Uploaded April 2021 | Updated September 2026, 7 hours ago

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Installation of ProVia's Endure and Aspect three-lite sliding glass patio doors isn't complete until the last screw cap of the interlock rail/mull post is placed. Conrad Mast, ProVia's director of installation support, provides a step-by-step demonstration of installation of the mullion assembly.

LEARN MORE about ProVia's Endure and Aspect sliding glass patio doors:
- Endure vinyl sliding patio doors: provia.com/doors/patio-doors/endure
- Aspect vinyl sliding patio doors: provia.com/doors/patio-doors/aspect

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