What are altimetric valves and what are they used for?

Altimetric valves are accessories designed to protect insulating glass units (IGUs) from atmospheric pressure variations. Their main purpose is to compensate for pressure changes when glass units are installed at different altitudes than where they were manufactured. This helps prevent glass deformation, breakage, or loss of airtightness.

Key benefits

  • Protection from overpressure or vacuum
  • Preservation of insulating performance
  • Easy integration into spacer profiles

When are they recommended?

  • Installations located above 500 meters of altitude
  • Projects involving significant altitude differences between production and installation site
  • Large-format or double/triple glazing units where pressure effects are more pronounced

Conclusion

Altimetric valves offer a simple yet highly effective solution to ensure the long-term performance of IGUs in mountainous or high-altitude areas. A small component that makes a big difference in thermal, acoustic, and structural performance.