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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  • Very impressed with the service from Sash Window Preservation. Staff dealing with the quote were very helpful and professional nothing was too much trouble even when I changed the requirements. The work was completed on time to a very good standard and the refurbished sash windows have really improved the overall appearance of my Cambridge house. The windows are no longer draughty and the house is quieter - now looking forward to cheaper heating bills
    — Trevor Steel, Cambridge
  • The remade sashes are beautiful, with the division bars as fine as I could have wished and the slim double glazing units quote inconspicuous. I was so impressed by the work done by the carpentry and fitting team.
    — Mrs Hannaford, Norwich
  • We were keen to reuse our existing frames if possible, and in two out of three sash windows that proved to be the case. Grouting out in situ is a messy business, even done out on a patio, but Jerome and Paul were excellent and expert carpenter-joiners, and took the utmost care to protect the environment from dirt and dust, cleared up assiduously and kept up a cheerful banter throughout the job. It was a pleasure to host them, and now we have a cosy home with smoooothly gliding sashes.
    — Martin Nelson, London
  • 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
  • The work is fantastic, really glad we decided to do it. Couldn't be happier.
    — Mr Nicholson, Cambridge
  • I was very happy with Darren and Jesse who completed the work. They were tidy, polite and careful workmen.
    — Mim Ramsby, Norwich
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