How do I choose a reliable supplier of aluminum profiles for building construction?

To choose a reliable supplier of aluminum profiles for building construction, consider the following: Check their industry reputation and customer reviews. Ensure they have the necessary certifications and quality standards compliance. Evaluate their product range and quality, comparing different suppliers' offerings. Assess their delivery times and reliability. Consider their after-sales service and warranty provisions. Finally, get quotes from multiple suppliers and compare prices while ensuring quality is not compromised.