Replacement Double Glazed Units
Over time, double glazed units (or sealed units as they are often called) may break down. This occurs when the insulating properties of gasses that insulate the glass panes break down.
It is crucial to replace a damaged window to ensure that your home is energy efficient and insulated. The task is relatively easy and straightforward.
Installation
If the window has been properly installed, the new window will be firmly seated and sit comfortably inside the frame. If the new glazed unit is not the same thickness as the previous one, you may have to modify the existing 'packers' (usually blue or red slips of plastic) in the frame to ensure that it is properly positioned. Ask your installer for instructions of the manufacturer if you're uncertain.
A high-quality replacement double glazed seal will be manufactured to the highest standards and should fit in your frame with a minimum of hassle. However, a small error can have a major impact on the performance of your window, and should therefore be checked with care.
Modern double glazed units are an energy efficient addition to any home. They are constructed with an argon gas layer between the panes to insulate and thereby reduce the amount of heat that could escape from your home during cold weather.
Sometimes, these units may develop problems with their seals. This happens when moisture enters the air cavity and results in condensation. Moisture in your window cavity is not only unsightly, but it also reduces the efficiency of the glass unit.
Check for a fogginess or misty look 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 step is to take the glazing beads off around the edges of your window. It can be difficult and messy, but it is worth the effort since it allows you to access the gasket that holds your glass in place. It is important to remove the beads carefully so they don't break. 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 fall slightly from the frame. Then, using an assistant, hold it in position while you measure it accurately height, width and the thickness. This is crucial because it will determine the size of the wedge gasket that you need to cut for the double glazed unit.
Checking
Double glazing units, or sealed units as they are often called, can fail in time. This is usually due to a leak in the seal that allows moisture and condensation into the space between the panes. This can affect the capacity of the window to keep cold air out, warm air generated by the home's heating in, and solar gain from the sun inside.
Failure of the seal can cause draughts within the home. It is important to regularly check your double-glazed windows for signs of failure. If you see water or mist forming between the glass, it is an indication that the seal is not working and a new unit should be installed.
It is essential to replace the sealed unit with the proper size. The uPVC frames on which the sealed unit is positioned have a very limited tolerance for movement, which means that even a few millimetres could alter the performance of windows. Talk to a professional or consult the instructions provided by the manufacturer to ensure that you purchase the right size.
With a helper holding the new unit gently place it in the frame. It is essential that you do this in a secure spot since the glass is fragile and can fall out and break. Once the sealed unit has been fixed to the frame, reconnect any packers at the bottom of the frame, and then reinstall the glazing beads into their original positions. After you've completed this, give the window an inspection thoroughly to ensure that there aren't any gaps and that it is not misaligned.
It is also possible to apply a bit of sealant to the perimeter edge of the frame to prevent it from moving in the future. Re-checking the thickness of the unit is recommended. Double glazed units come in various thicknesses. If you choose the wrong one, it can have a negative impact on the value of your home.
Sealing
Double glazing can improve the efficiency of your home and also offer better acoustics. Over time the seals on the glass can be worn out, resulting in windows that are drooping or misty. In replace double glazing seals is required. It's a good idea work with a double glazing expert who can help you choose the best glass products, make precise measurements and ensure proper installation.
The first thing that needs to be done when replacing the sealed unit is to clean the frame. You can make use of an old paintbrush (4 inch is the best) to sweep the frame out, removing dust and cobwebs that have built up within the frame over time. After the frame has been cleaned, it's a good idea to give the new seals a thorough clean too. It is easiest to remove gaskets for the wedge from the friction joint by placing your fingers along the edge of the gasket and pulling it out. It is also important to make notes of the length that you need to make your new seals, as it will be useful in cutting them to the required size.
The installation of the sealed unit is straightforward once the frame and gaskets have been cleaned. To get the best results from this it's a good idea to cut off the beads (the UPVC frame clips that are used to hold the glass) and then measure these. This will ensure that the seal is built to the correct size and will not leave gaps around it.
After the beads have been placed back in, you are able to begin with the top one and work your way down to the other. You should be careful not to touch the sealed units for a long time afterward, as the silicone sealant will need some time to set and become hard before you can handle it again. I typically wait around 6 hours before handling it, but the silicone sealant's time to set will differ.
Finishing
After the double-glazed unit is securely seated within its frame and is sealed, it's time to seal it and then finish. This step is not just an aesthetic finishing touch to the project it also signifies that your home will be well-equipped to stand the test of time after the new, secure guardian is in place.
The first step is to clean the frame, carefully removing any glazing strips or beads that bonded the old glass. The frame is free of dirt, old sealant, and glazing tape, a procedure which also renews the timber or aluminium of the frame of the window. This is also the moment to make any small repairs by using wood filler or sanding, if necessary. Major damage should be referred to a professional to repair.
The spacer tubes are filled with desiccants to absorb any moisture trapped between the two glass panes in the course of manufacture or later on. This is a typical procedure for warm edge sealed units. Thermoseal Group stocks a range of desiccants as well as manual or automated dispensers of desiccant.
After the spacers have been filled and sealed, the glass is then sealed with a high-performance silicone that's designed to withstand Australia's harsh climate. This sealant forms an airtight barrier that is both durable and flexible that can expand and contract without breaking. It's important to use the correct thickness, as any gaps could impact the thermal performance. If you're unsure of the proper thickness you should consult an expert or the manufacturer's guidelines.
The last step is to apply an additional sealant, usually 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 block air infiltration, improving energy efficiency.
The frame is then adorned with an aluminum cladding. This protective coating can be able to withstand the elements and keep your frame looking brand new for many years. It's a wise investment in the long-term stability of your home's frame particularly in the case period or federation homes where wooden frames are susceptible to rot and degradation.