Sliding Sash uPVC Window / White / 1200mm x 1150mm - Standard Glass / Trickle Vents / 225mm cill / Run Through Horns / Gold Furniture / Sash Lifts / Astragal Bar This window is in stock - delivery £70 or collect for free (RG7 4HG) If you are after other sizes or colours please contact us for a quote. Vertical sliders are a traditional style of window. Commonly found in older properties, they are usually manufactured from timber. This elegant type of window is a popular replacement in period houses, its design giving your home a sophisticated charm and style that you won’t achieve from a standard casement window. Real timber windows can be expensive so homeowners look to more affordable solutions such as uPVC.