Look at the profile:

  Choose the broken bridge aluminum profile made of primary aluminum, with a smooth surface and uniform color.

  Pay attention to the wall thickness of the profile. The national standard requires not less than 1.4mm. For high-rise buildings or those with high performance requirements, a thicker one can be selected.

Insulation strips:

  The material of high-quality insulation strips is generally nylon PA66, which is resistant to high temperature and not easy to age.

  Pay attention to the width of the insulation strips. Wider insulation strips usually have better insulation performance.

Sealing strips:

  Adopt high-quality sealing strips such as EPDM, with good elasticity and strong sealing performance.

  Check whether the installation of the sealing strips is tight and complete.

Hardware fittings:

  Choose hardware of well-known brands for smoother opening and closing and durability.

  Test the flexibility and load-bearing capacity of the hardware.

Glass:

  Choose the appropriate glass type according to the needs, such as insulating glass, Low-E glass, etc.

  Pay attention to the flatness of the glass and whether there are defects such as bubbles.

Brand and manufacturer:

  Give priority to choosing brands with good reputation and credibility.

  Understand the manufacturer's production process and quality control level.

Price:

  Don't simply pursue a low price. Too low a price may mean there are quality problems.

  Comprehensively compare the cost performance of different brands and products.

Installation and after-sales:

  Ensure there is a professional installation team to ensure the installation quality.

  Clarify the manufacturer's after-sales service policy and guarantee.