Are uPVC sliding sash windows any good?
Yes, when the specification is right. Modern uPVC vertical sliders run on spiral or block-and-tackle balances, tilt in for cleaning and meet the 1.4 W/m²K replacement limit. Their weakness is chunkier meeting rails and bars than timber, which good sash-style detailing reduces.
What should a good uPVC sash have?
- Mechanically jointed or sculpted profile with slim sightlines
- Sash horns and woodgrain or painted-look finish
- Quality balances that hold the sash at any height
- Tilt-in sashes for cleaning from inside
- Trickle vents or head vents matching original ventilation
How do they compare with timber sash windows?
uPVC sash windows seal better and need less upkeep. Timber is easier to repair and often preferred in conservation areas. Check your council’s rules before choosing uPVC on a period front elevation.
Are they a good fit for London terraces?
Many Victorian terraces in Walthamstow and Stamford Hill were built with sliding sashes, so a vertical slider keeps the facade pattern. Browse our uPVC sliding sash windows. Ask to see a sample sash operate before ordering, as balance quality is the biggest difference between systems.
Thinking about new windows? We supply and fit across Stamford Hill, Haringey, Enfield, Barnet, Ilford and the rest of North and East London, with a 10-year guarantee and FENSA-registered installation. Call 020 8800 1838 or request a quote.