How to Choose the Right Glass for Aluminum Alloy Doors and Windows

Aluminum alloy doors and windows  are widely used in various buildings due to their aesthetic appeal, durability, and excellent sealing properties. As a crucial component of these doors and windows , glass not only affects their appearance and performance but also directly influences indoor lighting, energy efficiency, and safety. So, how do you choose the right glass when purchasing aluminum alloy doors and windows ? Below, we will provide a detailed overview of different types of glass.

(1) Standard Glass

Standard glass is the most common type used in aluminum alloy doors and windows. It offers good light transmission and is relatively inexpensive, making it suitable for places with high lighting requirements but low demands for sound insulation, thermal insulation, and safety—such as ordinary residential windows and balconies. However, standard glass has low strength, is prone to breaking, and can form sharp shards upon impact, posing safety risks.

(2) Tempered Glass

Tempered glass is produced by heating standard glass to a high temperature and then rapidly cooling it. It is several times stronger than standard glass and has excellent impact resistance. Even if it breaks, it forms small, blunt granules, significantly reducing the risk of injury. Therefore, tempered glass is commonly used in high-rise buildings, glass curtain walls, and areas with safety requirements, such as bathrooms and kitchens. Additionally, tempered glass provides some thermal insulation, helping to regulate indoor temperatures by blocking heat transfer.

(3) Laminated Glass

Laminated glass consists of two or more glass layers bonded with one or more interlayers of plastic film (such as PVB or SGP) through high-temperature and high-pressure processing. It offers excellent impact resistance and safety—even when shattered, the glass fragments remain adhered to the interlayer, preventing scattering. Laminated glass also provides superior sound insulation, effectively blocking external noise to create a quieter indoor environment. Moreover, it has certain fire-resistant properties, slowing the spread of flames in case of fire. As a result, laminated glass is often used in doors and windows for schools, hospitals, shopping malls, and other places with high safety, soundproofing, and fireproofing requirements.

(4) Insulated Glass (Double Glazing)

Insulated glass is made by sealing two or more glass panes with a spacer bar to create an air gap, which is then filled with desiccant and sealed airtight. The air gap provides excellent thermal and sound insulation, reducing heat transfer and minimizing temperature differences between indoors and outdoors. This helps lower the frequency of air conditioning and heating usage, improving energy efficiency. Additionally, insulated glass effectively blocks external noise, ensuring a comfortable indoor environment. Its lifespan typically ranges from 15 to 20 years. However, insulated glass is relatively expensive, and proper installation is crucial to maintain its sealing performance, as any failure can compromise its insulation and soundproofing effects.

(5) Low-Emissivity (Low-E) Glass

Low-emissivity (Low-E) glass is coated with one or more layers of metal or metal oxide film, which reflects infrared radiation to reduce heat transfer. Low-E glass offers outstanding thermal insulation, preventing excessive indoor heat in summer and heat loss in winter. It also maintains good light transmission without compromising natural lighting. Furthermore, Low-E glass provides UV protection, blocking most ultraviolet rays to safeguard indoor occupants and furnishings. Due to these advantages, Low-E glass is commonly used in high-end residences, office buildings, and hotels, making it one of the most advanced energy-efficient glass options on the market.

Key Considerations When Choosing Glass

Safety: Tempered or laminated glass is recommended for high-risk areas.

Sound Insulation: Laminated or insulated glass works best for noise reduction.

Thermal Insulation: Low-E glass or insulated glass improves energy efficiency.

Budget: Standard glass is cost-effective but lacks safety and insulation.

By understanding these glass types and their properties, you can make an informed decision based on your specific needs for aluminum alloy doors and windows .

If you'd like to learn more about the selection and application scenarios of different glass types, stay tuned for our next issue!