Replacement Double Glazed Units
Double-glazed units, or sealed units, as they're called, may be damaged over time. This happens when the insulating properties of the inert gases between the glass panes degrade.
If a window has fallen down, it's crucial to replace it to ensure your home is fully insulated and energy efficient. Luckily, the task is easy and straightforward to do at home.
Installation
If the window has been installed correctly the new unit will fit firmly in place and sit comfortably inside the frame. If the new glazed window is not the same thickness that your old one was you may need to adjust the 'packers' (usually red or bluish plastic slips) inside the frame. Ask your installer for instructions provided by the manufacturer if you're uncertain.
A good quality replacement double-glazed sealed unit is made to the highest standards and should fit in your frame with a minimum of fuss. A small mistake can have an enormous impact on the performance of your window, and must be inspected carefully.
Modern double-glazed units are an energy efficient addition to any home. They apply of argon in between the panes glass to keep them warm and decrease the amount of heat that escapes from your home in cold weather.
However, there are times when these units fail or have issues with their seals. This is usually the case when moisture enters the air cavity of the glass, causing condensation between the panes. The presence of moisture in the cavity of your windows is not just unsightly, but also decreases the efficiency and effectiveness of the glass unit.
Look for a fogginess or misty appearance in between the window panes. This could be a sign that the seal between the two glass panes has broken down and water is entering your living spaces.
The first thing you need to do is to take off the glazing beads around the edges of the window. This can be complicated and messy but is well worth the effort since it allows you to access the wedge gasket that holds your glass in place. It is crucial to take care when removing the beads so that they don't fall off. A little help from a friend can be helpful at this point. Once the beads are removed, allow the sealed unit a little to fall out of the frame. With the help of a person to hold it in place while you determine its length, width and height. This information is essential because it will determine the size wedge gasket to cut for your newly double glazed sealed units.
Checking
Double glazing units, or sealed units as they are usually called, can degrade over time. This is usually due to a leak in the seal, which allows moisture and condensation into the space between the panes. This will affect the ability of the window to keep cold air out, warm air generated by the home's heating in, and solar gain from the sun inside.
The failure of seals can cause draughts inside the home. It is essential to check regularly your double glazed windows for indications of failure. A misting or a haze of moisture in the glass is an indicator that the seal has failed and a replacement unit should be installed.
It is crucial to replace the sealed unit with the proper size. The uPVC frames that the sealed unit is installed have a very small tolerance for movement, meaning that even a few millimetres can alter the performance of windows. Talk to a professional or consult the guidelines supplied by the manufacturer to ensure that you get the correct size.
Insert the new piece of glass into the frame with the help of a friend. This should be done in a safe location as the glass could break if it falls out. Once the sealed unit is secured within the frame, re-attach any packers on the bottom of the frame, and then place the glazing beads back in their original positions. After you have completed this, give the entire window a visual examination to ensure that there aren't any gaps or areas of misalignment that could affect its performance.
You may need to add some sealant around the perimeter of the frame in order to prevent it from moving. Checking the thickness of the unit is also a good thing to do. This is crucial since double-glazed units come in various thicknesses, and using the wrong thickness can affect the u-value of your home's insulation.
Sealing
Double glazing can boost the thermal efficiency of your home and improve sound insulation. However, with time, the glass's seals may be damaged, resulting in misty windows and a decrease in performance. In these cases replacement is required. It is a good idea for you to work with an experienced double glazing installer who can help you choose the appropriate glass, ensure accurate measurements and ensure proper installations.
The first thing that needs to be done when replacing the sealed unit is to clean the frame. Use a paintbrush from the past (4 inches is the best) to clean the frame, removing dust that has accumulated over time. replacement sealed units 's a good idea to clean the seals that have been installed after the frame has been cleaned. It is easy to remove gaskets for the wedge from the friction joint by placing your hands on the edge of the gasket and pulling it out. Make a note of how long you need the new seals. This will aid in cutting them.
After the gaskets have been cleaned and the frame is cleaned it's time to install the sealed unit. It's a great idea to take off the beads (the UPVC frames clips that hold the glasses) and then measure the size of them. This will ensure that the seal is built to the right size and will not leave any gaps around it.
Once the beads are back in place you can insert the first bead and proceed to the next three. After sealing the units, you must not touch them for a few hours because the silicone sealant has to harden and set. I usually let it sit for about 6 hours prior to handling but this will vary based on your silicone sealant's set times.
Finalization
After the double-glazed unit is snugly in place within its frame and is sealed, it's time to seal and complete. This isn't just an aesthetic finalization of the project but also a declaration that your home will be ready to weather the elements now that its new secured guardian is installed.
The first step is to clean the frame carefully removing any glazing strips or beads that held the old glass. The frame is then cleaned of dirt, sealant or glazing tape. This process also rejuvenates the frame made of timber or aluminium. It's also a good time to assess any damage and make small repairs, using wood filler or sanding when required. For more serious damage you must seek out an expert.
Next, the tubes for the spacer are filled with desiccants to adsorb any moisture that might be trapped in-between the two glass panes during the process of manufacturing or after time. This is a common practice for warm edge sealed unit. Thermoseal Group stocks desiccants as well as manual and automated desiccant dispensing machines.
After the spacers have been filled with the spacers, the glass and frame are sealed with a high-performance silicone, specifically designed to withstand Australia's harsh climate. The sealant creates an airtight barrier that's extremely flexible and durable, and can expand and contract without breaking. It is important to use the correct thickness as any gaps could impact thermal performance. If you're not sure of the proper thickness, consult with a professional or manufacturer's guide.
The last step is to apply secondary sealant, typically polyisobutylene (PIB) or an equivalent product. It's applied to the edges of the frame's exterior and creates a secondary seal that's capable of repelling moisture and stop air penetration, helping to increase energy efficiency.
The frame is then adorned with an aluminum cladding. It's a protective coating that is able to withstand the elements, keeping your frame looking like new for a long time to be. This is a smart investment to ensure the durability and beauty of your home's frames, particularly if you have period or federation style homes with timber frames that are prone to rot.