Notes

It Is Also A Guide To Replacement Sealed Double Glazing Units In 2024
Replacing Double Glazed Units

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

The new unit, made to exact measurements, awaits its moment and demands attention and precision. This is the moment that stops the clock and puts everything into perspective.

Removing the Old Unit

It is crucial to remove the old window to ensure that your new double-glazed window is constructed to the exact measurements. Clean the frame carefully to remove any dust, dirt, or old sealant. Repair any damage that may be present. Wood filler and sanding may be used to repair minor damage, but major damage may require professional repair.

When the glass is removed, it is important to measure its height, width, and thickness. The best way to do this is to take out the glass beads that bind the unit. This is a delicate procedure that requires patience and prudence. It is recommended to take your time and always use safety gear to protect yourself from unexpected shards glass and accidental slips.

Start by removing the lower part of the glazing strip with a chisel that is sharp, or a wide-bladed, sharp screwdriver. It is best to ask someone to hold the window unit while you remove all the beads. The unit could fall from the frame and break.

After you have removed all the beads, it is crucial to determine the width, the height, and the thickness of the existing unit. The measurement data can then be used to precisely design the replacement unit you want for your home. Additionally, it will also provide a guide for ensuring the new unit fits in the frame. It is important to make sure that the window is properly fitted since a mismatch could not only require the whole unit to be disassembled and reassembled, but it will also reduce the performance of the unit. This is particularly relevant in Australia where homes are often exposed to extreme weather conditions.

Preparing the Frame

Whether you are replacing a fixed window, or a sliding one with a fixed or opening sash, be sure that the new window is the right size. UPVC frames have very little space for movement, and a sealed double glazing unit that is just a few millimeters larger is likely to not fit. 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 the replacement and are confident that it is correctly fitted take the glass out of its frame. Wear protective equipment, like gloves and work in a place that is well-lit to prevent injury from glass shards. Utilize a putty knife to remove the glaze stripes or beads that hold the glass into the frame, and remove them from the perimeter of the pane. It is important to avoid slipping the glass or straining the frame.

Check that the frame can open and close easily when the new double-glazing unit sealed is installed. You can adjust the fit as needed by adding or removing packing. If the frame is for sliding glass doors you may need to add packers to the top of the hinge as well as the opposite corner to avoid the sash from being caught when it opens.

Then clean the frame. Remove any old glazing tape or sealant, if necessary. Assess any damage, and make small repairs, if needed, by using wood filler or sanding. The frame will be rejuvenated by a final cleaning and inspection so that it can withstand Australia's harsh weather for years.

Lifting the New Unit

Over time double glazed sealed units (or a 'sealed unit' as it is often known) can develop problems like moisture between panes or misting. When this happens the effectiveness of your window is diminished, letting cold air in and allowing warm air from your heating system to escape, leading to the cost of energy and decrease in comfort.

This type of seal failure generally occurs due to age general wear and tear or harsh chemical cleaners that deteriorate the sealing material. Sometimes however, the reason could be due to the expanding and shrinking of the glass due to temperature changes and seasonal changes.

Once the frame is cleaned and ready then you can move the new unit up into its place. This is a thrilling moment as you've improved the heating of your home in the winter months and cooling in the summer months, while also reducing your energy bill.

Before securing the unit it is crucial to ensure that the new unit fits into the frame. This is crucial to ensure that the frame isn't damaged and the glass.

If your windows use glazing tape or sealant it's time to apply a bead around the edges of the glass and frame creating a solid barrier against air and moisture infiltration. Tighten the sealant with care, ensuring it's secure but not too tight to cause stress on the frame or glass. Enjoy your newly installed double-glazed windows and give yourself a pat on the back for a job well done!

Securing the Unit

With the new unit set comfortably in the frame and a fresh layer of sealant covering its entire perimeter, this is the moment to mark the end of your project. The unit is now secure to withstand Australia's varied weather conditions, a guarantee for warm temperatures in winter and cool temperatures in summer. It's the moment when you can confirm the accuracy of your measurement and removal, a confirmation of a unit crafted to exact measurements.

No matter if a window has glass beads or screws, fixing the new unit to the frame is an art of balancing tight enough to hold it in place and soft enough to not stress the glass. If the frame is too loose, the window may lose its airtight seal. If it's too tight, it could damage the frame or warp the material. Each screw must be able to locate its original location and rotate just enough to ensure that the unit is held securely without applying undue pressure.

This is the final step in a transformative project that improves a home's comfort, energy efficiency, and appearance. With the new double-glazed unit firmly seated in the frame and securing a fresh bead of sealant around the perimeter, this is the moment that signifies the completion of your project.

The cavity between the glass panes is filled either with either argon or desiccant. In contrast to air, argon has significantly lower thermal conductivity and reduces heat transfer through glass. Additionally, a desiccant adsorbs moisture from the air, to prevent condensation and mould from forming in the frame. The spacer bar, typically made of aluminium, is an essential component of the insulation system. The aluminium prevents the transfer of heat, but also keeps the edge of the insulated glass warm to prevent condensation.

Checking Your Work

It is essential to leave the silicone sealant to set once you have installed the new device. It will take at least four hours for the silicone sealant to attain its maximum strength and form an impenetrable wall. While you sit, take the time to visually evaluate your work and see if you are able to spot any gaps or other issues that could compromise the performance or appearance of the unit.

It's also a good time to examine the seals and frame to see if there are any signs of damage. You can also determine if the whole window needs to be replaced. A faulty seal will have a significant impact on your home's energy efficiency, causing drafts or cold spots. It also allows ultraviolet rays into the house which can cause furniture to fade, and curtains and carpets to wear faster.


If you're experiencing any of these problems the double glazing might require replacement. Making it a priority to replace it immediately will reduce your energy bills and provide a more comfortable, relaxed home environment.

It is a complex and labor-intensive process that requires the correct equipment, precise measurement and careful preparation. portsmouth Replacement uPVC Double Glazed Window And Door Seals is not a DIY project and should be handled by a professional with expertise working with uPVC Windows and Doors. They can ensure that the replacement unit is installed correctly to shield your home from the elements. Their experience and expertise will ensure that your double-glazed unit is quiet and effective combination of warmth in the winter and coolness in summer, securing your home from weather.

Website: https://www.repairmywindowsanddoors.co.uk/portsmouth-window-and-door-seals-and-gaskets-replacement-near-me/