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West London's sash window specialists

Offering a specialist family-run service from our base in Twickenham, SashWise has been replacing, renovating and restoring sash windows in West London since 2006.


Bringing West London’s sash windows to life

Whether it’s new double sash windows in Wimbledon, draught-proofing in Kingston or window sill replacement in Kew, SashWise serves customers right across West London. Why not take a look and see if we cover your area?


Checkatrade is the UK’s best-known guide to trusted tradespeople. Here’s what our customers have to say.


We’re proud of the sash window projects we’ve delivered to our happy customers in West London. To get inspired, take a look at our Gallery and see the difference SashWise makes.

Case Studies

Throughout West London, SashWise has helped people transform their sash windows and the appearance, security and warmth of their homes.

Tips from the trade

We’re always happy to share our sash window knowledge and expertise. That’s why our Blog is packed full of some really useful hints, tips and advice on getting the very best from your sash windows.

10 reasons to choose SashWise

Throughout West London, our customers know they can trust SashWise to transform their sash windows and make their home a warmer, safer and more beautiful place to live.

  1. Time-served craftsmen: no-one knows the job better than our dedicated local team of sash window fitters and joiners. We don’t sub-contract, so you can trust us to deliver on time and on budget.
  2. Treating your home with care: from the moment we arrive to the moment we leave, dust sheets protect your furniture and all debris, dust and old materials are removed.
  3. Stopping rot in its tracks: if we discover any rot in your windows whilst we’re working, we will remove it there and then. It’s all part of the service.
  4. Specialist sash window workshop: our workshop in Twickenham means we can fully restore windows offsite, minimising disruption to your home
  5. Like for like windows: we’re able to match the exact size, style and colour of your current sash windows, pane-for-pane, frame for frame.
  6. Unbeatable draught proofing: unlike other sash window companies, we use new wooden parting and staff beads with hidden sash window draught-excluder brushes to keep things looking good and working better.
  7. The best materials: from the highest-grade sash cord to the most durable and sustainable Accoya wood frames and high-grade specialist paint – only the best will do.
  8. VAT-free: thanks to current government rules around carbon emission reduction, all our draught exclusion work is VAT free.
  9. Guaranteed workmanship: we’re so confident of the work we do that our windows come with a 10-year guarantee covering workmanship and materials
  10. Safe and secure: with a wide range of window fittings and locks to choose from, your new sash windows with keep you safe and secure in your home.

How can we help?

Send your details and we’ll get back to you as soon as we can. There is no obligation and no high-pressure sales. We would love to hear from you and listen to your requirements.

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