U values as low
as 0.85 W/m2K
as 0.85 W/m2K
Triple glazed
as standard
as standard
Nationwide fitting
or supply only
Choose from a wide
range of colours
FSC® certified timber
Part Q compliant and
Secured by Design options
Our best-selling triple glazed windows & door range for energy efficient projects
PERFORMANCE is 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 PERFORMANCE range will enhance your project at a competitive price.
- U value as low as 0.85 W/m2K
- 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 PERFORMANCE windows and doors are available in the following styles:
Casement
Tilt & turn
Entrance door
French doors
Sliding doors
Bi-fold doors