Mon – Fri: 7:00 am – 5:00 pm
Sat: 8:00 am – 12:00 pm
If your windows have condensation between the glass panes, appear misted or cloudy, or the glass has become cracked, broken, or draughty, you may not need to replace the entire window frame.
In most cases, these problems are caused by a failed sealed glass unit, commonly known as a blown double or triple glazed unit.
The good news is that the frame itself is usually still perfectly usable.
At Showcase Plastics, we specialise in replacement double / triple glazed units and sealed unit glass replacement in Maldon and across Essex, offering a fast, affordable alternative to full window replacement.
Double glazed windows are made using a sealed glass unit, consisting of two or more panes of glass separated by a spacer bar and sealed to create an insulated cavity.
Over time, this seal can fail due to:
• age and weather exposure
• temperature fluctuations
• poor installation or wear
• damaged seals
• frame movement
When the seal fails, moisture enters the cavity, causing condensation between the panes which leads to the familiar misted or foggy window appearance.
This is commonly referred to as:
blown double glazing
misted double glazing
failed sealed units
cloudy window glass
The good news is that this problem can almost always be solved by replacing the glass unit only.
Replacing the double glazed glass unit only is typically:
✔ far cheaper than installing new windows
✔ faster and less disruptive
✔ more environmentally friendly
✔ effective at restoring insulation and clarity
Instead of replacing the entire window frame, we simply measure and supply a new sealed glass unit that fits directly into your existing frame.
This restores the window to like-new performance.
New sealed glass units offer major improvements compared to older glazing.
Upgrading your glass can provide:
Modern energy efficient double glazing helps retain heat in winter and reduce heat gain in summer.
Properly sealed units prevent internal condensation between the panes.
Upgraded glass options can help reduce outside noise from roads, neighbours, or busy areas.
Replacing the sealed unit removes the cloudy, misted appearance and restores clear glass.
Improved insulation can contribute to better energy efficiency in your home.
At Showcase Plastics we supply replacement sealed units for a wide range of window and door systems, including:
• uPVC windows
• aluminium windows
• timber window frames
• patio doors
• French doors
• conservatory windows
• residential and commercial glazing
We can supply sealed units cut to size for both homeowners and trade installers or supply and fit whichever suits your best.
When replacing your double glazed unit, you can choose from several upgraded glass options including:
• Low-E energy efficient glass
• Toughened safety glass
• Laminated security glass
• Solar control glass
• Acoustic glass for noise reduction
• Obscure / patterned privacy glass
Our team can advise on the best sealed unit specification for your window.
You may need a replacement double glazed unit if you notice:
• condensation trapped between glass panes
• cloudy or misted windows
• visible cracks in the glass
• draughts around the glazing
• water droplets inside the sealed unit
• reduced insulation performance
• noisy windows letting in outside sound
These are all classic signs of blown double glazing.
Showcase Plastics provides replacement double / triple glazed units in Maldon, Heybridge and across Essex, helping homeowners and tradespeople restore their windows quickly and affordably.
Our service is ideal for:
• homeowners fixing misted windows
• landlords maintaining rental properties
• builders and property maintenance companies
• window installers needing sealed units cut to size
We aim to make the process simple, fast and cost-effective.
✔ Local Essex supplier
✔ Fast turnaround on sealed units
✔ Expert advice on glazing options
✔ Competitive pricing
✔ Supply for both DIY customers and trade professionals
With many years of experience in plastic building supplies and glazing solutions, we are proud to help customers across the Maldon area solve their window problems efficiently.
If you have misted, cloudy, blown or broken double glazing, replacing the sealed unit could be the quickest and most cost-effective solution.
Our team will be happy to help with measurements, glass specification and pricing.
📞 Call us: 01621 842 000
📲 WhatsApp: +44 7949 280 147
📍 Visit us:
Showcase Plastics
Unit 6, Heybridge Industrial Estate
Maldon, Essex CM9 4XL
👐🏻 Opening Hours:
Mon – Fri: 7:00am – 5:00pm
Sat: 8:00am – 12:00pm
📥 Email: sales@showcaseplastics.co.uk
Still got a question – here are the most common – answered.
Can misted double glazing be repaired?
Yes. In most cases the sealed glass unit can be replaced without replacing the entire window frame.
What causes condensation inside double glazing?
Condensation between panes occurs when the seal of a double glazed unit fails, allowing moisture to enter.
Is it cheaper to replace glass or the whole window?
Replacing the sealed glass unit is usually far cheaper than installing a brand-new window.
How long do sealed units last?
Most double glazed units last 10–20 years before the seals may eventually fail.
Do you offer supply only or supply and fit?
Whichever you prefer. We can quote a price for the goods to be collected or delivered as supply only options, or supply and fit them for you for an all in one – no stress solution.