Replacement Double Glazed Units
Over time double glazed units (or sealed units as they are often called) may break down. This is usually the case when 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 well-insulated. Fortunately the task is relatively easy and straightforward to do at home.
Installation
If the window has been installed correctly, the new unit will be firmly seated and will fit comfortably within the frame. If the new glazed unit isn't of the same thickness as the old one, then you might need to adjust the existing 'packers' (usually blue or red slips of plastic) within the frame to ensure that it is properly placed. Consult your installer or the instructions of the manufacturer if you're not sure.
A top-quality replacement double-glazed sealed unit is made to exacting standards, and should fit into your frame with ease. A small error can have a huge impact on the performance of your window.
Modern double-glazed units are a fantastic addition to any home. They are energy efficient and save you money. They utilize a layer of argon gas between the panes to insulate and thus reduce the amount of heat that will escape from your home during cold weather.
However, in some cases, these units can fail or have issues with their seals. This typically happens when moisture is introduced into the air cavity of the glass, causing condensation between the panes. The moisture that is absorbed by the window's cavity is not just unsightly, but also decreases the effectiveness and efficiency of the glazed unit.
You can spot a cloudy or misty appearance in between your window panes. This could be a sign that the seal between the two panes of glass has been broken and moisture is leaking into your living spaces.
The first thing you need to do is to remove the glazing beads around the edges of your window. It can be a bit tricky and messy, but it is worth it because you will have access to the wedge gasket which holds your glass in position. double glazing window seals replacement will need to remove the beads with care so that they don't break, and it's usually a good idea to seek help at this point. After the beads have been removed then allow the sealed unit to slide a bit out of the frame. With the help of a person holding it in place while you determine its length, width and height. This is important because it will determine the dimensions of the wedge gasket that you will 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. This is usually due leaks in the seal, which allows moisture and condensation into the space between the panes. This affects the ability of the window to keep cold air out, warm air produced by the heating system in and solar gain from the sun's rays inside.
Failing seals can also cause draughts to be felt within the home. It is crucial to check your double glazed windows for signs of failure. If you notice moisture or mists between the glass, it is an indication that the seal is not working and a new unit should be installed.
It is crucial to replace the sealed unit with the proper size. The uPVC frames which the sealed unit is placed in have little tolerance for moving, so even tiny millimetres of excess can have an impact on the performance of the window. Get advice from a professional or follow the guidelines that is provided by the manufacturer to ensure you get the correct size.
With a helper holding the new unit, gently place it in the frame. This must be done in a secure location as the glass could break if it falls. After the sealed unit is securely in the frame, reconnect any packers at the bottom of the frame and then place the glazing beads back in their original positions. Once you've completed this, give the window an extensive visual inspection to make sure there aren't any gaps and that it is not misaligned.
You may have to add a small amount of sealant around the frame's perimeter to prevent it from moving. It is recommended to check the thickness of the glass unit. This is important as double-glazed units come in various thicknesses and if you choose the wrong one, it could affect the u-value of your home's insulation.
Sealing
Double glazing is an excellent method to increase your home's thermal efficiency as well as improve audio quality by cutting down on the transfer of sound. Over time, the seals on the glass can wear out resulting in condensation or drooping windows. In these instances it is necessary to replace the glass. It is recommended for you to work with an experienced double glazing installer who can help choose the best glass products, ensure accurate measurements, and ensure proper installation.
The first thing to be done when replacing a sealed unit is to clean the frame. You can use an old paint brush (4 inch is the best) to clean the frame by removing dust and cobwebs which have built up within the frame over time. It's a great idea to clean the new seals once the frame has been cleaned. It is easiest to remove the wedge gaskets from the friction joint by placing your fingers on the edge of the gasket and pulling it out. Take note of how long you need your new seals. This will aid in cutting them.
Once the gaskets are clean and the frame is clean, it's time to put in the sealed unit. To get the best results when doing this, it's recommended to remove the beads (the UPVC frame clips that support the glass) and then take measurements of 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. After sealing the units, you should not touch them for a few hours as the silicone sealant must set and harden. I usually leave it for about 6 hours before handling, but this can vary based on your silicone sealant's set times.
Finalization
The sealing and finalization of the project is now required once the double-glazed unit has been snugly installed within its frame. This is more than just a physical closure to the project; it's an assurance that your home is ready to weather the elements with its new secure guardian securely in its place.
The first step is to clean the frame carefully removing any glazing strips or beads that held the old glass. The frame is clean of dirt and old sealant as well as glazing tape, a procedure that also rejuvenates the timber or aluminium of the frame of the window. This is also the time to make any small repairs with wood filler and sanding, if needed. If you have a major issue, you should consult an expert.
The tubes for the spacer are filled with desiccants to adsorb any moisture trapped between the two panes of glass in the course of manufacture or later on. This is a standard procedure for units with warm edges. Thermoseal Group stocks a range of desiccants as well as manual or automated dispensers for desiccant.
After the spacers are filled with glass, the frame and glass are sealed with a high-performance silicone, specifically designed to withstand Australia's harsh climate. This sealant creates an airtight seal that is both flexible and durable, and can expand and contract without breaking. It is crucial to choose the correct thickness as any gaps can affect thermal performance. Ask a professional for advice or refer to the manufacturer's guide in case you're not sure about the right thickness for your.
The final step involves adding secondary sealant. It is typically polyisobutylene or a similar material. This is applied along the edges of frames to create an additional seal. It can repel moisture and block air infiltration, thereby increasing the efficiency of the energy.
The frame is then finished with an aluminum cladding. This is a protective coating that is resistant to the elements, keeping your frame looking new for a long time to come. This is a wise investment to ensure the durability and beauty of your home's frames, particularly if have federation or period style homes that have timber frames that are prone to decay.