This European Standard specifies the equipment and procedures for determining compression behavior of test specimens. It is applicable to thermal insulating products for building application. It can be used to determine the compressive stress in compressive creep tests and for applications in which insulation products are only exposed to short term loads.

Place the test specimen centrally between the two parallel plates of the testing machine. Compress the test specimen with the movable plate at a constant speed of displacement which shall be d/10 per minute with a tolerance of ± 25 %, where d is the its initial thickness of the test specimen expressed in millimetres. Continue compression until the test specimen yields, providing a compressive strength value, or until a relative deformation of 10 % has been reached, providing a compressive stress at 10 % relative deformation.