uPVC Sliding Sash Windows

we have combined  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.

Gm Windows sash windows eliminate the common problems associated with wooden sash windows, such as sticking, rattling, and difficulty opening and closing. Gm Windows Upvc sash windows give a smooth and easy opening and closing action.

  • Made with top of the range weather resistant materials
  • Custom sizes available
  • A-C rating for thermal performance
  • Come in a range of designs
  • Variety of glass options

We appreciate that the finished product is not always the reason why you would chose a GM Windows sash windows. A lot of other factors are considered such as price, quality and delivery times, however we would like to bring your attention to a few of the intricate aesthetic detail which we think sets our windows apart from the rest of the competition.

The Renaissance profile system that we manufacture our sliding sash windows from is unique. It is relatively new as far as profile systems go and was originally designed about 10 years ago taking all of the best elements from the windows systems around at the time in an effort to create something truly unique in the market plac.

Hazy Grey
Beck Brown
Dark Green
Cream White
Anthracite Grey
Chartwell Green
Irish Oak
light oak


At GM Windows, we want to offer our customers complete adaptability and versatility. Because each of our PVC-U window installations is tailored to suit its specific location, no two are exactly the same. And to make sure that every window completely fits in with its surroundings, we offer a contemporary colour range to match every style. GM Windows & Doors Options Colour Range has been selected with modern homeowners in mind. The Cream White is a warm cream colour that complements a range of styles, but is ideally suited to both modern and traditional red brick homes. A new addition to the range is Agate Grey, a subtle blend of beige, green and cream which we know will prove very popular on new and renovated homes, especially barn conversions.  

Siena PR
White Grain
Steel Blue
Dark Red
Slate Grey