Aluminium Windows And Doors

6063-T5 or 6061 aluminum alloy is recommended. This type of 6 series alloy has good extrusion, corrosion resistance and surface treatment compatibility, and is the mainstream choice for door and window profiles. The thermal insulation aluminum profile needs to be matched with PA66 nylon insulation strips to separate the inner and outer aluminum layers to form an insulation thermal insulation structure. The heat transfer coefficient (K value) can be reduced to 2.0-3.0 W/(㎡·K), which is significantly better than the 3.5-5.0 of ordinary aluminum profiles. It should be noted that the wall thickness of the profile should meet the national standard (external windows ≥1.8mm, external doors ≥2.2mm), and avoid using 1 series pure aluminum or 2 series aviation aluminum with high cost.

During installation, the measurement error should be controlled to ≤2mm, the gap between the window frame and the wall should be 7-10mm on one side, and weather-resistant sealant should be applied after filling with polyurethane foam glue. Cement mortar is prohibited. Hardware accessories should be 304 stainless steel or imported brands (such as HOPPE) and pass the salt spray test. Drain holes should be reserved in the window frame to prevent water accumulation. The corners of the outer frame and the connection between the middle support should be sealed with glue. The wall joints should be filled with high-quality foaming agent. The thickness of the outdoor sealant should be ≥6mm.

The surface of the original aluminum profile is smooth and burr-free, while recycled aluminum is prone to impurities; the insulation strip must be made of PA66 (no burning smell), and PVC substitution should be avoided; the hardware must be smooth and not stuck, and the profile cross-section should be dense and free of bubbles. When purchasing, you need to pay attention to the heat transfer coefficient (K value ≤ 2.5 is preferred), air tightness level (national standard level 6 and above), and give priority to powder spraying or electrophoresis process (weather resistance up to 18-20 years).

Use soft cloth and neutral detergent to wipe, avoid acidic and alkaline solvents; clean the drainage holes regularly, check the flexibility of the hardware (lubricate once every six months); the sealing strips need to be replaced after aging to maintain airtightness. If the glass interlayer is fogged or the profile is deformed, you need to contact a professional for repair.

Aluminum alloy is 100% recyclable, and the production energy consumption is only 1/8 of that of plastic steel; it complies with the national standard GB/T 8478-2020 “Aluminum Alloy Doors and Windows” and the EU CE certification. Choosing water-based paint or powder spraying process can reduce VOC emissions, and Low-E glass can further reduce building energy consumption.

Glass configuration: double/triple insulating glass (such as 5+12A+5, filled with argon) or Low-E glass (reflects infrared rays, increases energy saving by 30%).
Sealing design: Use EPDM strips and multi-channel sealing structure to ensure air tightness and water tightness.

Profile: The surface of primary aluminum is smooth and burr-free, while scrap aluminum is prone to impurities; the insulation strip should be made of PA66 (no burning smell).
Hardware: Choose 304 stainless steel or imported brands (such as HOPPE, SIEGENIA), pass the salt spray test, and ensure smoothness without jamming.
Technology: The corners need to be sealed with glue, the profile section is dense and free of bubbles, and the glass needs to have the 3C certification mark.

Leakage at the corner of the outer frame: Apply elastic sealant to the 45-degree section before assembling the corner, and design a special insulation cavity connector to seal it with glue.
Leakage at the middle support connection: Use soft sealing film to buffer, and cooperate with the glue injection process to enhance the seal.
Leakage at the wall joint: Fill with high-quality foaming agent, and the thickness of the outdoor sealant is ≥6mm.