EN 824 is a European Standard that specifies the methods and procedures for determining the squareness of thermal insulation products used in building applications. The standard applies to insulation boards, slabs, or panels, and defines how to measure deviations from perfect rectangularity under controlled conditions.

Assessing the squareness of insulation products is used to ensure proper fit, accurate installation, and compliance with dimensional quality standards. Correctly squared boards or panels help maintain the intended thermal performance and facilitate smooth assembly in walls, roofs, floors, and other construction elements.

For more information about this test method, please visit the official DS (Danish Standards) website.