French quality mark obtained for Blustyle items, based on the tests envisaged by the 14411 European standard and by the technical Cahiers of the CSTB. Each item is assigned a class establishing that it is suitable for installation in the indicated environment of destination. Certified products and the relative classements are indicated in the following certificate.

Technical characteristics are grouped into 4 classes, identified by the initials of UPEC. Beside each class, there is a number. The higher the number the better the characteristics of the product:
U – Wear from pedestrian traffic (2, 2s, 3, 3s, 4)
P – Mechanical resistance to static or dynamic loads (2, 3, 4, 4+, 4s)
E – Reaction to water (0, 1, 2, 3)
C – Resistance to aggressive chemicals or staining agents (0, 1, 2, 3)