How to choose the right size for aluminum alloy doors and windows?
Release Date:
2025-09-29
Selecting the appropriate dimensions for aluminum alloy doors and windows requires a comprehensive consideration of building codes, functional requirements, and environmental factors. The following are systematic recommendations based on industry standards and best practices.
Selecting the appropriate dimensions for aluminum alloy doors and windows requires a comprehensive consideration of building codes, functional requirements, and environmental factors. The following is a systematic set of recommendations based on industry standards and best practices:
I. Profile Series and Thickness Selection
Series Matching
Sliding and casement windows: Common window series include 55, 60, 70, and 90; common door series include 70 and 90. For enclosed balconies, we recommend using at least the 70 series to enhance wind-pressure resistance.
Casement windows and doors: windows are typically available in the 40, 50, and 70 series, while doors are usually offered in the 50, 55, and 70 series; for outward-opening doors, additional safety measures must be implemented.
Series designation: The number indicates the profile section height in millimeters; for example, the 70 series means a profile thickness of 70 mm.
Wall thickness requirements
Window profile wall thickness shall be ≥1.4 mm, and door profile wall thickness ≥2 mm; profiles thinner than these specifications are prone to deformation. For high-rise buildings or coastal areas, it is recommended to use thicker profiles to enhance structural strength.
II. Compatibility Between Opening Dimensions and Operation Method
Standard size range
Windows: Residential window heights typically measure 1.5 m (with a windowsill height of 0.9 m), and window widths start at 0.6 m, increasing in 300-mm increments (e.g., 0.9 m, 1.2 m).
Doors: Single-leaf swing doors shall have a width ≤900 mm and a height ≤2400 mm; sliding doors shall have a width ≤2000 mm and a height ≤2200 mm. Any dimensions exceeding these limits shall require structural reinforcement.
Activation Method Restrictions
Sliding windows: the width of a double-leaf window shall not exceed 2,100 mm, and the height shall not exceed 1,500 mm; sliding windows are not recommended when the opening width is less than 600 mm.
Casement windows: single sash width ≤ 600 mm (for insulated glass, ≤ 550 mm); outward-opening windows must be equipped with fall-prevention measures.
III. Environmental and Performance Requirements
Wind Pressure Resistance and Sealing
In areas with high wind pressure (such as coastal regions), select larger-profile series (e.g., the 90 series) and reinforce the joint detailing.
When tight sealing is required, casement windows should be prioritized; for sliding windows, all necessary accessories such as impact guards and weatherstripping must be installed.
Thermal insulation
In northern regions, it is recommended to use thermal-break aluminum profiles and insulated glass units (e.g., 5+12A+5) paired with EPDM weatherstripping.
IV. Installation and Acceptance Standards
Installation Specifications
The use of nail guns is prohibited for attaching door and window frames to the wall; expansion bolts must be used instead. When installing the subframe, sealant must be applied to prevent water infiltration.
Vertical deviation ≤ 2.0 mm, horizontal deviation ≤ 3.0 mm.
Acceptance Key Points
Inspect for color variation and flatness; the color of each individual profile should be uniform.
Hardware components must operate smoothly and flexibly, and the load-bearing capacity of sliding window pulleys must meet the specified standards.
V. Precautions for Special Scenarios
Children’s rooms/low window sills: When the window sill height is less than 0.8 m, a guardrail must be installed.
Bathroom/Kitchen: Optional 0.6×0.9 m small window, paired with moisture-resistant profiles.
Summary and Recommendations
Customized measurement: Precisely measure the opening dimensions and allow for installation clearance (5–10 mm on each side).
Performance first: Select materials based on the climate (e.g., prioritize moisture resistance in the south and thermal insulation in the north).
Compliance: Adherence to national standards such as “Aluminum Alloy Doors and Windows” (GB/T 8478).
By comprehensively evaluating the above factors, aluminum alloy doors and windows can be ensured to deliver functionality, safety, and aesthetic appeal. When selecting specific models, it is recommended to consult with a professional manufacturer and provide architectural drawings to optimize the design.
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