What Is Replacement Sealed Double Glazing Units And Why Is Everyone Speakin' About It?

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

Replacing Double Glazed Units

Replacing double glazed units is a home improvement project which can significantly reduce heat loss, enhance the insulation of noise and reduce heating costs. With modern coatings and argon or krypton gas fills, they are very energy efficient.

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

Then, remove the old unit

The removal of the old unit is a crucial step to ensure that the new double-glazed window is constructed to precise measurements. Carefully clean the frame of any dirt, dust or old sealant, and then repair any damage that might be present. Small repairs can be done by using wood filler or sanding but major damage might require professional repairs.

After the glass is removed, it is important to determine its width, height and thickness. This can be done by removing the glazing beads that hold the unit. This is a delicate procedure that requires patience and care. Be patient, and wear safety gear to prevent slips and shards.

The best place to begin is by removing the bottom bead from the glazing strip with a chisel that is sharp or a an abrasive screwdriver with a wide blade. It is best to ask someone to hold the window unit while you remove all the beads. This is because the unit could easily be thrown out of the frame and break.

After removing all the beads, it is important to measure the width, the height, and the thickness of the present unit. The measurements can be used to accurately construct the replacement unit you want for your home. It also serves as a reference to ensure that the new unit is constructed correctly for the frame. It is essential to ensure that the window fits properly because a mismatch will not only need the entire unit to be disassembled and rebuilt, but also impact the performance of the unit. This is particularly relevant in Australia, where our homes are often subject to extreme weather conditions.

Preparing the Frame

Whether you are replacing a fixed or fixed window or a sliding one with a fixed or opening sash, be sure that the new unit is the right size. UPVC frames offer little room for movement and a double glazing unit that's a few millimeters too large is likely to not fit. To ensure that measurements are accurate, measure carefully and consult an expert.

Remove the glass from the frame when you're certain that the replacement is the right size and is properly fitted. Wear safety equipment such as gloves and work in a place that is well-lit to avoid injuries from glass fragments. Utilize a putty knife to pry the glazing strips or beads that secure the glass within the frame, from around the edges of the pane. The glass is fragile and you must be careful to avoid slipping or pulling the frame.

Check that the frame can open and close smoothly when the double-glazing unit that is sealed is installed. You can alter the fit if needed by adding or removing packing. For example, if the frame is a sliding door, you might need to add additional packers at the top of the hinge's side and in the opposite corners to stop the sash from getting caught or shaking when it opens.

Then, clean the frame. Remove any old sealant or glazing tape If needed. Examine any damage and make small repairs using wood filler, or sanding if needed. A final cleaning and inspection will prepare the frame for replacement, ensuring it will last for a long-term protection from Australia's harsh climate.

Lifting the New Unit

Over time, double glazed sealed units (or a  sealed unit as it is more commonly called) may face issues like moisture between panes or misting. If this happens, the efficiency of your window is compromised, letting cold air in and allowing warm air from your heating system out which can result in higher energy bills and a loss of comfort.

This type of failure in seals is usually caused by age, general wear and tears or harsh chemical cleaners that damage the sealing material. Sometimes, the cause is due to the expanding and shrinking of the glass during the changing seasons and temperature changes in the home.

After the frame is cleaned and ready, you can start lifting the frame into place. This is an exciting moment as you've increased the efficiency of your home's heating during the winter months and cooling in the summer months, while also decreasing your energy bills.

It's important to make sure the new unit is properly fitted in the frame prior to locking it to the frame. A little care during this process can prevent damage to the frame as well as the glass.

If you use 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 strong barrier that will prevent air and moisture from getting into the window. Make sure to seal the sealant with care, but not so tightly that it stresses the frame or glass. Enjoy your newly installed double-glazed windows and reward yourself a pat on the back for a job well done!

Securing the Unit

This is the moment when the work is done. The unit will be snugly placed in the frame and a new sealant will cover the perimeter. The unit is finally secured to hold up to Australia's diverse weather and ensure warmth in the winter months and coolness in summer. It's the moment that validates the accuracy of your measurement and removal, which is a proof of a product that has been designed to exact measurements.


If a window is made of glass beads or screws, fastening the new unit to the frame is an intricate balance between being secure enough to secure it and soft enough not to strain the glass. If it's too loose, the unit may lose its airtight seal. If it's too tight, it might cause damage to the frame or weaken the material. Each screw should be put in its original position, and turned to just the right amount to ensure that the unit is held securely without putting too much pressure on it.

This is the final step of a project which will enhance the efficiency of a home's energy and comfort as well as its appearance. The moment you are complete, with the new double-glazed unit securely seated in the frame, and a new bead adorning its perimeter.

The space between the glass panes is filled with the gas argon or with desiccant. In contrast to air, argon has much lower thermal conductivity and reduces heat transfer through the glass. Desiccants also help to absorb moisture from the air, preventing condensation and mould from the frame. The spacer bar, which is typically made of aluminium, is an essential component of the insulation system. The aluminum bar not only blocks heat transfer, but also keeps the edges warm of the insulated window to avoid condensation.

Be sure to check your work

When you've put up the new unit and sprayed an ounce of silicone sealant to the edge, it is important to let it sit and set - don't handle it! It will take at least 4 hours for it to attain its full strength and provide an impervious barrier. While you sit, take the time to visually evaluate your work and see if you are able to identify any gaps or issues that could compromise the effectiveness or appearance of the product.

It's also a good time to inspect the seals and frames to check for any signs of damage, and determine if the entire window should be replaced. A faulty seal can have a huge impact on the efficiency of your home, leading to cold spots and drafts. It also lets ultraviolet rays into the house, causing furniture to fade and curtains and carpets to wear out more quickly.

If you are experiencing any of these issues it is possible that your double glazing require replacement. It will save you money on your energy bills, and also create a more peaceful and comfortable living space.

It is a complicated and labor-intensive process that requires the appropriate equipment, precise measurement and careful preparation. It is not an easy DIY project and should be undertaken by a specialist who has experience with uPVC Windows and Doors.  www.repairmywindowsanddoors.co.uk  can ensure that the replacement unit is installed correctly to shield your home from the elements. Their expertise will ensure that the double-glazed model you choose is both efficient and quiet offering warmth in the winter months and cooling in summer. This will protect your home from the elements.