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Replacing Double Glazed Units Double glazed units can be substituted to cut down on heat loss and noise, and also reduce heating costs. Modern coatings and argon/krypton gas filled units make them very energy efficient. The new unit, which was built to exact measurements, is waiting for its spot. It requires care and precision. This is the moment that halts time and puts everything into perspective. Remove the Old Unit Removal of the old window is a crucial step to ensure that the new double-glazed window is constructed to exact measurements. Make sure to clean the frame of any dust, dirt or old sealant and repair any damage that may be present. Repairs of minor amounts can be made by using wood filler or sanding however major damage could require professional repairs. Once the glass has been removed, it is necessary to measure its width, height, and thickness. This can be accomplished by removing the glazing beads that hold the unit. This delicate procedure requires patience and prudence. It is recommended that you be patient and use safety gear to protect yourself from unexpected shards of glass and accidental slips. Start by stripping the bottom of the glazing strip with the sharp end of a chisel or a wide-bladed, sharp screwdriver. After the bead is removed, it's recommended to seek assistance from a person who can hold the sealed unit as you take out the remaining beads. The unit can easily be thrown off the frame and break. After removing replace window gasket , it is important to determine the width, the height, and the thickness of the present unit. The measurements can be used to construct a replacement unit for your home. Additionally, it will also provide a reference for ensuring that the new unit will fit into the frame. This is important because a misfit will not only cause the need to remove and rebuild the entire window, but will reduce its efficiency and performance. This is particularly relevant in Australia, where our homes are often subject to extreme weather conditions. Preparing the Frame If you are replacing an existing fixed sliding door or window that has a sash fixed or an opening sash make sure that the new unit is the proper size. UPVC frames have very little movement and a double-glazed sealed unit that is a few millimeters larger than the original will not fit. To ensure accurate measurements make sure you measure with care and consult a professional. Once you have a clear understanding of the dimensions of your replacement, and are confident that it is correctly fitted, remove the glass from its frame. Be sure to work in a well-lit space, and wear safety equipment such as gloves to avoid injury from shards of glass. Use a putty knife cut the glazing beads or strips that secure the glass in the frame from around the edges of the pane. It is important to avoid slipping the glass or straining frame. Check that the frame can open and close smoothly when the new sealed double-glazing unit is installed. It should be a snug fit, but you are able to adjust this if necessary by adding or removing packers. For instance, if your frame is a sliding door, you might need to add additional packers at the top of the hinge and at the opposite corners to stop the sash from getting caught or rattle when it opens. Finally, clean the frame and get rid of any old glaze tape or sealant in the event of need. Examine any imperfections and make minor repairs with wood filler or sanding, if required. The frame will be rehabilitated with a final cleaning and inspection, allowing it to withstand Australia's harsh weather for a long time. Lifting the New Unit Over time double glazed sealed units (or a 'sealed unit' as it is often called) may face issues such as moisture in-between panes and/or misting. If this happens, the effectiveness of your window can be diminished, letting cold air in and allowing warm air from your heating system to escape, leading to high energy bills and the loss of comfort. This kind of failure in seals usually occurs due to aging general wear and tear, or harsh chemical cleaners that deteriorate the sealing material. Sometimes however, the cause can be traced to the expanding and shrinking of the glass due to temperature fluctuations and seasonal changes. After the frame has been cleaned and prepared after which you can begin lifting the new unit into place. This is an exciting step, as you've just made a significant improvement to your home, enhancing its comfort in the winter months and cooling it in summer, whilst also aiding in reducing your energy bills. It is crucial to ensure that the new unit fits correctly in the frame prior to locking it in place. This phase is important to ensure that the frame isn't damaged and the glass. If your windows use glazing tape or sealant, now is the time to put a bead around the perimeter of the frame and glass, creating a strong barrier against moisture and air infiltration. Make sure to tighten the sealant carefully making sure it's secure, but not too tight to strain the glass or frame. Don't forget to give yourself a pat on the back for a job well done, and enjoy your new double-glazed window! Secure the Unit This is the time when you are done. The unit will be snugly placed in the frame and a fresh sealant will cover its perimeter. The unit is now secure to withstand Australia's varying weather conditions, which is a guarantee for warm temperatures in winter and cool temperatures in summer. This is the time when your meticulous measurements and removal is validated as a proof that the unit was crafted according to the exact dimensions. It is important to find the perfect balance between the need to secure the unit and not overstressing the glass. If it's too loose, the window may lose its airtight seal. If it's not tight enough, it may damage the frame or warp material. Each screw has to find its original place by turning only enough to hold the unit firmly without putting too much pressure on it. This is the last step in a transformational project that improves a home's comfort and energy efficiency as well as its appearance. With the new double-glazed unit sitting snugly within the frame, and securing the fresh sealant around the perimeter it is the moment to mark the end of your work. The space between the glass panes can be filled with argon or a desiccant. In contrast to air, argon has much lower thermal conductivity and reduces heat transfer through glass. Additionally desiccants absorb water in the atmosphere, preventing condensation and mould from forming in the frame. The spacer bar is made of aluminum and is an essential component of the insulation system. The aluminum bar not only blocks heat transfer but also keeps the edge of the window that is insulated to prevent condensation. Be sure to check your work After you've put in the new unit and applied the silicone sealant around the edges it is essential to allow it to set. Don't disturb it! It takes at least four hours for the silicone sealant to attain its maximum strength and create an impenetrable barrier. While you wait, take the opportunity to visually evaluate your work and see if you are able to identify any gaps or issues that could compromise the effectiveness or appearance of the device. It is also a great opportunity to check the frame and seals to see if there are any signs of damage and determine if the whole window needs to be replaced. A faulty seal will have a significant impact on the efficiency of your home's energy use, causing drafts or cold spots. It also allows UV rays enter the home, causing furniture to fade, and curtains and carpets to wear down more quickly. If you're experiencing any of these problems, it is an indication that your double glazing is in need of replacement. If you take care of it promptly, it will lower your energy costs and create a more comfortable, relaxed home environment. Replacing a sealed double-glazed unit is a laborious and technical procedure that requires the appropriate equipment, careful preparation and precise measurement. It is not an DIY task, and should be handled by a professional in uPVC windows and doors who can guarantee that the right fit is made for the replacement unit, and protect your home from the elements. Their skill and experience will ensure that your double-glazed unit is a quiet and efficient balance of warmth in the winter and coolness in summer, securing your home from the elements.