UPVC Sliding Sash Windows

UPVC Sliding Sash Windows

Modern Sliding sash windows from Costello Windows are made from UPVC. In the past these windows have been made from timber. This makes for a warmer, draft proof window. Sliding Sash windows give an elegant and sophisticated look to period houses. They are also suitable for other types of homes. Our UPVC sliding sash windows come in white as well as a range of woodgrain effect colours. These sliding sash windows are a more affordable option to timber made windows.

Costello Windows

Tilt & Easy Clean Function

UPVC Sliding Sash windows from Costello Windows only require a quick wipe down with a damp cloth to keep them looking as good as new. The window sashes feature an inward opening tilt facility to allow easy and safe cleaning of the outside frame and glass from inside the building. This is particularly useful for multi-storey windows or windows positioned in hard to reach places.

Authentic Sash Details

UPVC sliding Sash windows are as authentic looking as possible. Featuring slim profile sections with design aesthetics which are pleasing to the eye. Offering improved views from the inside and outside. Our windows incorporate the same stylish features found on original timber sash windows such as Astragal glazing bars, decorative sash horns and traditional style operating hardware. The jambs sash sections and meeting rail are all engineered to look just like an original timber sash window.

UPVC Sliding Sash Window Features

U-Value 1.5 W/m²K

Sashes move up & down, and inwards

Independently certified with BS test simulator

Argon gas filled units

Warm edged spacer bars

Double glazed

U-Value 1.5 W/m²K

Thermal Insulation
Double Glaze U-Value 1.4 W/(m²K)

Thermal Insulation
BFRC Rating of A+

Window Size
Any size up to 1300 mm x 2400 mm

Technical Details

Air Permeability
600 Pa / Class 2

Wind Resistance
1600 Pa / Class 4

200 Pa / Class 5A

Window Colour Options

Anthracite Grey
Silver Grey
Agate Grey
Light Cream
Golden Oak

Handle Colour Options

Please Note

  • Image colour may vary slightly to end product
  • Standard Interior colours are white and light cream
  • All colours have a woodgrain effect except white