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Here at Washington Aluminium Services Ltd we have married the vintage charm of sliding sash windows with the modern expectancy of leading thermal efficiency.

We use the very best hardware, including top-of-the-range operating mechanisms, which make our hand-built PVCU windows virtually indistinguishable from the timber windows they could be replacing.



Our latest range of sash windows uses specially designed steels to enable window sizes of up to 1600mm by 3000mm. Strongside tracks and cross-bars ensure the window stays square and slides effortlessly every time.


Locks conform to the Police's Secured By Design standard and security's further enhanced by an aluminium security bar that blocks the tracks when engaged to prevent the window from being levered.



The overall result is a beautiful, sturdy sliding sash window which, until just a few years ago, would have been priced very much at the premium end of the market. Our latest products change all of that



Explore our latest supplied and installed sash windows in and around Washington.


Our sash windows are uniquely designed with a period look and feel, so they preserve your property’s historic charm whilst enjoying all the perks of a modern window.

Our sash windows feature key-lockable traditional style fitch locks, as well as additional security features to ensure they are safe, secure and reliable.

There is a comprehensive 10 year guarantee on the whole window and installation on all our sash windows, and our timber sash windows come with a 30 year guarantee against rot and fungus.

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