Replacement Double Glazed Units
Over time, double glazed units (or sealed units as they are usually known) will break down. This usually happens due to the insulating properties of the inert gas between the glass panes breaks down.
It's important to replace a broken window to ensure that your home is energy efficient and insulated. The task is simple and straightforward.
Installation
If the window has been installed correctly, the new unit will fit snugly and will fit comfortably within the frame. If the new glazed unit is not of the same thickness as the older one then you may need to alter the "packers" (usually blue or red slips of plastic) within the frame to ensure that it sits properly. Check with your installer or the instructions of the manufacturer if you're unsure.
A top-quality replacement double-glazed sealed unit is made to exacting standards and should fit into your frame with ease. A minor mistake can have a significant impact on the performance of your window.
Modern double glazed units are an energy efficient addition to any home. They use an argon gas layer between the panes in order to insulate and thus reduce the amount of heat that could escape your property during cold winter months.
However, sometimes these units may break down or develop problems with their seals. This typically happens when moisture enters the air space of the glass, causing condensation between the panes. Moisture in the window's cavity is not just ugly, but also reduces the efficiency and effectiveness of the glazed unit.
Look for a fogginess or misty look between your window panes. This could be a sign that the seal between the two panes of glass has broken down and moisture is leaking into your living spaces.
double glazing window seal repair is to take the glazing beads off around the edges of your window. It can be tricky and messy, but it is worth it as you will have access to the wedge gasket which holds your glass in position. It is crucial to remove the beads with care to ensure they don't break. Asking for help can be a good idea at this point. Once the beads have been removed and the sealed unit is free of them, allow it to loosen a bit of the frame. With a helper holding it in place while you accurately determine its length, width and height. This is important because it determines the dimensions of the wedge gasket you need to cut for the new double glazed sealed unit.
Checking
Double glazing units or sealed units, as they are often called, can degrade over time. It is usually due to an opening in the seal that allows moisture and condensation into the space between the panes. This can affect the way the window is able to block out cold air, heat generated by the heating system inside the home and solar gain inside.
Failing seals can also cause draughts within the home. It is important to regularly check your double glazed windows for indications of failure. If you notice moisture or mist forming between the glass, this is a sign that the seal is failing and a replacement unit must be installed.
If you do need to replace a sealed unit it is crucial that the replacement unit is of the right size to fit. The uPVC frames that the sealed unit is placed have a very limited tolerance for movement, so even a few millimetres of movement can impact the performance of the windows. Get advice from a professional or follow the guide that is provided by the manufacturer to ensure that you purchase the right size.
Slide the new unit into the frame with the help of a friend. This must be done in a safe place as the glass can break if it falls out. Once the sealed unit is securely in the frame, reconnect any packers at the bottom of the frame and then place the glazing beads back into their original position. Once you have done this give the whole window a visual examination to ensure that there are no gaps or misalignments that could impact its performance.
You may also need to apply a small amount of sealant around the perimeter edge of the frame to stop it from moving in the future. It is recommended to check the thickness of the glass unit. This is essential since double glazed units are available in various thicknesses, and if you choose the wrong one, it can affect the u-value of your home's insulation.
Sealing
Double glazing is a fantastic method to increase the efficiency of your home's heating system and enhance sound quality by reducing the transfer of sound. However, with time, the glass's seals may be damaged, resulting in misty windows and a decrease in performance. In these cases, replacement is necessary. It is a good idea to collaborate with a professional double glazing installer who can help you choose the appropriate glass, ensure accurate measurements and ensure that the installation is done correctly.
The first thing to be done when replacing a sealed unit is to clean the frame. You can use an old paint brush (4 inches is the ideal size) to sweep the frame out by removing dust and cobwebs that have built up in 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 way to do this is to lever out the gaskets on the Wedge by placing your fingers on the edge, and then pulling it out until you reach the point where it overlaps with the friction joint. Make a note of the length of time you'll need your new seals. This will help when cutting them.
Installing the sealed unit is straightforward once the frame and gaskets have been cleaned. To get the best results when doing this, it's best to remove the beads (the UPVC frame clips that hold the glass) and then measure these. This will ensure that the seal is made to the correct size and will not leave gaps around it.
After the beads have been put back in, you can begin with the top one and move down to the other. Be cautious not to touch the sealed units for a while afterward as the silicone sealant will require time to set and become hard before you can handle it again. I usually wait about 6 hours to handle it, but the sealant's setting time can vary.
Finalization
The sealing and finalization of the project is now required once the new double-glazed unit has been securely installed within its frame. This isn't just an aesthetic finalization of the project it also signifies that your home will be ready to weather the elements with its new safe guardian is in place.
The first step is to clean the frame, carefully removing any glazing beads or strips that secured the old glass. The frame is then cleaned of dirt, old sealant, and glazing tape. This process also rejuvenates either the frame made of timber or aluminium. It's also a good time to look over any damage and make small repairs using wood filler or sanding if required. For more serious damage you must seek out a professional.
The spacer tubes will then be filled with desiccants in order to absorb any moisture that might have accumulated between the two panes during production or over time. This is a common practice for warm edge sealed units. Thermoseal Group stocks a range of desiccants and manual or automated dispensers for desiccant.
After the spacers are filled, the glass is sealed with a high-performance silicone that's designed to withstand the harsh conditions of Australia's climate. This sealant forms an airtight barrier that is extremely flexible and durable and can expand and contract without breaking. It is essential to choose the right thickness, as any gaps could impact thermal performance. If you're unsure of the correct thickness to use you should consult an expert or a manufacturer's guide.
The final step is to apply a secondary sealant, which is typically polyisobutylene (PIB) or similar products. This is applied along the edges of frames to form a secondary seal. It is able to repel moisture and block air infiltration, improving the efficiency of the energy.
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 smart investment for the long-term stability of your home's frame especially in the case of federation or period homes where wooden frames are susceptible to rot and degradation.