Replacement Double Glazed Units
Over time, double-glazed units (or sealed units as they are commonly called) may break down. This occurs when the insulating properties of the gasses that insulate the glass panes degrade.
If a window has been damaged down, it is essential to replace the unit to ensure that your home is fully insulated and energy efficient. The task is relatively simple and straightforward.
Installation
If the window was fitted correctly, the new unit should be able to fit comfortably and securely inside the frame. If the new glazed panel isn't the same thickness as your old one you may need to adjust the 'packers' (usually blue or red plastic slips) inside the frame. If Repair My Windows And Doors are unsure what to do, consult your installer or the manufacturer's instructions for guidance.
A good replacement double-glazed sealed unit will be manufactured to the highest standards and should fit into your frame with a minimum of hassle. A small mistake can have a major impact on the performance of your window and should be examined carefully.
Modern double glazed units are a fantastic energy efficient addition to any home. They apply of argon in between the panes glass to provide insulation and cut down on the amount of heat that escapes from your home during cold winter.
However, sometimes these units can break down or develop problems with their seals. This usually occurs when moisture gets into the air cavity of the glass and creates condensation between the panes. Moisture in the window's cavity is not only unsightly but also affects the effectiveness and efficiency of the glazed unit.
Condensation can be caused by a range of factors and the best method to test for it is to look for a cloudy or misty appearance between your window panes. This indicates that the seal between the two glass panes has broken down and moisture is leaking into your living spaces.
The first step is to remove the glazing beads around the edges of your window. It can be tricky and messy, but it's worth the effort because you will have access to the wedge gasket that holds the glass in place. It is essential to remove the beads carefully so that they don't fall off. Asking for help can be a good idea at this stage. After the beads are removed, allow the sealed unit to fall back slightly from the frame and with an assistant, hold it in place while you precisely measure the width, height and also the thickness. This is important because it will determine the size of the wedge gasket that must be cut to accommodate the new double glazed sealed unit.
Checking
Double glazing units, or sealed units as they are often called, can fail over time. This is usually due to a breach in the seal which allows condensation and moisture to infiltrate the space between the panes. This affects how the window is able to block out cold air, heat generated by the heating system within the home and solar gain inside.
A faulty seal can also cause draughts to be felt inside the home. Double-glazed windows must be examined regularly for signs of failure. A misting or a haze of moisture in the glass is a strong sign that the seal has failed and a replacement unit should be installed.
It is important that you replace the sealed unit with the proper size. The uPVC frames that the sealed unit sits in have little tolerance for movement so even tiny millimetres of excess can affect the performance of the window. Consult a professional or the guidelines 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. It is essential that you place it in a secure spot since the glass is fragile and could fall out and break. After the sealed unit is fixed to the frame, attach any packers that are on the bottom of the frame and then put the glazing beads into their original position. After you have completed this make sure you give the window a thorough visual inspection to ensure there are no gaps and that it is not misaligned.
It is also possible to apply a small amount of sealant to the outer edge of the frame to prevent it from shifting in the future. It is also a good idea to check the thickness of the glass unit. 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 increase the thermal efficiency of your home, and provide better acoustics. However, over time, the glass's seals can get worn out, leading to misty windows and a reduction in performance. In these instances replacement is required. It is a good idea to collaborate with a professional double glazing installer who can help choose the right glass products as well as ensure precise measurements and ensure that the installation is done correctly.
If you are replacing a sealed unit the first thing you need to do is clean the frame. You can use an old paint brush (4 inches is the ideal size) to sweep the frame clean, removing dust and cobwebs which accumulate within the frame over time. After the frame has been cleaned, it's best to give the seals that are new a thorough clean too. The most efficient method to do this is to lever out the Wedge gaskets by placing your fingers on the edge and then pulling it out until you reach the point where it overlaps with the friction joint. You should also make a note of the length you require to make your new seals, as it will help in cutting them to the required size.
Installation of the sealed unit is straightforward after the gaskets and frame have been cleaned. It's a great idea to take off the beads (the UPVC frames clips that are used to hold the glasses) and measure them. This will ensure the seal is constructed to the correct size and there aren't any gaps in it.
Once the beads are back in place, you can put in the top bead and then proceed to the other three. After sealing the units, do not touch them for a few hours as the silicone sealant must set and harden. I usually let it sit for about 6 hours prior to handling, but this can differ based on your silicone sealant's setting times.
Finalization
After the double-glazed unit is secure within its frame and is sealed, it's time to seal and complete. This step is more than a physical closure to the project. It's an affirmation that your home is now ready to withstand the elements with its new safe guardian in place.
The first step is to clean the frame carefully removing any glazing strips or beads that bonded the old glass. Then, the frame is clean of dirt and sealants that have been used for years, as well as glazing tape, a process that also rejuvenates the timber or aluminium of the frame of the window. It is also a good time to assess any damaged areas and make minor repairs by using wood filler or sanding as required. Major damage should be referred to a professional to repair.
Next, the tubes that are used as spacers are filled with desiccants to absorb any moisture that might be trapped in-between the two glass panes in the course of manufacture or later on. This is the standard procedure for a warm edge seal. Thermoseal Group stocks desiccants as well as manual and automated desiccant dispensing machines.
After the spacers have been filled with glass, the frame and glass are sealed using a high-performance silicon, designed to tolerate Australia's harsh climate. The sealant creates an airtight seal that is both flexible and durable that can expand and contract without breaking. It's crucial to select the right thickness, as any gaps could affect the thermal performance. If you're not sure of the proper thickness seek advice from an expert or a manufacturer's guide.
The final step is adding secondary sealant. It is typically polyisobutylene, or a similar substance. It is applied to the edges of frames to create a secondary seal. It can repel moisture and prevent air infiltration, thus increasing the efficiency of the energy.
The frame is then adorned with an aluminum cladding. This protective coating is able to be able to withstand the elements and keep your frame looking brand new for many years. This is a smart investment to ensure the longevity and the beauty of your home's frames, particularly if have period or federation style homes that have timber frames that are susceptible to rot.