Legal and Regulatory Compliance: In the United Kingdom compliance with BS EN 1090 is a legal requirement for fabricators and contractors involved in the construction of steel and aluminium structures. It ensures that the structures being erected meet the necessary safety and quality standards.
 
Structural Integrity and Safety: BS EN 1090 ensures that the fabrication and assembly processes adhere to rigorous quality control measures, which in turn contribute to the structural integrity and safety of the finished structures. Adhering to these standards helps prevent structural failures and accidents that could lead to injuries, loss of life, and property damage. 

Quality Assurance: Customers can have confidence in the quality of the fabricated components and structures when working with a company that is BS EN 1090 certified. This standard mandates strict quality control procedures, including material selection, welding techniques, testing, and documentation, all of which contribute to a higher level of quality assurance. 

Risk Mitigation: By adhering to BS EN 1090, customers can mitigate the risks associated with poor-quality structures, which could lead to costly legal disputes, project delays, or even the need for expensive repairs or replacements.

BS EN 1090 is important to customers because it ensures that the structural steel and aluminium components used in construction projects meet stringent quality and safety standards. Choosing a company that is BS EN 1090 certified provides assurance that the fabricated structures will be of high quality, safe, and compliant with relevant regulations.