Short Answer
In many period and listed properties, restoring original sash windows is often preferable to replacement. Restoration is often more environmentally friendly, helps preserve historic character while improving performance, comfort and energy efficiency through careful repairs, draught proofing and secondary glazing. It can also often be more cost effective than full replacement.
Why Are Original Sash Windows Worth Preserving?
Traditional sash windows are often made from high-quality timber that can last for generations when properly maintained.
Original windows also contribute significantly to:
- Architectural character
- Heritage value
- Conservation compliance
- Property appearance
Replacing them can alter the proportions and detailing of a period property. This work can all form part of reducing condensation in period homes, see our guide for further info.
What Is Sash Window Restoration?
Sash window restoration involves repairing and refurbishing improving existing windows to their original beauty and functionality, rather than replacing them entirely.
Typical work may include:
- Timber repairs
- Rebalancing sashes
- Replacing cords and weights
- Draught proofing
- Improving operation
- Secondary glazing installation
The goal is to preserve the original window while improving comfort and usability.
When Is Replacement Necessary?
Replacement may occasionally be required where windows are:
- Structurally beyond repair
- Missing entirely
- Severely altered previously
However, at Mitchell & Dickinson we have found that many windows that appear beyond repair can often be restored successfully by our specialist craftsmen.
Is Restoration More Energy Efficient?
Restored sash windows combined with draught proofing and secondary glazing can achieve excellent thermal performance and is more sustainable that replacement.
This approach can:
- Reduce draughts
- Improve comfort
- Lower heat loss
- Preserve original features
For listed buildings, this is often a more suitable solution than replacement double glazing which could require listed building consent.
Restoration vs Replacement: Key Differences
| Feature | Restoration | Replacement |
| Preserves original windows | Yes | No |
| Suitable for listed buildings | Often | Sometimes restricted |
| Maintains character | Yes | Varies |
| Disruption | Lower | Higher |
Is Sash Window Restoration Worth It?
For many homeowners, yes.
Restoration can:
- Protect heritage value
- Improve comfort
- Extend window lifespan
- Maintain period character
It is especially valuable in Georgian, Victorian and Edwardian homes.
Specialist Restoration for Period Homes
Mitchell & Dickinson’s sash window restoration specialists are the experts in restoring original sash windows in period and listed buildings.
Our approach focuses on:
- Preserving original fabric
- Improving performance
- Enhancing comfort
- Respecting heritage features
FAQs
Can old sash windows be restored?
Yes, many original sash windows can be restored even when they appear badly damaged.
Is restoration cheaper than replacement?
In many cases, restoration can be more cost-effective than full replacement.
Do restored sash windows still get draughts?
Professional draught proofing can significantly reduce draughts and improve comfort. As part of our restoration service, Mitchell & Dickinson can install discreet draught proofing and CosyGlazing secondary glazing.
