Frequently Asked Questions
How is Cortizo different from other sliding door brands?
Cortizo is a systems house that manufactures the extrusions to a consistent European standard. The difference shows in the machining tolerances, the quality of the thermal break, and the hardware — particularly the lift-and-slide mechanism. Cheap sliding doors are often standard sliding (no lift) with thicker sight lines and inferior weatherseals.
Can Cortizo systems accommodate triple glazing?
Yes. Triple glazing is available in the COR 70 system and significantly improves thermal performance — relevant for projects aiming for high energy performance standards.
How long does a Cortizo sliding door installation take?
Installation of a standard 3- or 4-panel system typically takes one to two days, depending on the structural opening preparation and whether a concrete upstand or structural steel has been prepared by the main contractor.
What's the lead time for Cortizo doors?
Typically 5–8 weeks from confirmed order, depending on configuration and RAL colour.