What Is Replacement Sealed Double Glazing Units And Why Is Everyone Dissing It?

· 6 min read
What Is Replacement Sealed Double Glazing Units And Why Is Everyone Dissing It?

Replacing Double Glazed Units

Replacing double-glazed units is a home improvement task that can greatly reduce heat loss, improve noise insulation and lower heating bills. Modern coatings and argon/krypton gas-filled units make them very energy efficient.


The new unit, made according to precise measurements, awaits its time and requires care and precision. This is the moment that stops the clock and puts everything into perspective.

Removing the Old Unit

Removing the old unit is an essential step to ensure that your new double glazed window is built according to the exact measurements. Clean the frame with care to remove any dust, dirt, or old sealant. Repair any damage that's present. Small repairs can be made with sanding or wood filler, while major damage may require professional repairs.

When the glass is removed, it's crucial to determine its width, height and thickness. This can be accomplished by removing the glass beads that support the unit.  replacement sealed double glazed units Repair My Windows And Doors  requires patience and care. Be patient and wear safety gear to prevent slips and shards.

The best place to start is to remove the bottom bead from the glazing strip using a sharp chisel or sharp screwdriver with wide blades. After the bead is removed, it is advisable to seek assistance from a person who can hold the sealed unit while you remove the remaining beads. The unit is prone to fall from the frame and break.

Once all the beads have been removed, it's important to measure the width, height and thickness of the unit that is currently in use. The measurement data to accurately build a replacement unit. It will also serve as a guideline to ensure that the new unit is built properly for the frame. This is important because a mistake will not only result in the need to dismantle and reassemble the entire window but also affect its performance and efficiency. This is especially important in Australia where homes are often exposed to extreme weather conditions.

Preparing the Frame

If you are replacing a fixed window or a sliding door that has an opening or fixed sash, make sure the new unit is the correct size. UPVC frames have very little movement, and double-glazed sealed units that is just a couple of millimeters too big will not work. Take care when measuring, and consult an expert or manufacturer's manual for any necessary measurements.

When you have a clear understanding of the dimensions of your replacement and are sure that it's properly fitted, remove the glass from its frame. Wear safety equipment like gloves and work in a place that is well-lit to avoid injuries from glass fragments. Utilize a putty knife to remove the glazing beads or stripes that secure the glass to the frame, and remove them from the perimeter of the pane. You should avoid slipping the glass or straining frame.

When the frame is set to receive the brand new sealed double glazing unit, check whether it is capable of opening and closing smoothly. It should be a good fit, but you can alter this if needed by adding or removing packing. For instance, if the frame is a sliding door, you may need to add extra packers on the hinge's side and in the opposite corner to prevent the sash from colliding or rattling when it opens.

Finally, clean up the frame and take off any old glazing tape or sealant as required. Assess any damage, and make small repairs, if needed, using wood filler or sanding. The frame will be rehabilitated with a final cleaning and inspection so that it can withstand Australia's harsh weather for a long time.

Lifting the New Unit

Over time, double-glazed units can experience problems like condensation between panes or misting. This can affect the performance of your windows, allowing cold air to enter and warm air from your heater to escape, which can result in the cost of energy and discomfort.

This type of failure in seals is typically caused by aging general wear and tear or harsh chemical cleaners that degrade the sealing material. Sometimes however, the cause can be attributed to the shrinking and expanding of the glass as a result of temperature changes and seasonal changes.

After the frame has been cleaned and prepared, you can start lifting the new unit into the right place. This is an exciting step as you have just increased the efficiency of your home's heating during winter and cooling during the summer, while reducing your energy bill.

Before securing the unit it is crucial to ensure that the new unit fits into the frame. This phase is important to avoid damaging the frame and the glass.

If you are using glazing tape or sealing tape on your windows, now is the moment to apply a small bead around the perimeter of the glass. This creates a solid barrier that blocks air and moisture from getting into the window. Make certain to tighten the sealant with care but not so much that it stresses the frame or glass. Enjoy your newly installed double-glazed windows and give yourself a pat for an excellent job!

Secure the Unit

With the new unit sitting snugly in the frame and a new layer of sealant covering its perimeter, this is the moment that marks the end of your project. The unit is now secure to hold up to Australia's varied weather, a guarantee of warmth in winter and coolness during summer. It's the moment that validates the accuracy of your measurement and removal, a proof of a product that has been designed to exact measurements.

It is important to find the right balance between the need to secure the unit and not stressing the glass. If it's too loose, the unit may lose its airtight seal. If it's too tight, it may cause damage to the frame or weaken the material. Each screw must be placed in its original place, and turned just enough to secure the unit without putting pressure too high.

This is the final step in a transformational project that improves a home's comfort as well as energy efficiency and appearance. With the new double-glazed unit firmly seated in the frame and securing the fresh sealant around its perimeter This is the moment to mark your work's completion.

The cavity that acts as an insulator between the panes of glass is filled with either argon gas or desiccant. Argon is, unlike air has a lower thermal conductivity, which can reduce heat transfer. Furthermore the desiccant absorbs water in the atmosphere, stopping mould and condensation from growing in the frame. The spacer bar is constructed of aluminum and is an essential component of the insulation system. The aluminium prevents the transfer of heat but also keeps the edge of the glass that is insulated warm to avoid condensation.

Verifying Your Work

After you've put in the new unit and applied a bead of silicone sealant around the edges it is essential to let it sit and set. Don't touch it! It will take at minimum four hours for the silicone sealant to attain its maximum strength and form an impenetrable barrier. While you wait, visually examine your work to determine if there are any gaps or issues that could impact the effectiveness or appearance.

This is also a great moment to inspect the frame and seals for signs of damage that need attention, and to assess whether replacement of the entire window is necessary. A damaged seal can significantly impact the efficiency of your home's energy use as it can lead to drafts and cold spots. It can also let UV rays enter the home and cause furniture to fade, and carpets and curtains to wear out faster.

If you're experiencing any of these issues, it is an indication that your double-glazed windows need replacement. It can help you save money on your energy bills and also create a more peaceful and comfortable home.

It is a technical and labor-intensive process that requires the right equipment, precise measurement and careful preparation. It is not an DIY task, and should only be carried out by a professional in uPVC windows and doors who can ensure the proper fitting of the replacement unit, to keep your house safe from the elements. Their expertise and knowledge will ensure that your double-glazed unit is quiet and efficient blend of warmth in winter and coolness in summer, securing your home from the weather.