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About Us

Conservation Joinery was founded by Ray Johnston in 1999, following 9 years’ experience with a national sash window refurbishment company. Ray could see that there was a need in the market to offer a top quality specialist service providing “faithful” period sash window repairs and replacements, backed up by a dedicated workshop providing full support for on-site refurbishments. The quality of workmanship in renovation work and the ability to manufacture bespoke sashes to a high specification, of the standard expected by customers, had been missing, but needed. Conservation Joinery has been fulfilling those needs ever since.

Company Profile

  • Mission
  • Philosophy
  • Services

Deliver repaired or re-created windows in keeping with the property.

We will repair and renovate where possible, but we can make entire new windows if necessary. Attention to detail is crucial in making replacement windows. Is the mould correct for the period? Does the upper sash have horns appropriate to the age of the house, and if so which style? If the building is listed, the original windows have to be faithfully copied, sometimes with hand-made period glass. More than ever we are now being asked to remove ugly, worn, plastic UPVC windows, or a Conservation Officer has ordered the replacement of a property’s inappropriate windows. Whatever the situation, Conservation Joinery can meet the challenge, providing a complete solution, which is sympathetic to the property and of the quality customers want and expect.

Our reputation depends on the quality we deliver.

Our Guarantee stands as it is, but with Ray Johnston’s personal guarantee behind it too that “we will do our best at all times”. Upon completion of every renovation, the Team Leader carries out an 8 point check on each window and completes a “job sheet” to confirm that everything is complete and fully operational.
We believe that the reputation of Conservation Joinery for quality and value for money speaks for itself, but we will be happy to put you in touch with genuine satisfied customers who have often commented on the dedication we put into our work. Honesty and reliability are just two of the qualities we are proud to uphold.

We offer a range of high-quality services.

  • Repair / refurbish existing sash windows.
  • Create new sash windows in the appropriate style.
  • Period casement windows and French doors.
  • Sash window upgrade service.
  • Supply and fit composite doors.

We can meet the demands of conservation officers for your period property.

The CJ System

Conservation Joinery Ltd offers a quality working system which is second to none. 
Our Overhaul Service is based on tried and tested methods, glues, epoxies and returns your sash windows to full working order.
Step by Step breakdown:

  • All areas are covered with dust sheets while work is being carried out
  • Staff beads and parting beads are removed and discarded
  • Upper and lower sashes are removed as standard
  • All four sash cords are replaced with new cord consisting of an outer traditional cotton weave with a modern polypropylene core for strength and durability
  • Sash pulleys are checked and returned to full working order or replaced (at an additional cost)
  • Both sashes are checked and mid-rails are re-aligned
  • Sash weights are checked and adjusted to balance sashes for correct / easy movement / operation
  • All surfaces are treated and painted with white acrylic primer
  • On completion, all dust sheets are removed and the room fully vacuumed to a high standard
We will not make your sash windows look new, but giving them their '100-year service'. After our work is completed, decorators are generally pleasantly surprised with the amount of preparation we have carried out, making their task easier.
“Our Mission” is to remove all the rot, get the Sash Windows operating again and when they are reassembled the windows are draught proofed.