Supreme Windows London supplies and fits uPVC sash windows across Croydon, Thornton Heath and South London. Sash windows give a home that timeless, traditional character, and our uPVC versions deliver the classic look with none of the upkeep of timber. They slide smoothly, seal tightly and are far more energy efficient than the original windows they replace. Every installation is FENSA registered.
Call 020 8050 4602 or request a free quote to get started.
Why choose uPVC sash windows
uPVC sash windows are ideal for period and traditional homes, and for anyone who loves the classic sliding-sash look but wants modern performance.
- The authentic look of traditional timber sash windows
- Low maintenance, never needing painting and only an occasional wipe
- Energy efficient, with double glazing as standard to cut heat loss
- Secure, with modern multi-point locking built in
- Smooth to open, with a balanced sliding action and easy-clean tilt feature
- Cost-effective compared with timber, with a longer lifespan
uPVC or timber sash windows
Both give you that classic sash look. uPVC is the lower-maintenance, better-value choice and never needs repainting, while timber sash windows offer the most authentic finish for conservation areas and period homes where real wood is preferred. We are happy to advise on the best option for your property at your free survey.
Colours and finishes
- Classic white, the traditional sash window finish
- Cream and heritage colours for a period-authentic look
- Woodgrain foil finishes that mimic real timber
- Traditional hardware and furniture options to complete the style
How it works
- Free survey and quote. We visit, measure up and give you a written, no-obligation price.
- Manufacture. Your sash windows are made to your exact measurements and chosen finish.
- Installation. Our own fitters install them cleanly and tidily.
- Certification. You receive your FENSA certificate and guarantee on completion.
Frequently asked questions
Do uPVC sash windows look like real timber?
Yes. With woodgrain finishes, traditional hardware and authentic proportions, uPVC sash windows closely match the look of timber, without the painting and upkeep.
Are uPVC sash windows suitable for period homes?
They suit most period homes and are a popular, cost-effective choice. In some conservation areas timber may be required, in which case we can supply timber sash windows instead. We will advise at your survey.
How much do uPVC sash windows cost?
It depends on the number of windows, the size, the finish and the glazing. We give a fixed written price after a free survey rather than a misleading average. Request a quote for an exact figure.
Are your windows FENSA registered?
Yes. Every installation is FENSA registered and certified as compliant with building regulations, with a certificate provided on completion.
Areas we cover
We supply and fit uPVC sash windows across South London and Surrey, including Croydon, Thornton Heath, Bromley, Sutton, Orpington, Norbury, Streatham, Tooting, Beckenham, Wallington and Banstead.
Get a free quote
Ready for classic sash windows with modern performance? Call 020 8050 4602 or request your free quote online today.