Red Seal Glazier Practice Exam

When insulating glass units are improperly sealed, condensation may occur inside the unit. This happens because the seal is designed to keep the space between the panes of glass filled with a gas, often argon or krypton, to improve energy efficiency. If the seal is compromised, moisture from the air can enter the space between the panes. This moisture can condense, especially in cooler temperatures, leading to fogging or water droplets forming on the inner surfaces of the glass. This condensation not only affects visibility but also indicates that the insulating properties of the unit have been compromised. It demonstrates a failure in the thermal insulation that the unit was supposed to provide, which negatively impacts energy efficiency. Additionally, prolonged moisture exposure can lead to mold growth between the panes and can eventually damage the unit, necessitating repair or replacement.