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Q Is insulated glass expensive?
A While IGUs cost more than single glazing, the long-term energy savings, durability, and comfort often justify the investment—especially in high-performance or sustainable building projects.
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Q What causes IGUs to fog or fail?
A Seal failure due to poor materials, improper handling, or UV exposure can cause gas leakage and condensation between panes.
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Q How should insulated glass be installed?
A It should be installed within a compatible frame system, using proper sealing materials, and handled with care to avoid stress on the edges and seal.
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Q Do I need triple glazing for energy efficiency?
A Not always. Triple glazing offers better performance but may not be necessary in mild climates. Double glazing with Low-E and argon may be sufficient for energy codes in many regions.
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Q Can IGUs be customized for specific climate zones?
A Yes. Glass thickness, coating type, cavity width, spacer material, and gas filling can all be optimized for cold, hot, or humid climates.
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Q Where is insulated glass commonly used?
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Q What gases are used between the glass panes?
A Typically argon, krypton, or air. Argon is most common due to its cost-efficiency and insulation properties.
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Q Can IGUs be used in large format or curtain wall applications?
A Yes. Jumbo IGUs up to 3300mm x 7000mm are available and commonly used in commercial facades and premium architectural projects.
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Q What is a warm-edge spacer, and why is it important?
A A warm-edge spacer (e.g., LiSEC fiberglass or Quanex Super Spacer®) reduces thermal bridging at the edge of the unit. It improves energy efficiency and reduces condensation risk.
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Q Does insulated glass reduce noise?
A Yes. Depending on thickness and configuration, IGUs can reduce noise by 30–40 dB or more, making them ideal for urban buildings or homes near highways.
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Q How long does insulated glass last?
A High-quality IGUs can last 20–30 years or more if properly manufactured and installed. Premium products (like those using LiSEC or Super Spacer® systems) may offer warranties of up to 25 years.
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Q What are the benefits of using insulated glass?
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Q What is Low-E insulated glass?
A Low-E (low emissivity) glass has a microscopically thin metallic coating that reflects heat while allowing visible light. It enhances insulation by reducing heat transfer.
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Q What are the typical configurations of IGUs?
A Common setups include:
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Double glazing: 4-12-4 (two panes, one spacer)
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Triple glazing: 4-12-4-12-4 (three panes, two spacers)
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Variants with Low-E coatings, warm-edge spacers, and gas filling.
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Q What is insulated glass (IGU)?
A Insulated glass, also known as a double or triple glazing unit, is a sealed combination of two or more panes of glass separated by a spacer and filled with inert gas (like argon). It provides improved thermal insulation, noise reduction, and energy efficiency compared to single-pane glass.
