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Replacement Double Glazed Units

Over time, double glazed units (or sealed units as they are often called) will break down. This typically happens when the insulating properties of the inert gas that is between the glass panes degrade.

It is essential to replace a damaged window to ensure that your home is fully energy efficient and insulated. The task is relatively simple and easy.

Installation

If the window was fitted correctly, the new unit will fit snugly and securely inside the frame. If the new glazed panel is not the same size as the old one you may need to adjust the 'packers' (usually blue or red plastic slips) inside the frame. Ask your installer for instructions of the manufacturer if you're not sure.

A good replacement double glazed sealed unit will be manufactured to the highest standards and should fit in your frame with a minimum of hassle. But, even a tiny mistake can have an enormous impact on the performance of your window and should therefore be checked attentively.

Modern double-glazed units are a great energy efficient addition to any home. They utilize an argon gas layer between the panes to provide insulation and thus reduce the amount of heat that could escape your property during cold weather.

However, sometimes these units may fail or have 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. Moisture in your window cavity is not only unsightly, but it also reduces the efficiency of the glass unit.

Condensation can be caused by a range of factors and the best method to determine the cause is to look for a foggy or misty look between the windows. This is a sign that the seal between two panes has broken and moisture is leaking into your living space.

The first step to take is to remove the glazing beads from around the edges of your window. This can be a little complicated and messy, but it's worth the effort because it allows you to access the wedge gasket that holds your glass in place. You'll need to take off the beads with care to ensure that they don't break, and it's usually an excellent idea to seek assistance at this stage. After the beads have been removed, allow the sealed unit to drop slightly from the frame. With an assistant, hold it in position while you precisely measure the height, width and the thickness. This is crucial because it determines the dimensions of the wedge gasket that must be cut to accommodate the new double glazed sealed unit.

Checking

Double glazing units, or sealed units as they are commonly called, can break down over time. This is usually due to a leak in the seal that lets condensation and moisture into the space between the panes. This affects the ability of the window to keep cold air out, warm air produced by the heating system in, and solar gain from the sun's rays inside.

A faulty seal can also result in draughts being felt within the home. Double-glazed windows must be inspected often for signs of failure. A misting or a haze of moisture in the glass is an indication that the seal has failed and a replacement unit is required.

If you must replace a sealed unit it is vital that the new 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 can alter the performance of windows. To ensure that you're ordering the right size, it's best how to replace rubber seal on upvc door consult a professional or the manufacturer's guide.

With the help of a person who holds the new piece, gently slide it into place in the frame. It is essential that you do this in a secure spot since the glass is fragile and could break or fall out. Once the sealed unit has been secured in the frame, reattach any packers on the bottom of frame and then replace the glazing beads back into their original position. After you've completed this, give the window an inspection thoroughly to ensure there aren't any gaps and that it is not misaligned.

You may have to add a small amount of sealant around the edges of the frame to prevent it from moving. Reviewing the thickness of the unit is also a good thing to do. This is essential since double-glazed units come in different thicknesses, and using the wrong thickness can affect the u-value of your home's insulation.

Sealing

Double glazing can increase the efficiency of your home, and improve sound insulation. However, over time the glass's seals may wear down resulting in misted windows and a reduction in performance. In these cases replacement window gaskets is needed. It is a good idea to employ a double glazing professional who will help you select the best glass products, take precise measurements and ensure proper installation.

When replacing a sealed unit the first step is clean the frame. You can make use of an old paint brush (4 inch is ideal) to sweep the frame out, removing dust and cobwebs which accumulate in the frame over time. When the frame is clean, it's a good idea give the new seals a thorough clean too. The easiest way to do this is to remove the Wedge gaskets by putting your fingers on the edge and then pulling it out until you reach the point that it overlaps with the friction joint. Note down the length of time you'll need the new seals. This will assist when cutting them.

Once the gaskets are clean and the frame cleaned up it's time to put in the sealed unit. To get the best results when doing this it's a good idea to cut off the beads (the UPVC frame clips that support the glass) and then measure them. This will ensure that the seal is built according to the correct dimensions and won't leave any gaps around it.

After the beads are in their place, you can insert the top bead, and then move on to the remaining three. Be careful not to touch your sealed units for a few minutes following the sealing process as the silicone needs time to set and harden before you can handle it again. I typically wait 6 hours before handling it, but the sealant's setting time can vary.

Finalization

Once the new double glazed unit is secure within its frame, it's time to seal it and then finish. This step is not just an aesthetic finish to the project, but also a statement that your home is prepared to withstand the elements now that its new secured guardian is in place.

The first step is cleaning the frame and taking out any glazing beads strips or other materials used to hold the old glass. The frame is then scrubbed clean of dirt, old sealant and glazing tape. This process also renews the aluminium Window seal replacement or timber frame. This is also the time to make any minor repairs using wood filler and sanding, if needed. The most serious damage should be taken to a professional for repair window seals near me.

The tubes that are used as spacers are filled with desiccants to absorb any moisture that might be trapped in-between the two glass panes during the process of manufacturing or after time. This is a common practice for warm edge sealed unit. Thermoseal Group stocks desiccants as well as manual and automatic desiccant dispensing machines.

After the spacers are filled, the glass is sealed with a high-performance silicone that is designed to withstand Australia's harsh environment. This sealant creates an airtight seal that is extremely flexible and durable and can expand and contract without breaking. It is crucial to choose the correct thickness as any gaps could impact thermal performance. If you're unsure of the right thickness to use you should consult an expert or a manufacturer's guide.

The last step is to apply secondary sealant, which is typically polyisobutylene (PIB) or a similar product. It's applied to the edges of the frame's exterior and creates a secondary seal that's capable of repelling moisture and stop air penetration, helping to increase the efficiency of energy.

The frame is then adorned with an aluminum cladding. This is a protective coating that can withstand the elements, and keep your frame looking like new for a long time to be. It is a wise investment for the long-term integrity and aesthetics of your frames, especially if you have federation or period style homes with timber frames that are susceptible to get rotted.