What is the maximum edge pressure that can be applied to insulating glass for a weather-tight seal?

The maximum edge pressure that can be applied to insulating glass for a weather-tight seal is determined by the structural integrity of the glazing system and its ability to maintain an effective seal against moisture and air infiltration. A pressure of 10 lb/linear inch is recognized as a standard threshold that balances performance and durability. This level ensures that the insulating glass unit can withstand environmental conditions while preventing the failure of the sealant materials used to bond the components together.

Going beyond this pressure could compromise the effectiveness of the seal, potentially leading to sealant failure, moisture penetration, and loss of thermal insulation properties, which are critical for the energy efficiency and longevity of the glazing system. Thus, adhering to a limit of 10 lb/linear inch is essential in practice to ensure the reliability and performance of the insulating glass in various weather conditions.