What is a dilatation joint?

The dilatation joint is a joint that passes through each floor except the foundations and divides the entire building into smaller sections. This prevents various disturbances that may occur when volumetric changes occur. The width of the dilatation joint is closely related to the length of the dilatation compartment, or to the type of environment and temperature. Standard widths range from 5 to 10 millimeters. If the gap is narrower, it must be filled with asphalt board. If, on the contrary, it is wider, it should be provided with a flexible material covered with a steel strip or a wood or plastic strip.