GBS-78 triple glazed windows and doors

GBS-78 is an ideal choice for low-energy projects, whether simply replacing your windows or specifying for a new home. GBS -78 is a cost-effective replacement for retrofits and low-energy newbuild projects. With a choice of designs and styles, this range will enhance your project at a competitive price.

Links to technical drawings, PHPP 10 information and declarations can be found on our technical page.

Due to the complexity of specifying our products, we have a minimum order policy. To realise the benefits of triple glazing, including the continuity of thermal performance, we only recommend replacing windows throughout all of your home for replacement or retrofit projects.

Outward opening

A flush casement window hung from the top or side.

U value: 0.83 W/m2K
• Triple unit: Argon fill 44mm
• Light transmission value: 73%
• Triple glazed as standard

outward opening
blank

Inward opening

Tilt and turn window options.

  • U value: 0.80 W/m2K
  • Triple unit: Argon fill 44mm
  • Light transmission value: 73%
  • Triple glazed as standard

tilt-and-turn
blank
Entrance Door

Tend to be single doors, usually inward opening. A range of options are available.

  • U value: 0.95 W/m2K
  • Inward and outward opening entrance doors
  • A range of standard and contemporary designs
  • Aluminium-clad doors available
  • Insulated frame option
  • Dual compression seals for long-term airtightness
  • Secured by Design option

french doors

Available as inward or outward opening double doors.

  • U value: 0.90 W/m2K
  • Ideal for low energy retrofits and newbuilds
  • Dual compression seals for long term airtightness
  • CAD drawings available on request
  • Maximum size 2200mm x 2400mm
  • Triple glazed as standard

Lift and slide doors

One of the most energy efficient lift & slide doors available in the UK.

  • U value: 0.82 W/m2K
  • Ideal for low energy retrofits and newbuilds
  • One pane of the door slides behind the other, with options for one pane or both panes sliding
  • Dual compression seals for long term airtightness
  • CAD drawings available on request
  • Maximum size 2200mm x 2400mm
  • Triple glazed as standard

Affiliations & Accreditations