Sash and Case Windows
Sash and Case Windows
At GR Window and Door Specialists Ltd, we specialize in the complete restoration, repair, and draught-proofing of existing timber box sash and case windows. Our expert team is dedicated to preserving the charm and functionality of these timeless features while significantly improving their energy efficiency and overall performance.
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Draught-Proofing and Heat Loss Reduction: Properly installed and restored sash and case windows can achieve up to a 90% reduction in heat loss, helping to maintain a comfortable indoor environment and lower energy bills. Our draught-proofing solutions eliminate gaps that allow cold air in and warm air out, ensuring your home stays cozy while retaining the traditional beauty of your windows.
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Skilled Restoration Work: Restoring sash and case windows is a highly skilled craft that requires precision and expertise. We take pride in delivering the highest quality service, ensuring every detail of your windows is carefully attended to. From repairing minor imperfections to full-scale restorations, our team ensures your windows are restored to their original condition or better.
Commitment to Quality: At GR Window and Door Specialists Ltd, we use only the best materials and techniques to ensure lasting results. Our skilled tradesmen combine traditional craftsmanship with modern advancements, restoring your windows to their former glory while enhancing their durability and functionality.
Whether your windows require minor repairs, comprehensive restoration, or effective draught-proofing, we are committed to providing a tailored service that meets your needs. With our expertise, you can enjoy the timeless beauty of your sash and case windows while benefiting from improved energy efficiency and a more comfortable home.

Sash and Case Draught Proofing Process
At GR Window and Door Specialists Ltd, we take pride in our meticulous approach to sash and case window restoration. Our process ensures that every window is carefully restored to its original functionality while incorporating modern draught-proofing techniques to enhance energy efficiency and performance. Here’s a step-by-step overview of our detailed restoration process:
Careful Removal of Sashes
Both sashes are expertly removed from the sash box to allow for a thorough inspection and restoration. This step is performed with precision to prevent any damage to the existing frame or glazing.
Fitting New Parting Beads
New parting beads are installed along both sides of the sash box. These beads are essential for providing smooth operation and housing the draught-proofing strips. They are crafted from durable materials to ensure longevity and a perfect fit.
Routing for Draught Strips
Each sash is carefully routered to create a channel for the new draught-proofing strips. This step ensures that the draught-proofing elements integrate seamlessly into the sashes without altering the traditional appearance of the window.
Installation of Carrier and Brush Strip
After the routing process, we fit a high-quality carrier and brush strip into the newly created channels. This combination forms an effective barrier against draughts and minimizes external noise, improving both energy efficiency and comfort.
Re-Cording and Balancing of Sashes
The sashes are re-corded with strong, durable cords, ensuring smooth and reliable operation. They are carefully balanced to guarantee that they move effortlessly and stay in place when opened or closed.
Reinstallation into the Existing Frame
Once the sashes are restored, re-corded, and draught-proofed, they are refitted into the existing frame. This process is done with precision to preserve the window's original look while enhancing functionality.
Fitting New Baton Rods
New baton rods are installed, complete with draught strip inserts. These rods not only contribute to the window's draught-proofing but also provide additional stability and a neat, professional finish.
This comprehensive process ensures that your sash and case windows are restored to their full potential, combining traditional craftsmanship with modern efficiency. The result is a beautifully functioning window that retains its original charm while offering improved insulation, reduced noise, and a more comfortable living environment.

Sash and Case Draught Restoration Process
- Replace any broken glass. Single glazed or double-glazed units.
- Replace all rotten timber sections.
- Replacing sashes.
- Replacing windowsills.
- Re-balancing and re-weighting windows.
- Restoring the original sash box.
- Repointing the original external sand mastic.
- Replacing ironmongery - pull rings, centre catches, safety locks.
- Fitting simplex systems to open bottom sash for cleaning purposes if property is off the ground floor.

