I. Core Selection Criteria: Focus First on Quality Indicators
The durability and user experience of aluminum alloy windows and doors fundamentally depend on the base material and core structure. The following four aspects are key:
Profiles: Material, Thickness, and Craftsmanship
Material: The first choice should be 6063-T5/T6 aluminum alloy, a standard-grade profile used specifically for windows and doors. It offers high strength and toughness, withstanding frequent opening and environmental impact. Avoid recycled aluminum, which contains impurities, deforms easily, and may cause frame cracking over time.
Thickness: Must meet national standards — not less than 1.4 mm for casement windows and 1.2 mm for sliding windows. For high-rise buildings or large window spans (over 1.2 m per sash), select 1.6–2.0 mm wall thickness to enhance wind resistance and prevent shaking.
Craftsmanship: Prefer thermal break aluminum profiles (using PA66 nylon insulation strips in the middle). Compared with ordinary aluminum, these improve heat and sound insulation by over 50%, adapting to temperature differences between northern and southern regions. For surface finishing, choose powder coating (scratch-resistant, fade-resistant, rich color choices) or electrophoretic coating (smooth texture, high corrosion resistance). Avoid ordinary paint coatings, which peel easily and lack durability.
Glass: Match Precisely to Functional Needs
Basic Configuration: Choose insulated glass (double glazing with argon gas) — offering over 30 dB better sound insulation than single-pane glass, ideal for homes near streets or elevators. For colder northern regions or households emphasizing insulation, use Low-E insulated glass (low-emissivity coated), which blocks over 80% of UV rays, reduces heat transfer, and lowers energy use.
Special Scenarios:
High-rise buildings or families with children: Choose laminated insulated glass (PVB interlayer between glass panes) — even if broken, it won’t shatter, ensuring higher safety.
Bathrooms or bedrooms: Choose frosted insulated glass or smart electrochromic glass, balancing natural light with privacy.
Coastal areas: Use tempered insulated glass to resist salt spray corrosion and withstand typhoon impacts.
Recommended Specifications:
Standard homes: 5+12A+5 (two 5 mm panes with a 12 mm air gap) — sufficient for sound and heat insulation.
Noisy or high-temperature-difference regions: Upgrade to 5+20A+5 or triple glazing (5+12A+5+12A+5).
Hardware: Durability Lies in the Details
Hardware is the “heart” of the window or door, directly affecting smoothness of operation and security. Choose 304 stainless steel or zinc alloy hardware (corrosion-resistant, rust-proof) and avoid iron fittings (which oxidize and jam easily).
Casement Windows: Focus on hinges, handles, and locking points. Use heavy-duty hinges for sashes over 50 kg, and multi-point locking handles for better sealing.
Sliding Windows: Pay attention to tracks and rollers — select stainless-steel ball-bearing tracks paired with nylon rollers for smooth, quiet movement and strong load-bearing.
Recommended Brands: Opt for well-known domestic and international brands such as HOPPE, Siegenia (Germany), Jianlang, or Chunguang (China) for reliable quality and better after-sales service. Avoid unbranded or small factory products that are prone to damage and difficult to replace.
Sealing Performance: Check Sealing Strips and Structural Design
Sealing Strips: Choose EPDM (ethylene-propylene-diene) rubber, which withstands -40 °C to 120 °C, resists aging, and ensures long-lasting airtightness. Avoid PVC strips, which harden and crack over time.
Structure: Prefer multi-cavity profiles (internal hollow chambers) combined with a triple-sealing design (frame seal, glass seal, hardware seal). This effectively blocks rain, dust, and drafts, improving both air and water tightness.
II. Scenario-Based Adaptation: Choose According to Region and Application
Since China’s regions differ greatly in climate and living conditions, aluminum alloy window and door selection should be location-specific and need-driven.
By Climate Zone
Southern Humid & Rainy Regions (e.g., Guangdong, Fujian):
Prioritize waterproofing and corrosion resistance.
Use electrophoretic or fluorocarbon coating (excellent humidity and corrosion resistance).
Choose structures with hidden drainage holes to prevent rainwater backflow.
Use insulated glass to prevent condensation.
Ensure sealing strips are fully fitted to prevent water leakage.
Northern Cold & Windy Regions (e.g., Beijing, Northeast China):
Focus on thermal insulation and wind resistance.
Must use thermal break aluminum profiles with PA66 insulation strips at least 20 mm wide.
Pair with Low-E insulated glass for enhanced insulation.
Choose wall thickness ≥ 1.6 mm.
Seal gaps between the frame and wall with foam + silicone double sealing to minimize cold air infiltration.
Coastal Salt-Mist Areas (e.g., Zhejiang, Hainan):
Prioritize anti-corrosion and typhoon resistance.
Use fluorocarbon-coated profiles (highest salt resistance).
Select 316 stainless steel hardware (superior to 304 in salt corrosion resistance).
Use tempered laminated insulated glass for impact resistance.
Avoid exposing ordinary aluminum directly to salt air.
By Residential Space
Living Room (Scenic View + Natural Light):
Choose a large-size, high-transparency design.
Use ultra-slim thermal break aluminum frames (30–50 mm border width).
Pair with large single glass panels (e.g., 2 m × 3 m ultra-clear insulated glass) to minimize divisions and maximize views.
For operation, choose casement windows or folding doors — they provide a wide opening and excellent