The JI Shield Built-up System Wall Vertical 4 gives a warranted metal wall system which features a 0,50 mm outer and 0,40 mm liner. This assembly provides a highly cost-effective wall system that is ideal for all types of commercial construction. The full build-up results into an outstanding thermal, fire and acoustic system performance. The JI Shield Built-up System Wall Vertical 4 differentiates itself by the slim sinusoidal outer sheet.