Plan the opening
Not every section of a sliding door moves. Ask for fixed and moving panels to be shown clearly on the drawing and check the usable passage. Include furniture, curtains and access to the terrace in your planning.
Threshold and drainage
A low threshold needs careful coordination with internal flooring, terrace construction and drainage. Discuss the installation detail before ordering. Accessibility and weather protection should be assessed together for the actual levels and exposure at your property.
Try the operation
Opening and closing feel different across systems and sizes. Try a comparable configuration and ask about locking, maintenance and access for cleaning. Have any child-related features or additional security options listed separately in the proposal.