For pressure-glazed systems, which method is optimal for ensuring a waterproof seal?

The optimal method for ensuring a waterproof seal in pressure-glazed systems is the application of glazing tape. This specialized tape is designed to create a tight seal between the glass and the frame, effectively preventing water infiltration. Glazing tape is typically made of materials that can withstand weather elements while maintaining flexibility, ensuring long-lasting adhesion and resilience against environmental changes.

The use of caulking provides a seal but may not offer the same level of flexibility and durability as glazing tape over time, particularly in a pressure-glazed application where movement can occur. Glass setting blocks are essential for supporting the glass and maintaining proper spacing but do not contribute directly to sealing against water intrusion. Metal flashing plays a role in directing water away from critical areas but does not seal the interface between the glass and frame itself.

By using glazing tape, contractors can achieve an effective barrier against water, enhancing the overall performance and longevity of the pressure-glazed system.