Sliding Sash Windows

Designed by Spectus Window Systems to provide all the benefits that can be derived from high performance, modern materials, the Spectus vertical slider provides a long term, cost-effective solution for period style properties.

Advanced technology works in harmony with traditional design to provide extra comfort and practical features for modern living, without any compromise to character or appearance.

Profiles are manufactured to the highest standards, from a formulation which includes a high impact modifier to withstand cold weather and a UV light resistant pigment to maintain colour and appearance for years to come. It is this formulation which prevents the PVC profile from degrading, bending, or warping. Structural strength is enhanced through the use of steel or aluminium reinforcement through the internal chambers of the profile. The Spectus VS also has an optional aluminium interlock for the top sash which increases the rigidity of larger windows. Years of engineering experience mean that you can have total confidence in the durability and longevity of the window frames, without the hassle and cost of routine maintenance or spoiling the appearance of the property.


  • Decorative sash horns – fitted as standard
  • Hardware colour – white, silver or gold (fitted as standard)
  • Between the glass or on the surface georgian bars
  • Easy-clean tilt restrictors – fitted as standard
  • Low e glass & argon – fitted as standard
  • Narrow or wide bottom rail – we fit narrow as standard
  • Optional child restrictor catches
  • White, Rosewood or Golden Oak on one or both sides

Spectus Window Systems

Authentic, traditional appearance with all the benefits of low maintenance pvcu.