Our best-selling triple glazed windows & door range for energy efficient projects.
Green Building Store’s cost-effective range for replacement windows/doors, retrofits and low energy newbuild projects. With FSC® certified timber, low U values and a range of designs and styles, our GBS-78 formerly named Performance range will enhance your project at a competitive price.
- U value as low as 0.85 W/m2K
- Dual compression seals
- FSC® certified timber in redwood & oak
- Alu-clad option for inward-opening windows
- Part Q compliant and Secured by Design options
- Triple glazed as standard
Our windows and doors are available in the following styles:
Casement
Tilt & turn
Entrance door
French doors
Sliding doors
Bi-fold doors