Replacement Double Glazing
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Replacement Double Glazing
Replacement double glazing can refer to replacing the entire window (frame and glass unit) or just the glass unit itself (the sealed unit).
Here is a breakdown of the key considerations:
1. Replacement Options
2. Common Reasons for Replacement
3. Cost Considerations (UK Averages are provided in the search, but always get a specific quote)
The price will vary widely based on:
4. Finding a Professional
It's highly recommended to use an approved or certified installer. In the UK, look for companies registered with schemes like:
Here is a breakdown of the key considerations:
1. Replacement Options
- Replacing the Glass Unit Only (Sealed Unit):
- When to choose this: This is the most cost-effective option if your window frames are in good condition and you only have an issue with the glass (e.g., condensation/misting between the panes, a cracked pane).
- Process: A glazier will measure the existing sealed unit, order a replacement (which may have updated thermal properties), remove the glazing beads from the frame, swap out the old unit, and secure the new one with the beads and gaskets.
- Cost: Significantly lower than replacing the whole window.
- When to choose this: This is the most cost-effective option if your window frames are in good condition and you only have an issue with the glass (e.g., condensation/misting between the panes, a cracked pane).
- Replacing the Entire Window (Frame and Glass Unit):
- When to choose this: If your frames are old, damaged, warped, or thermally inefficient. This is also the choice if you want a complete change of style, material (e.g., from uPVC to timber or aluminium), or a different opening mechanism.
- Process: The old frame and glass are removed, and a brand-new complete window is installed in the existing opening. This can sometimes involve minor redecoration around the window.
- Cost: Higher initial cost, but offers maximum improvement in energy efficiency, security, and aesthetics.
- When to choose this: If your frames are old, damaged, warped, or thermally inefficient. This is also the choice if you want a complete change of style, material (e.g., from uPVC to timber or aluminium), or a different opening mechanism.
2. Common Reasons for Replacement
- Misted or "Blown" Units: Condensation appears between the two panes of glass, indicating the seal has failed and moisture has entered the air gap. This significantly reduces the window's thermal efficiency.
- Cracked or Smashed Glass: For safety and security.
- Poor Thermal Performance: Replacing old double glazing with modern units (especially Low-E glass) can improve energy efficiency and reduce heating bills.
- Worn or Damaged Frames: Frames that are difficult to open/close, have poor sealing, or are cosmetically damaged.
- Security or Noise Concerns: Upgrading to tougher glass (like laminated or toughened) or a thicker glass unit for better sound insulation.
3. Cost Considerations (UK Averages are provided in the search, but always get a specific quote)
The price will vary widely based on:
- What you are replacing: Unit only is cheapest; a full window is more expensive.
- Window Style: Casement windows are typically the most affordable, followed by sliding, tilt-and-turn, and then more complex styles like sash, bay, or bow windows.
- Frame Material: uPVC is generally the most economical, followed by aluminium, and then timber.
- Glass Specification: Upgrading to features like Low-E glass, argon gas-filled cavities, or triple glazing will increase the cost.
- Location: Prices can vary regionally.
4. Finding a Professional
It's highly recommended to use an approved or certified installer. In the UK, look for companies registered with schemes like:
- FENSA (Fenestration Self-Assessment Scheme)
- CERTASS
Double Glazing Repairs
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