Expert Sash Window Restoration Services for a Timeless Look
At Window Installation Services, we specialize in sash window restoration services across the UK, helping property owners reclaim the charm and functionality of their historic windows. Your sash windows are not just a feature of your home—they are a testament to its history and character. Our goal is to preserve this heritage while addressing issues like draughts, rot, or stuck sashes with meticulous attention to detail.


Why Restoring Your Sash Windows Matters
Your sash windows are not just old fixtures—they are part of your home’s architectural identity. Over time, they can develop issues like rotting frames, broken glass, and jamming mechanisms, which compromise functionality and energy efficiency.
- Challenge: Heat escaping through draughty windows can increase heating bills by up to 30%.
- Solution: Our draught-proofing system seals gaps while maintaining the traditional appearance of your windows, reducing heat loss significantly.
Another common concern is rotting timber in frames. Many homeowners feel compelled to replace the windows entirely, not knowing that Accoya timber splicing and epoxy resin consolidation can save even severely damaged sashes at a fraction of the cost.
How We Bring Your Sash Windows Back to Life
We restore your sash windows with a meticulous process that blends time-honored methods and advanced materials to preserve their charm and improve performance.
Detailed Inspection
Before any work begins, we conduct a thorough survey to assess:
- Frame integrity, looking for signs of rot or splits.
- Glass condition, identifying cracks or fogging in double-glazed units.
- Mechanism functionality, such as faulty pulley systems or broken sash cords.
We’ll explain the exact state of your windows and recommend the necessary repairs.


Repairs Designed for Your Needs
Our repairs are rooted in traditional techniques, honed for the specific challenges of the UK’s historic buildings. Here’s how we solve common problems:
- Rotting Timber: We use timber scarfing to replace only the damaged sections, maintaining the structural and aesthetic integrity of your windows.
- Sticking or Misaligned Sashes: We carefully plane swollen areas and realign sashes to ensure smooth operation.
- Broken Glass: We replace panes with restoration glass that mimics the look of antique glazing, ensuring compliance with listed building standards.
Draught-Proofing and Energy Efficiency
Many clients face draughts that make rooms feel colder, especially in winter. With custom-fitted weather stripping, we eliminate gaps while keeping the aesthetics intact. This service can lower energy costs and create a more comfortable indoor environment.
Our Solutions to Common Challenges
Our solutions address the root causes of sash window issues, combining traditional craftsmanship with modern techniques to ensure durability and functionality.
Rot and Deterioration
Problem: The lower sections of your sash windows are soft to the touch, with peeling paint revealing rotten wood.
Our Approach: Instead of replacing the entire frame, we employ rot-repair fillers and carefully splice in treated timber. This approach can extend the life of your frames by decades.


Draughts and Heat Loss
Problem: Rooms near your windows always feel colder, and you’re noticing a spike in energy costs.
Our Approach: After installing draught seals and performing minor adjustments, we’ve seen energy savings of 20-25% in similar cases.
Sticking Sashes
Problem: Your top sash refuses to budge, or both sashes stick in the middle.
Our Approach: We dismantle the sashes, strip excess paint, and recalibrate the weights to ensure smooth operation.
The Real Value of Restoration
When you choose sash window restoration services, you’re making an investment in quality and sustainability. Unlike replacement windows, our methods preserve the unique craftsmanship of your original sashes while addressing modern demands for energy efficiency.
Imagine hosting guests in a living room that’s both warmer and quieter, thanks to restored and draught-proofed windows. You’ll not only save money on energy but also maintain the authenticity of your home.
Cases
- Listed Building Compliance: A homeowner in Bath faced restrictions on replacing sash windows in their Grade II-listed property. We restored the original frames and installed hand-blown glass, securing full council approval.
- Severe Rot Repairs: In a 19th-century terraced home in York, we replaced 40% of a rotting sill using timber scarfing, saving the client £3,000 compared to replacement.
- Energy Efficiency Upgrade: A Victorian property in London saw a 25% reduction in heating bills after we draught-proofed their windows and replaced old single-glazing with restoration-grade double-glazing.


Why Clients Trust Us
Some of the reasons the clients trust us are:
- Attention to Detail: Every restoration project begins with a tailored plan designed to address the unique quirks of your windows.
- UK Expertise: We understand the challenges of maintaining period properties under the often damp and changing conditions of the UK climate.
- Sustainable Practices: By restoring rather than replacing, we reduce waste and preserve the craftsmanship of your home’s original features.
Expert Care for Your Sash Windows!
We can Restore your sash windows to timeless beauty! Trust us for expert care and lasting results. Get your free quote today!
Frequently Asked Questions
Properly restored sash windows, with routine maintenance, can last another 50–100 years. Materials like Accoya wood ensure resilience against rot and weathering.
No, our draught-proofing strips are discreetly installed in the sash channels, preserving the original appearance.
We use high-durability waxed cotton cords and recalibrate the counterweights to maintain balance. This ensures effortless movement.
Our assessment covers frame condition, glass health, and mechanism functionality. We’ll also inspect for damp penetration and advise on timber treatments if needed.