between the window panes. This is a sign that the seal between two panes is broken and moisture is leaking into your living space. The first thing you need to do is remove the glazing beads around the edges of the window. It can be tricky and messy, but it's worth the effort because you will have access to the wedge gasket which holds your glass in position. Repair My Windows And Doors is important to remove the beads with care so that they don't fall off. A little help from a friend can be a good idea at this point. After the beads have been removed then allow the sealed unit to loosen a bit of the frame. With a helper to hold it in place while you measure its size, height and width. This is important as it will determine the size of the wedge gasket that must be cut to accommodate the new double glazed sealed unit. Checking Double glazing units or sealed units, as they are often called, can break down over time. This is usually due an opening in the seal that allows condensation and moisture to enter the space between the panes. This will affect the ability of the window to keep cold air out, warmth produced by the heating system in, and solar gain from the sun inside. Failure of the seal can cause draughts to be felt in the home. Double-glazed windows must be inspected often for indications of failure. If you see moisture or misting between the glass, it is an indication that the seal is failing and a new one should be installed. If you do need to replace a sealed unit, it is crucial that the new one is of the right size to fit. The uPVC frames in which the sealed unit is set in are not tolerant of movement, so even just a few millimetres over can affect the performance of the window. To ensure that you're getting the correct size, it is best to seek advice from an expert or the manufacturer's manual. With a helper holding the new unit gently move it into the frame. It is essential that you make this move in a secure place since the glass is fragile and may break or fall out. Once the sealed unit has been secured in the frame, reattach any packers on the bottom of the frame, and then replace the glass beads in their original position. Once you've done this, give the entire window a visual inspection to ensure there are no gaps or misalignments that could impact its performance. It is possible to apply a small amount of sealant around the perimeter of the frame to prevent it from moving. It is also a good idea to check the thickness of the glass unit. Double-glazed units come in different thicknesses. If you choose the wrong one, it could have a negative effect on the value of your home. Sealing Double glazing can boost the efficiency of your home and also improve audio. Over time, the seals of the glass may get worn out, leading to condensation or drooping windows. In these instances it is necessary to replace the glass. It is a good idea to consult an experienced double glazing contractor who can assist you in selecting the appropriate glass, ensure accurate measurements, and ensure proper installation. When replacing a sealed unit the first thing you need to do is clean the frame. Make use of an old paintbrush (4 inches is the best) to clean the frame, getting rid of dust that has built up over time. Once the frame is clean it's best to give the seals that are new a thorough clean too. It is the easiest way to remove gaskets for the wedge from the friction joint by placing your hands on the edge of the gasket and pulling it out. Take note of the length of time you'll need the new seals. This will assist when cutting them. Installation of the sealed unit is straightforward once the frame and gaskets have been cleaned. It's a good idea to take off the beads (the UPVC frames clips that serve to hold the glasses) and measure the size of them. This will ensure that the seal is built to the right size, and that there are no gaps around it. After the beads are in place you can insert the top bead and then work your way round to the next three. Be careful not to touch your sealed units for a long time following the sealing process as the silicone needs time to set and harden before you are able to handle it again. I typically wait around 6 hours before handling it, but the sealant setting time will vary. Finishing When the new double-glazed unit is securely seated within its frame It's time to seal it and then finish. This is more than a physical conclusion to the work; it's an affirmation that your home is now ready to withstand the elements with its brand new, secure guardian safely in the right place. The first step is cleaning the frame and removing any glazing beads strips, or other materials that were used to hold the old glass. The frame is then cleaned of any dirt, old sealant, and glazing tape. This process also rejuvenates the aluminium or timber frame. This is also the moment to make any small repairs using wood filler and sanding, if needed. If you have a major issue it is recommended to seek out an expert. The spacer tubes will be filled with desiccants in order to absorb any moisture that might have been trapped between the two panes in the process of manufacturing or over time. This is a common practice for warm edge sealed unit. Thermoseal Group stocks a range of desiccants, as well as manual and automated dispensers of desiccant. After the spacers have been filled with glass, it is sealed with a high performance silicone that is designed to withstand the harsh conditions of Australia's climate. This sealant creates an airtight barrier that's extremely flexible and durable and can expand and contract without breaking. It is crucial to choose the right thickness since any gaps could affect the thermal performance. Ask a professional for advice or refer to the manufacturer's manual for more information on the right thickness for your. The final step is to apply a secondary sealant, which is typically polyisobutylene (PIB) or an equivalent product. This is applied along the outside edges of frames to form an additional seal. It can repel moisture and prevent air infiltration, improving the efficiency of the energy. The frame is then completed with aluminum cladding. This protective coating can endure the elements and keep your frame looking fresh for many years. It's a wise investment in the long-term durability of your home's frame especially in the case of period or federation homes where timber frames are prone to decay and rot.