Sash Window Restoration

Unveiling Answers to Common Queries About Sash Window Restoration

Sash windows, with their timeless elegance and historical charm, are a distinctive feature of many homes. However, over time, these windows may require restoration to maintain their functionality and aesthetic appeal. If you’re contemplating sash window restoration, you likely have a myriad of questions. This article seeks to address common queries surrounding the restoration of sash windows, offering insights into the process and its benefits.

  1. Why Restore Instead of Replace?
    • Preserving Heritage: Sash windows are often integral to a building’s character and historical significance. Restoration allows homeowners to retain the authenticity and charm of their property.
    • Cost-Effective: Restoration is typically more cost-effective than complete window replacement. It addresses specific issues, such as decay or rattling, without the need for an entire window overhaul.
  2. What Does the Restoration Process Entail?
    • Assessment: A thorough inspection is conducted to identify issues such as rot, decay, or damage to the frame and sashes.
    • Repair or Replacement: Damaged components are either repaired or, if beyond repair, replaced with materials that match the original design.
    • Paint Stripping and Repainting: Layers of old paint are stripped, and the windows are repainted to protect against weathering and enhance their appearance.
  3. Can Modern Materials be Used in Restoration?
    • Balancing Tradition and Functionality: While traditional materials are often preferred for maintaining authenticity, some modern materials can be integrated discreetly to enhance durability and energy efficiency without compromising the historical integrity of the windows.
  4. How to Address Draughts and Insulation Concerns?
    • Draught-Proofing: One of the common issues with sash windows is draughts. Draught-proofing measures, such as installing discreet brush strips or weatherproofing seals, can significantly enhance energy efficiency without compromising the window’s appearance.
  5. Is Restoration Suitable for Every Type of Sash Window?
    • Versatility: Restoration is applicable to a wide range of sash window styles, from Victorian to Georgian. However, the extent of restoration needed may vary based on the condition, age, and style of the windows.
  6. How Often Should Sash Windows Be Restored?
    • Regular Maintenance: Routine inspections and maintenance can identify early signs of decay or damage, preventing the need for extensive restoration. However, a comprehensive restoration may be required every 15-20 years, depending on environmental factors and the quality of previous restoration work.
  7. Can Homeowners Perform Sash Window Restoration Themselves?
    • Skill and Expertise: While some aspects of maintenance, such as repainting, can be DIY tasks, a comprehensive restoration requires skill and expertise. Hiring professionals ensures that the restoration is carried out correctly, addressing structural issues and preserving the window’s historical integrity.


Sash window restoration is a meticulous process that demands a delicate balance between preserving heritage and incorporating modern functionality. By understanding the intricacies of the restoration process and addressing common queries, homeowners can make informed decisions to ensure their sash windows stand the test of time, maintaining both their beauty and functionality for generations to come.

ventrolla van

As well as supplying beautiful new timber-framed sash windows, Ventrolla offers a very popular repair and restoration service for a large sash window. Sometimes, customers just don’t want to part with their original sash windows, but they are aware that the windows are not as efficient as modern windows, or maybe in need of repair. That’s when they reach out to Ventrolla for a restoration quote.

Ventrolla is able to offer the survey and quote by phone at no obligation. After this, they will send a technical surveyor to your home to take exact measurements and note which repairs are necessary.

Sash Window Restoration

The repair will include:

  • Removal of the old glass
  • Replacement of any decaying timber. Timber will be kept where possible and where this is not possible, new timber is spliced in place.
  • Filling all cavities. Any remaining cavities are filled with epoxy resin VR90.
  • Replace the mechanism. Cords and service pulleys are replaced to ensure a smooth opening action.
  • Upgrade the seal. The window seal is replaced with Ventrolla’s own Ventrolla Perimeter Sealing System (VPSS) to eliminate draughts and rattles.
  • Replace the glass with efficient double-glazed units.

The whole process is done on-site within a working day by experienced technicians. Replacing and restoring a large sash window will make a huge difference to the look and the thermal efficiency of your home. If you’d like a quote to restore a large sash window in your home or workplace, please contact us.