Sealed Unit Replacement Specialists in Leicestershire & The Midlands
Professional replacement of double and triple glazed units into existing frames.
- Local independent glazing specialists
- Double & triple glazed units supplied & fitted
- No unnecessary window replacement
What Is a Sealed Unit?
A sealed unit — also known as a double glazed unit (DGU) or insulated glass unit (IGU) —
consists of:
- Two or three panes of glass
- A spacer bar separating the panes
- A sealed perimeter
- An insulating gas-filled cavity
Over time, the perimeter seal can fail, allowing moisture inside and reducing insulation
performance.
When this happens, the unit needs replacing.
Not the whole window
When this happens, the unit needs replacing.
Not the whole window
Signs Your Sealed Unit Has Failed
You may need sealed unit replacement if:
- There is condensation between the panes
- The glass appears misted or fogged
- The unit has cracked or shattered
- The glass no longer insulates properly
- There is visible moisture inside the cavity
In most cases, the window frame remains structurally sound.
Replacing the sealed unit is usually the most cost-effective solution.
Replacing the sealed unit is usually the most cost-effective solution.
Professional Sealed Unit Replacement
Before – Failed sealed unit with internal condensation
After – New double glazed unit professionally installed
Replacing the insulated glass unit restores clarity and thermal performance.
Double & Triple Glazed Units Supplied & Installed
We supply and install:
Double Glazed Units
Standard energy efficient replacement units.
Triple Glazed Units
Improved thermal performance where frame depth allows.
Toughened Safety Glass Units
Required in critical locations such as doors and low-level glazing.
Laminated Security Glass Units
Enhanced protection and security.
Acoustic Glass Units
Reduce external noise levels.
Solar Control & Energy Efficient Units
Low-E coatings, argon gas filled and warm edge spacer technology.
All units are made to measure to suit your existing frame.
Sealed Unit Replacement vs Full Window Replacement
Full window replacement can be significantly more expensive and disruptive.
If your frames are:
If your frames are:
- Structurally sound
- Not warped or damaged
- Operating correctly
Replacing the insulated glass unit is often the smarter choice.
At RUK Glazing, we specialise purely in sealed unit replacement — not full window sales.
We focus on what you actually need.
At RUK Glazing, we specialise purely in sealed unit replacement — not full window sales.
We focus on what you actually need.
Simple & Professional
Survey & Measurement
We measure accurately to ensure a perfect fit.
Professional Installation
We replace the failed unit quickly and cleanly.
How Much Does Sealed Unit Replacement Cost?
Costs depend on:
- Unit size
- Double or triple glazing
- Glass specification
- Safety requirements
Because only the glass unit is replaced, sealed unit replacement is typically far more
affordable than full window replacement.
For a tailored quote:
Reliable Sealed Unit Replacement for Landlords & Commercial Properties
We regularly work with:
- Landlords
- Letting agents
- Property managers
- Offices
- Schools
Fast turnaround and professional service across Leicestershire and the Midlands.
Sealed Unit Replacement Across:
- Leicester
- Wigston
- Oadby
- Loughborough
- Hinckley
- Market Harborough
And surrounding Midlands areas.