Why You Should Consider Replacing Your Double-Glazed Glass
Have you noticed fog, mist, or condensation inside your double-glazed windows? Or maybe a draught is sneaking in more than you’d like? These could be signs that your glass unit has failed — and a timely glass replacement might just save you money, comfort, and energy long term.
Signs It’s Time to Replace Your Glass
Here’s how to know if your double-glazed glass may need replacing:
- Misted or foggy glass – Indicates moisture between the panes due to a failed seal.
- Visible water or condensation trapped inside the window unit.
- Cracked or chipped glass – Even tiny cracks can reduce insulation and security.
- Draughts or cold spots near the window area.
- Reduced energy efficiency – You might notice higher heating bills.
Why Glass Fails in Double Glazing
Glass units fail when the seal around the panes breaks down, letting moisture seep in. This can be caused by:
- Age – Seals naturally degrade over time (especially after 10–15 years).
- Weather – Repeated expansion and contraction from temperature changes.
- Poor installation – If the original unit wasn’t sealed correctly.
- Physical stress – From movement in the frame or accidental impact.
Repair or Replace?
It’s a common question and an important one. In many cases, replacing just the glass unit (rather than the entire window frame) is all that’s needed.
Glass replacement:
- More affordable than full replacement
- Quick and non-invasive – no redecorating afterwards
- Restores insulation and clarity
Full window replacement:
- Ideal if the frame is damaged or worn out
- A fresh start with improved performance and style
At Strata Windows, we always carry out a full, honest assessment first. We’ll only recommend full replacement if it’s genuinely the best option for you and your home.
How Much Does Replacing Glass Cost?
Costs can vary depending on window size and style. On average, replacing a blown double-glazed unit costs between £80 – £150 per window including fitting. It’s a smart investment that often pays for itself in energy savings.
How Long Does It Take?
Most glass-only replacements are completed within a few hours, with no mess or disruption. Our team measures, orders a custom-fit glass unit, and installs it carefully – leaving your home warmer, clearer, and more secure.
What Type of Glass Is Best?
Replacement units can use standard glass or upgraded options for better performance. Popular choices include:
- Low-E (low-emissivity) glass – Reflects heat back into your home for better efficiency.
- Toughened safety glass – Stronger and safer, especially for doors and low windows.
- Acoustic glass – Reduces outside noise – ideal for busy roads.
We’ll help you choose the right option for your home and budget.
Check It Yourself First
If you’re unsure whether it’s condensation or just dirt, try these simple checks:
- Clean both sides of the glass thoroughly. If mist remains inside, it’s a blown unit.
- Run your hand around the edge – feel for draughts or cool air.
- Compare to other windows in your home – one misty unit doesn’t mean they all need replacing.
Need Friendly Advice?
Whether your windows are misted, draughty, or just not performing like they used to, the Strata Windows team is here to help. We’ll give you honest advice, clear pricing, and high-quality repairs or replacements with no pressure.
Click here to request a free quote and make your windows clear, warm, and efficient again.