Repair & Restoration

If your sash windows, frames or sills are in need of some TLC, we can offer varying techniques to solve common problems such as minor or major rot, cord renewal and window rebalancing.

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At Sash Window Preservation we are market leaders in double glazing existing frames. How? By creating a deeper rebate in the original frame this allows us to fit in a slim double glazed unit.

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Draught Proofing

Our special draught excluder is fitted in the meeting rail along with the staff and parting beads. This leads to vast improvements to the thermal performance of the window and heat retention.

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We have restored, repaired and renovated many sash windows belonging to schools, halls, estates and other commercial buildings. Just take a look at some of our successes.


We can help return your home’s sash windows back to their former glory with the minimum of mess and fuss.

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Presenting the sash window double glazing installation process

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  • I cant recommend this company enough. From the initial contact, to the standard of the workmanship, it has been excellent. Ben, Scott and team were a pleasure to have in the house, they completed the work to an excellent standard and kept everything lovely and tidy while doing so. We weren't around much as things came up and Ben just got on with the job and managed situations as they arose. It is rare to be completely happy with a job but I can say with confidence that this company does what they say they are going to do, from turning up when they have agreed to completing the job to a high standard. Many thanks to you all.
    — Lucy Kenyon, Norwich
  • Sash Window Preservation were very professional throughout from the initial survey to carrying out the work. We were so surprised that so little disruption was caused and were delighted that the windows could be repaired as feared replacement. The fact we were given a fixed priced was a real bonus as we knew exactly how much the work would cost us. All in all we can thoroughly recommend Sash Window Preservation.
    — Mr Coe, Wymondham
  • 4 days solid work undertaken to repair and draught proof 7 sash windows, to install one new sash window (with SWP's slim double glazing, which allows for a slim frame in keeping with the original windows), work on sills, and draft proofing 3 outside doors. Ben and Scott were knowledgeable, friendly and tidy, and a pleasure to have around the house (tea and coffee for both: strong, white and 2 sugars). No draughts anymore in the house, smoothly sliding sashes - the kind of workmanship ones hopes for but rarely gets to enjoy. Strongly recommended for anyone who needs work on sash windows undertaken!
    — Meg Prolingheuer, Colchester
  • Really impressed with the firm. They closely matched existing sash windows for a new window to my property in Loughton. Would definitely use them again and recommend.
    — Peter MaCallan, Loughton, Essex
  • Needed complete repair of a sash window in one of the bedrooms in our Georgian house. (It was so bad that the wood had rotted through at the bottom and there was natural ventilation!) The major work was carried out by Adam. He was professional, courteous and made an excellent job. (Cleaned up after the fitting, which had created quite a lot of mess. Very impressed.) The window was made to match the other one in the room and is perfect. If any of the other windows need repairing at some point, then I'll be calling this company without hesitation.
    — June Collen, Lowestoft
  • Thanks for all the hard work in double glazing my sash windows, most noticeable in the kids room where we don't have water running down the window any more!
    — Mrs Massie, Saffron Walden
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