Red Seal Glazier Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the role of a spacer in insulated glass units (IGUs)?

To separate the two panes of glass and maintain spacing for thermal performance

The role of a spacer in insulated glass units (IGUs) is primarily to separate the two panes of glass, ensuring an appropriate distance between them. This spacing is crucial for maintaining thermal performance and energy efficiency in the window. It helps to minimize heat transfer through the glass, thereby contributing to better insulation and reducing energy costs for heating and cooling.

Additionally, the spacer also influences the overall structural integrity of the IGU by preventing the panes from making contact with each other. It often contains desiccants, which help remove moisture from the air trapped between the panes, preventing condensation and maintaining clarity over time. Thus, choosing the appropriate spacer material and design is essential for the effectiveness and longevity of insulated glazing systems.

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To enhance the visual clarity of the glass

To act as a decorative border

To facilitate window cleaning

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