80 Series thickened single-leaf aluminum alloy window wall thickness selection: Is 1.8mm sufficient? When is a thicker one needed?

When is a 1.8mm wall thickness sufficient?First look at the usage environment before drawing conclusions

Many buyers' first reaction to '1.8mm' is 'is it thick enough?', but this question itself needs to be broken down. Wall thickness is not an isolated parameter; it must be evaluated together with window type, size, floor level, and glass configuration to be meaningful.

Residential and conventional commercial scenarios: 1.8mm wall thickness is a reasonable starting point

For 80-series single casement windows, a 1.8mm wall thickness is a standard-to-upper configuration in residential and conventional commercial projects. It corresponds to the profile'sstructural strengthrather than sound insulation or thermal performance—the latter two are mainly determined by the glass and sealing system. If what you are working on is an ordinary residential bedroom, living room, or an office building or commercial shop with normal floor height, a wall thickness of 1.8mm combined with 5+22A+5 insulating glass is completely sufficient for standard sizes (such as a single casement window of about 1 square meter), and there is no need to make it thicker.

Three core variables to determine whether the wall thickness is sufficient: floor, wind pressure, and glass weight

Whether the wall thickness is sufficient depends on three specific conditions:

1. Floor HeightBelow 10 floors is considered a conventional wind pressure zone, and a 1.8mm wall thickness combined with a reasonable window grid layout is usually not a problem.For buildings above 30 floors or located in wind-prone positions, the wind pressure deformation must be recalculated. In this case, one cannot only consider the wall thickness, but also the profile cross-section design and the reinforced steel liner.

1. Local Wind Pressure: The wind pressure standards vary greatly between coastal typhoon zones, highland wind gap zones, and inland cities.If your project is located in a typhoon-prone area, it is recommended to treat 1.8mm as the "minimum configuration" rather than the "comfortable configuration", and you need to confirm with the team the maximum allowable window sash size for this series under the target wind pressure.

1. Glass weight: If you plan to configure thicker glass (such as single pieces over 6mm, laminated glass, or oversized panels), the self-weight of the glass will significantly increase the sagging of the window sash and the load on hardware components.The glass weight that a 1.8mm wall thickness can bear is limited, and the specific upper limit needs to be confirmed together with the window sash size and hardware load-bearing capacity.

Is thicker wall thickness always better? No

Increasing wall thickness brings three direct costs:Increased profile costs, increased overall window weight, and reduced hardware compatibility range。 For conventional residential projects, a wall thickness of 2.0mm or even thicker does not bring perceptible performance improvements, but may instead accelerate hardware wear due to excessive sash weight. Wall thickness should be "sufficient with a margin," not "the thicker, the safer."

Situations suitable for 1.8mm wall thickness: Ordinary residential, conventional commercial projects, non-typhoon core areas, glass configuration of 5+22A+5 or similar conventional insulating glass, and sash area within 1.5 square meters.

Situations requiring confirmation of thickening: Building height exceeding 30 floors, projects located in typhoon-prone areas, planned configuration of oversized glass panels or laminated glass, and sash area exceeding 2 square meters.

If you are unsure which category your project falls into, the most direct approach is to provide the current website team withFloor height, city location, maximum window sash size, and planned glass configurationProvide these four pieces of information so they can offer matching recommendations based on specific parameters.

When is a thicker wall thickness needed?High-rise buildings, high wind pressure, and large glass are the main variables

A 1.8mm wall thickness is considered a "thickened" grade in door and window profiles, but it is not a one-size-fits-all answer. To determine if it is sufficient, focus on three variables: floor height, local wind pressure, and glass configuration. Below, match your scenario accordingly.

High-rise residential buildings and areas with strong wind pressure: typical scenarios for wall thickness upgrades

Is a 1.8mm wall thickness sufficient for high-rise residential buildings? For most residential buildings under 100 meters, a 1.8mm wall thickness combined with reasonable window mullion spacing (controlling the area of a single sash within 1.5 square meters) can generally meet wind pressure resistance requirements. However, there are two prerequisites: first, the internal structure of the profile must be reasonably designed (the main load-bearing members should have stiffeners or closed cavities), and second, the installation details (spacing of fixing clips, wall connection method) must be properly executed.

If the project is above 30 floors, or the building is located in typhoon-prone areas, canyon wind outlets, or other areas with localized wind pressure amplification, it is recommended to provide the floor height and project city to the current website team, who will perform wind pressure resistance calculations based on the local basic wind pressure value to confirm whether 1.8mm is within the safety margin.

How to choose wall thickness in high wind pressure areas? The criterion is not 'feeling that the wind is strong,' but the basic wind pressure value at the project location (which can be found in local building load codes). In areas with a basic wind pressure of ≥0.6 kN/m² (such as some cities along the southeast coast), or for buildings exceeding 80 meters in height, it is recommended to directly consider a wall thickness of 2.0mm or above, while also reducing the size of individual operable sashes.

The contribution of increased wall thickness to wind pressure resistance is linear, but the moment of inertia of the profile cross-section has a greater impact—that is, under the same wall thickness, the deeper the main frame cross-section and the more stiffeners, the stronger the wind pressure resistance. So don't just look at the wall thickness number; make a comprehensive judgment based on the design of the load-bearing members of the entire window.

Large-size glass configuration: Why glass weight affects wall thickness selection

Does 5+22A+5 glass require thicker profiles? 5+22A+5 insulating glass (two 5mm glass panes + 22mm air layer) weighs about 25kg per square meter, which is a standard configuration. A 1.8mm wall thickness can fully support a single sash of about 1㎡. However, if the following situations occur, consider upgrading the wall thickness:

• Single glass area exceeds 2㎡: The glass's own weight approaches 50kg, and both the hardware load-bearing capacity of the opening sash and the profile rigidity need to be strengthened accordingly. It is recommended to increase the wall thickness to 2.0mm or more.

• Glass upgraded to 6mm or 8mm single pane: When the weight per square meter increases to 30kg or 40kg, the profile wall thickness and hardware specifications must be recalculated.

• Large grid combinations of fixed sashes and opening sashes: Even if a single sash is not large, when the overall window width exceeds 2 meters, the deflection control of the mullions and transoms is more critical than wall thickness, and it is necessary to confirm whether the profile cross-section meets the requirements.

A practical judgment method: convert the glass configuration to weight per square meter (5+22A+5 is approximately 25kg/m²), multiply by the area of a single sash to obtain the sash weight. When the sash weight exceeds 40kg, a 1.8mm wall thickness is usually not the preferred choice; the profile wall thickness, hardware load-bearing rating, and opening method should be evaluated simultaneously.

Summary: A 1.8mm wall thickness is suitable for conventional residential buildings (low to mid-rise, non-strong wind zones, glass area ≤2m²). If your project meets any two of the conditions "high-rise + large glass + strong wind zone," it is recommended to directly submit the floor height, project city, and glass division drawings to the current website team, and let them confirm the wall thickness solution based on actual working conditions, rather than relying solely on experience.

Beyond wall thickness, what other factors determine window performance?Material and glass configuration are equally critical

Focusing only on wall thickness can easily overlook two factors that equally determine the final performance of a window: profile material and glass configuration. For an 80 Series thickened single-opening aluminum window, the 1.8mm wall thickness addresses the issue of "frame strength," while the material and glass address "durability" and "living experience." All three are indispensable.

6063-T5 aluminum alloy profile: why material is as important as wall thickness

6063-T5 is the most commonly used alloy and temper combination in aluminum building profiles. Its characteristics can be summarized in three points:

• Excellent extrusion formability: The 6063 alloy is suitable for extruding complex cross-sectional shapes, which means the window frame can be designed with a multi-cavity structure to improve thermal insulation and drainage performance.

• T5 temper provides more reliable hardness: T5 involves air-cooled quenching followed by artificial aging treatment, allowing the profile to achieve appropriate hardness and strength.If the material is incorrect, even a thicker wall thickness may deform during long-term use.

• Strong adaptability in surface treatment: Whether 6063-T5 profiles undergo anodizing, powder coating, or fluorocarbon spraying, the adhesion is more stable, which directly affects the corrosion resistance lifespan in coastal high-salt fog environments.

An easily overlooked fact is:Wall thickness is a measure of "quantity," while material is a measure of "quality"。 If recycled aluminum with high impurity content is used, even with a wall thickness of 1.8mm, its flexural strength and corrosion resistance may not be as good as standard 6063-T5 profiles with 1.4mm thickness. Therefore, when purchasing, do not only look at the wall thickness, but also confirm the alloy and temper designation on the profile's material certificate.

5+22A+5 Insulating Glass: The Actual Impact of Glass Configuration on Sound Insulation and Thermal Performance

The reference configuration for this product is 5+22A+5 insulating glass, which consists of two 5mm glass panes with a 22mm air layer in between. The practical significance of this configuration is:

• The 22mm air layer is key to sound insulation: The thicker the air layer, the higher the sound insulation of the insulating glass.22mm is a relatively thick air layer configuration, and its sound insulation effect for medium and high frequency noise (such as traffic noise and human voices) is significantly better than the common 9A or 12A configurations.

• Thermal insulation performance comes from 'still air': The thermal conductivity of dry air in the hollow layer is much lower than that of the glass itself. A 22mm air layer can effectively reduce the U-value (heat transfer coefficient) of the entire window, reducing heat loss in winter and heat gain in summer.

• 5mm glass is the basic safety configuration: A single piece of 5mm tempered glass is a common starting point for building doors and windows. Combined with the hollow structure, it balances sound insulation, thermal insulation, and safety.

It should be noted that the impact of glass configuration on performance is often more direct than wall thickness. Wall thickness affects the stability and wind pressure resistance of the window frame, while glass affects the noise level and indoor temperature you feel every day. If the project is located near a street or an elevated road, the importance of glass configuration even exceeds wall thickness.

Which is more important: wall thickness or glass configuration?

The two address different problems and cannot be simply compared in priority:

Practical decision-making advice: If the project is located in a high-rise or high wind pressure area, prioritize confirming whether the wall thickness is sufficient;If the project is located in a noisy area or a region with cold winters and hot summers, prioritize confirming the glass configuration. Only when both are satisfied is it a window with balanced performance. This product's 1.8mm wall thickness paired with 5+22A+5 glass is a configuration that balances frame strength and living comfort, suitable for most residential and commercial projects.

If your project has special requirements (such as oversized sashes or extreme climate zones), you need to confirm with our team whether the wall thickness or glass solution needs adjustment.

How to determine wall thickness based on project requirements?A three-step judgment method provides a clear conclusion.

The reference configuration for the 80 Series thickened single-sash aluminum window is a 1.8mm profile wall thickness, but whether it is sufficient depends on your project conditions, not a fixed answer. The following three steps help you translate project requirements into a wall thickness judgment.

Step 1: Confirm the project floor level and wind pressure environment.

Wall thickness directly affects the window frame's resistance to wind pressure deformation. The higher the floor, the greater the wind pressure, and the higher the requirement for profile rigidity.

• Low-rise (1-6 floors) and non-coastal areas: 1.8mm wall thickness is usually sufficient; focus on sealing and glass configuration.

• Mid-to-high-rise (7-18 floors): It is necessary to confirm the local basic wind pressure value.If the project is located in an open area or a typhoon-prone region, 1.8mm may only be the lower limit. It is recommended to provide the floor number and project city to the team to confirm whether thickening to 2.0mm or adding reinforced steel liners is needed.

• Super high-rise (above 18 floors): It is not recommended to place an order directly based on the reference configuration. You must provide the specific floor and wind pressure zone, and the team will perform a wind pressure resistance calculation and then provide a matching solution.

Step 2: Evaluate Glass Size and Weight

Wall thickness not only resists wind pressure but also bears the weight of the glass. The reference configuration is 5+22A+5 insulating glass with an area of 1 square meter. Under this combination, a wall thickness of 1.8mm is suitable. However, if your project has the following changes, the wall thickness may need to be adjusted accordingly:

• Single pane glass area exceeds 1.5 square meters: The self-weight of the glass increases, and the stress on the window sash profile increases. It is recommended to confirm whether thickening or adding a mullion is necessary.

• Glass thickness increases (e.g., single pane of 6mm or 8mm): The weight increases significantly, and a 1.8mm wall thickness may pose a sagging risk under frequent opening and closing.

• Extra-large compartments (width exceeding 800mm): The wider the single casement sash, the greater the profile deflection, and the wall thickness and hardware configuration need to be confirmed in conjunction.

Step 3: Confirm customization boundaries and process

This product supports customization according to drawings, but customization is not 'arbitrary changes'. You need to clarify the following information and submit it to the team:

1. The city and specific floor where the project is located(for wind pressure assessment)

1. Window type division dimensions and opening method(single opening direction, whether to include screen window)

1. Glass configuration requirements(whether to continue using 5+22A+5, or need adjustment)

1. Batch quantity(the process for sample confirmation and batch orders is different)

The customization process is: submit drawings and requirements → team confirms profile wall thickness, glass configuration, and hardware solution → sample confirmation → batch production. Sample confirmation is a mandatory step., especially when adjusting the wall thickness, be sure to first make a sample to verify the installation and opening feel before proceeding to mass production.

Frequently Asked Questions

Q1: My project is on the 15th floor. Can I directly use a 1.8mm wall thickness? You need to provide the project city and whether it is near the sea. The 15th floor is considered mid-to-high rise. If the local wind pressure is not high and the partition dimensions do not exceed the reference configuration, 1.8mm is acceptable.If it is near the sea or in a wind-prone area, it is recommended to provide the specific address for the team to conduct a wind pressure resistance review.

Q2: If the glass is changed from 5+22A+5 to 6+22A+6, does the wall thickness need to change? The glass weight increases by about 20%, and it is recommended to evaluate this simultaneously. If the sash size remains unchanged and does not exceed 1 m², 1.8 mm may still be acceptable, but the risk of sagging when opening increases.

The safest approach is to send the new glass configuration to the team to confirm whether thickening or hardware adjustment is needed.

Q3: What is the minimum order quantity for custom wall thickness of 2.0 mm? The MOQ depends on profile mold development and extrusion batches; different wall thicknesses may have different MOQ requirements. Please provide your estimated purchase quantity directly to the team, and they will give you the corresponding MOQ and lead time.

Q4: What should we mainly check during sample confirmation? Focus on three areas: the sealing fit after the sash is closed, the smoothness when opening (whether there is a sagging feel), and the flatness at the profile joints. Especially after increasing the wall thickness, confirm whether the hardware fits tightly with the profile grooves.

Q5: What if I can't clearly describe my project requirements right now? First determine the floor, grid dimensions, and glass configuration; the rest can be supplemented later. It is recommended to first make a sample based on the reference configuration (1.8mm, 5+22A+5, 1㎡), and after receiving the actual product, decide whether to adjust the wall thickness based on the actual installation environment.

Learn More

If your project is in preparation, you are welcome to submit your floor height, city, window sash dimensions, and glass configuration requirements to us. Our team will provide matching wall thickness and configuration recommendations based on the specific working conditions and assist in completing sample confirmation.

Related Products:80 Series Thickened Single-Opening Aluminum Window