Sash Windows Installation and Refurbishment | SashWise

Introducing SashWise the timber sash window specialists

SashWise is a family-run sash window company based in Teddington, West London. We have been operating in the local area since 2006 and will provide you with a reliable, personal, high quality and cost-effective sash window service.

We are specialists in the restoration, replacement and reinstatement of traditional timber sash windows. As well as this we also specialise in dealing with rot repair and enhancing the security of your sash windows. We can also completely replace your sash windows with new Accoya hardwood double glazed sashes, and we can repair or fully restore your original windows.

Whatever problem you have with your sash windows, or are looking to upgrade the look of your home, we have the right solution to achieve beautiful windows.

Find out the locations in London we cover.

Play our latest video featuring the gorgeous No.17 house 

A snapshot of our services include:

  • Servicing and draught-proofing
  • A full restoration of your sash windows
  • New hardwood double glazing
  • New hardwood sash window boxes
  • Sash window rot repair and security
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Over 300 Checkatrade reviews and counting

Our sash window services

Servicing and draught-proofing

If jammed sash windows with broken cords are a problem, then this service will get them working smoothly again for you.

Full restoration

We completely and sympathetically restore your windows, so they will look like new without losing any of their original features.

New hardwood double glazing

At SashWise we can make new double glazed hardwood timber sash windows to fit within your original box sash frame.

New hardwood sash boxes

We can supply and fit new hardwood sash boxes complete with double glazed sash windows that replicate the originals.

A timelapse video of a sash window installation

Client testimonials

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