Replacing Double Glazed Units
Double-glazed units can be replaced to reduce noise and heat loss, as well as lower heating costs. With modern coatings and argon, or krypton gas fills they are also very energy efficient.
The new unit, which was built to exact measurements, is awaiting its time. It requires care and accuracy. This moment stops the world and puts your work into perspective.
Take the old unit out of the way
Removal of the old window is a crucial step to ensure that your new double glazed window is built according to precise measurements. Clean the frame thoroughly of dust, dirt or old sealant, and then repair any damage that may be present. Small repairs can be done with sanding or wood filler however major damage could require professional repairs.
When the glass is removed, it's crucial to measure its width, height and thickness. This can be accomplished by removing the glazing beads that hold the unit. This delicate process requires patience and caution. It is recommended to take your time and always make sure to wear safety gear to safeguard yourself from unexpected shards glass and accidental slips.
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's recommended to get help from someone who can hold the sealed unit as you remove the remaining beads. This is because the unit can easily be thrown out of the frame and smash.
After removing all beads, it is important to determine the width, the height and the thickness of the present unit. The measurement data can then be used to construct an appropriate replacement unit for your home. It can also be used as a guideline to ensure that the new unit is sized properly for the frame. This is important as an inadvertent misfit could result in the need to dismantle and rebuild the entire window, but also affect its efficiency and performance. This is especially important in Australia, where our homes are often subject to extreme weather conditions.
Preparing the Frame
If you are replacing a fixed sliding door window with a fixed sash or opening sash make sure that the new unit is the right dimension. UPVC frames allow little room for movement, and a sealed double glazing unit that is even just a few millimeters larger will not be able to fit. Be sure to measure carefully and consult a professional or manufacturer's guide in order to make sure you get accurate measurements.
Once you have a clear idea of the dimensions of your replacement, and are sure that it's properly fitted, remove the glass from its frame. Wear safety gear, like gloves and work in a place that is well-lit to avoid injuries from glass fragments. Use a putty knife pry the glazing beads or strips that secure the glass in the frame, starting from around the edges of the pane. The glass is fragile and you must be careful to avoid slipping or stressing the frame.
Check that the frame can open and close easily when the new sealed double-glazing unit is installed. It should be a snug fit, but you can alter this if needed by adding or removing packers. For instance, if the frame is a sliding door you may need to add packers at the top of the hinge side and opposite corner to keep the sash from colliding or rattle when it opens.
Then, clean the frame. Remove any old sealant or glazing tape, if necessary. Examine any damage and make minor repairs if necessary by using wood filler or sanding. The frame will be refreshed by a final cleaning and inspection and will be able to stand up to the harsh Australian weather for a long time.
Lifting the New Unit
Over time, double glazed sealed units (or a 'sealed unit' as it is commonly called) may develop issues such as moisture in-between panes and/or misting. This can reduce the efficiency of your windows, allowing cold air to pass through and warm air from your heater to escape, which can result in the cost of energy and discomfort.
replacement double glazing sealed units repairmywindowsanddoors of failure in seals usually occurs due to aging, general wear and tear, or harsh chemical cleaners that deteriorate the sealing material. Sometimes however, the cause can be traced to the shrinking and expanding of the glass as a result of temperature fluctuations and seasonal changes.
After the frame has been cleaned and prepared, you can start lifting the new unit in place. This is a thrilling step since you've just improved the heating of your home in the winter months and cooling in the summer months, while also decreasing your energy bills.
It's important to make sure the new piece fits in the frame prior to locking it in place. A little attention during this process will help prevent any damage to the frame as well as the glass.
If your windows are fitted with glazing tape or sealant it's time to apply a bead around the perimeter of the frame and glass creating a solid barrier against moisture and air infiltration. Tighten the sealant with care making sure it's secure, but not too tight to cause stress on the frame or glass. Enjoy your newly-installed double-glazed windows and reward yourself a pat for an excellent job!
Secure the Unit
With the new unit set perfectly in the frame, and a fresh bead of sealant covering its perimeter it is the moment to mark the end of your project. The unit is now secure to withstand Australia's varied weather conditions, which is a guarantee for warm temperatures in winter and cool temperatures in summer. This is the moment to confirm the precision of your measuring and removal, a confirmation 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 requires an art of balancing tight enough to secure and gentle enough to not stress the glass. If it's too loose, the window could be unable to seal its airtight. 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 rotated just enough to hold the unit securely without putting too much pressure on it.
This is the last step of a project which will improve a home's energy efficiency, comfort, and appearance. The moment you are completed, with the new double-glazed unit safely placed in the frame and a fresh bead around its perimeter.
The insulating cavity between the panes of glass is filled either argon gas or a desiccant. In contrast to air, argon has significantly lower thermal conductivity and reduces heat transfer through glass. Additionally desiccants absorb moisture from the air, preventing condensation and mould from forming within the frame. The spacer bar is made of aluminum and is a vital part of the insulation system. The aluminium prevents the transfer of heat, but also keeps the edge of the insulated glass warm to prevent condensation.
Verifying Your Work
It is crucial to allow the silicone sealant to set once you have put in the new unit. It will take at minimum four hours for the silicone sealant to attain its maximum strength and create an impenetrable wall. While you are waiting, take the time to look over your work and see if you are able to detect any gaps or issues that could compromise the efficiency or appearance of the product.
It is also a great opportunity to check the frame and seals to check for any signs of damage, and determine if the whole window requires replacement. A faulty seal will affect the efficiency of your home's energy use and can cause drafts or cold spots. It also lets ultraviolet rays in to the home, causing furniture to fade, and curtains and carpets to wear more quickly.
If you're experiencing any of these problems it's a sign that your double glazing needs replacement. It will save you money on your energy bills, and create a more relaxed and comfortable home.
Replacing a sealed double glazed unit is a laborious and technical process that requires the proper equipment, careful preparation and precise measurement. It is not an easy DIY task and should be handled by a specialist in uPVC windows and doors who can ensure the correct fitting of the replacement unit to keep your house safe from the elements. Their expertise will ensure that the double-glazed unit you select is quiet and efficient, providing warmth in the winter months and cooling in summer. This will help protect your home from the elements.