Replacement Double Glazed Units

Over time double glazed units (or sealed units as they are often known) may break down. This is usually the case because the insulating properties in the inert gas between the glass panes degrade.

If a window has fallen down it's important to replace the unit to ensure your home is fully insulated and energy efficient. Luckily, the task is simple and easy to complete at home.

Installation

If the window was put in correctly, the new unit will fit snugly and securely within the frame. If the new glazed unit isn't of the same thickness as the previous one, then you might need to alter the "packers" (usually blue or red slips of plastic) inside the frame to ensure it sits properly. If you are unsure how to proceed, consult your installer or the manufacturer's instructions for guidance.

A high-quality replacement double-glazed window is manufactured to the highest standards and should fit your frame with no hassle. 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 can save you money. They utilize of argon in between the panes glass to insulate, and reduce the amount heat that can escape from your home during cold weather.

However, there are times when these units can break down or develop problems with their seals. This is usually the case when moisture is introduced into the air space of the glass, causing condensation between the panes. The moisture that is absorbed by the cavity of your windows is not only unsightly but also reduces the efficiency and effectiveness of the glass unit.

You can spot a cloudy or misty look between the window panes. This indicates that the seal between the two panes of glass has broken down and moisture is leaking into your living spaces.

The first step is to remove the glass beads that surround the edges of the window. This can be difficult and messy, but it's worth the effort since it allows you to access the gasket that holds your glass in place. It is necessary to remove the beads with care so that they do not break and it's often recommended to seek assistance at this point. Once the beads are removed then allow the sealed unit to slide a bit out of the frame. With a helper to hold it in place while you measure its size, height and width. This is crucial because it determines the dimensions of the wedge gasket must be cut to accommodate the double glazed unit.

Checking

Double glazing units, or sealed units as they are commonly called, can fail over time. This usually happens due to a break in the seal that allows condensation and moisture to infiltrate the space between the panes. This will affect how well the window can keep out cold air, heat generated by the heating system inside the home and solar gain inside.

A faulty seal can also cause draughts to be felt within the home. It is essential to check your double-glazed windows for signs of failure. A misting or a haze of moisture in the glass is a strong indicator that the seal has failed and a replacement sealed units near me unit is required.

If you must replace a sealed unit, it is vital that the replacement unit is the right size to fit. The uPVC frames in which the sealed unit is installed have a very small tolerance for movement, so even a few millimetres could alter the performance of windows. To be certain that you are ordering the correct size, it is best to seek advice from an expert or the manufacturer's guide.

Place the new unit into the frame with the help of a friend. It is crucial to make this move in a secure place because the glass is fragile and can be thrown out and break. After the sealed unit is secure in the frame, reconnect any packers on the bottom of the frame and then put the glass beads back in their original position. After you have completed this take the window for an inspection thoroughly to ensure there are no gaps, and that it isn't misaligned.

It is possible to apply a small amount of sealant around the edges of the frame to stop it from moving. Re-checking the thickness of the unit is also recommended. This is important as double-glazed units come in different thicknesses, and if you choose the wrong one, it can impact the u-value your home's insulation.

Sealing

Double glazing can boost the thermal efficiency of your home and also offer better sound insulation. Over time the seals of the glass may get worn out, leading to windows that are drooping or misty. In these situations it is necessary to replace the glass. It's a good idea work with a double glazing professional who will help you choose the best glass products, take accurate measurements, and ensure proper installation.

The first thing to be done when replacing sealed units in windows the sealed unit is to clean the frame. Use an old paintbrush (4 inches is the ideal size) to clean the frame, getting rid of dust that has accumulated over time. It's a great idea to clean the seals that have been installed after the frame has been cleaned. It is easy to remove the gaskets that are wedge-shaped from the friction joint by placing your hands on the edge of the gasket and pulling it away. Make a note of how long you need your new seals. This will help when cutting them.

Once the gaskets are clean and the frame cleaned up it's time for the sealed unit. It's a good idea to remove the beads (the upvc window rubber seal replacement near me frames clips that serve to 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.

After the beads have been reinserted, you can start with the top one and move to the lower ones. Be cautious not to touch the sealed units for a long time afterward as the silicone sealant needs time to set and become hard before you can handle it again. I typically leave it for about 6 hours before handling but this will differ based on your silicone sealant's set times.

Finalization

Finishing the project and sealing it is now required after the new double-glazed unit is been installed securely within its frame. This step is not just a physical finish to the project, it also signifies that your home is ready to weather the elements now that its new safe guardian is installed.

The first step is to clean the frame, by carefully removing any glazing beads or strips that secured the old glass. The frame is then cleaned of any dirt, old sealant, and glazing tape. This process also renews the frame made of timber or aluminium. It's also a good time to evaluate any damage and make small repairs by using wood filler or sanding as needed. For major damage it is recommended to consult a professional.

The spacer tubes will then be filled with desiccants to absorb any moisture that may be trapped between the two panes during manufacturing or over time. This is the standard procedure for a warm edge seal. Thermoseal Group stocks desiccants as well as manual and automated desiccant dispensing devices.

After the spacers have been filled with glass, the frame and glass are sealed unit repairs with a high-performance silicone, specifically designed to withstand Australia's harsh climate. The sealant creates a barrier that is both robust and flexible, able to expand and contract without becoming fragile or breaking. It's crucial to select the right thickness, as any gaps could affect the thermal performance. Consult a professional or the manual of the manufacturer in case you're not sure about the thickness you should use.

The final step is to apply a secondary sealant, typically polyisobutylene (PIB) or an equivalent product. This is applied to the edges of the frame's exterior which creates a secondary seal that's able to repel moisture and prevent air penetration and increase the efficiency of energy.

The frame is then finished with aluminum cladding. This is a protective coating that is resistant to the elements, keeping your frame looking brand new for years to be. It's a smart investment for the long-term durability of your home's frame particularly in the case of federation or period homes where wooden frames are susceptible to rot and degradation.