Replacing Double Glazed Units
Replacing double glazed units is a project for home improvement that can greatly reduce heat loss, improve insulation from noise and reduce heating bills. With modern coatings and argon, or krypton gas fills they are also extremely energy efficient.
The new unit, made to exact measurements, awaits its place and calls for attention and precision. This is the moment that stops time and puts everything in perspective.
Take the old unit out of the way
It is important to remove the old window to ensure that the new double-glazed window has been constructed to the exact measurements. Clean the frame thoroughly to get rid of dust, dirt, or old sealant. Repair any damage that may be present. Sanding and wood filler can be used to repair minor damage, but major damage may require professional assistance.
Once the glass has been removed, it is essential to measure its width, height and thickness. This can be accomplished by removing the glass beads that hold the unit. This is a delicate process that requires patience and care. Be patient and wear safety gear to avoid shards and slips.
Start by taking off the bottom of the glazing strip with the sharp end of a chisel or a wide-bladed screwdriver. After the bead is removed, it's recommended to get help from a person who can hold the sealed unit as you take out the remaining beads. This is because the device could easily fall out of the frame and smash.
After all the beads have been removed, it's crucial to take careful measurements of the dimensions of the width, height and thickness of the existing unit. The measurements can be used to accurately construct the replacement unit you want for your home. It will also serve as a reference to ensure that the new unit is built correctly for the frame. This is important because an inadvertent misfit could result in the need to dismantle and reassemble the entire window but it will also impact the efficiency and performance of the window. This is especially important in Australia where homes are frequently exposed to extreme weather conditions.
Preparing the Frame
If you are replacing an existing fixed sliding door or window using an opening or fixed sash make sure that the new unit is the correct size. UPVC frames have very little movement, and a double-glazed sealed unit that is just a few millimeters larger than the original is not going to fit. To ensure accurate measurements, measure carefully and seek the advice of a professional.
Remove the glass from the frame after you're certain that the replacement is of the correct size and has been properly fitted. Make sure you work in a well-lit location and wear safety equipment, such as gloves, to avoid injury from glass shards. Use a putty blade to cut off the glaze beads or stripes that secure the glass to the frame, and remove them from the perimeter of the pane. You should avoid slipping the glass or straining frame.
Once the frame is ready for the new sealed double glazing unit, check that it will be in a position to open and close effortlessly. You can alter the fit if needed by removing or adding packing. For replacement double glazed sealed units , if the frame is a sliding door you may have to add packers on the hinge and at the opposite corner to prevent the sash from colliding or rattle when it opens.
Finally, clean the frame and remove any old sealant or glazing tape as required. Assess any damage and make small repairs using wood filler, or sanding if necessary. The frame will be rejuvenated by a final cleaning and inspection and will be able to withstand Australia's harsh weather for years.
Lifting the New Unit
Over time, double glazed sealed units (or a 'sealed unit' as it is often known) may face problems like moisture between panes and/or misting. When this happens the effectiveness of your window is diminished by letting cold air in and allowing warm air from your heating system to escape which can result in higher energy bills and a the loss of comfort.
This kind of seal failure is typically caused by aging general wear and tear or harsh chemical cleaners that deteriorate the sealing material. Sometimes however, the reason could be due to the shrinking and expanding of the glass due to temperature changes and seasonal changes.
After the frame has been cleaned and prepared after which you can begin lifting the frame into the right place. This is an exciting step that you've made a significant improvement to your home, improving its temperature in winter and cooling in summer, whilst also helping reduce your energy bills.
It is essential to ensure the new unit is properly fitted into the frame prior to securing it to the frame. A little bit of care in this phase will help prevent any damage to the frame, and also the glass.
If your windows have glazing tape or sealant it's time to put a bead around the perimeter of the glass and frame creating a solid protection against air and moisture infiltration. Make sure to tighten the sealant carefully and ensure it's secure but not tight enough to strain the frame or glass. Finally, give yourself and a pat on the back for an excellent job, and enjoy your newly installed double-glazed window!
Securing the Unit
With the new unit sitting perfectly in the frame, and a fresh layer of sealant covering its edges, this is the moment that signifies the end of your work. The unit is finally secured to hold up to Australia's diverse weather and ensure warmth in winter and coolness in summer. This is the time when your meticulous measuring and removal is confirmed and a confirmation that the unit was crafted precisely to your specifications.
If a window is made of glass beads or screws fixing the new unit to the frame requires a delicate balance between tight enough to hold it in place and soft enough not to stress the glass. If it's too loose, then the unit may lose its airtight sealing. If it's too tight, it might cause damage to the frame or even warp the material. Each screw must find its original position by turning only enough to ensure that the unit is held securely without putting too much pressure on it.
This is the last step in a project that will increase the energy efficiency of a house and comfort as well as its appearance. The moment you are completed, you will have a brand new double-glazed unit firmly placed in the frame and a fresh bead along its perimeter.
The glass panes can be filled with either argon or a desiccant. Argon is, unlike air has a lower thermal conductivity, which can reduce heat transfer. Desiccants also help to absorb moisture from the air, preventing condensation and mould from the frame. The spacer bar, typically made of aluminum, is an essential component of the insulating system. Aluminium not only impedes heat transfer, but also keeps the edges warm of the window insulated to avoid condensation.
Checking Your Work
After you've put in the new unit and sprayed a bead of silicone sealant around the edges It is crucial 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, examine your work to determine if there are any gaps or issues that could impact the effectiveness or appearance.
This is also a great time to examine the seals and frames for signs of damage that require attention, and to assess whether replacement of the entire window is necessary. A faulty seal will significantly impact your home's energy efficiency and can cause drafts or cold spots. It can also let UV rays enter the home and cause furniture to fade, and carpets and curtains to wear out faster.
If you're experiencing any of these issues, it is a sign that your double glazing needs replacing. Making it a priority to replace it immediately can lower your energy costs and create a more comfortable and relaxed living space.
It is a technical and labor-intensive procedure that requires the appropriate equipment, precise measurements and careful preparation. It is not an DIY project and should be handled by a specialist who has prior experience working with uPVC Windows and Doors. They will ensure that the replacement unit is installed correctly to shield your home from the elements. Their experience will ensure the double-glazed model you choose is both efficient and quiet, providing warmth in winter and cooling in summer. This will shield your home from the elements.