GravityLock secures the grid to the support and GravityCross creates uniform, visually attractive 4 mm joints, ensuring optimal stability and easy maintenance even in high wind conditions. GravityLock + GravityCross are accessories designed to make the GravitySystem windproof, ensuring optimal stability even in strong winds. GravityLock firmly secures the grid to the support, while GravityCross creates uniform, visually attractive 4mm joints, facilitating installation. The system design means they can be easily released, allowing the underlying surface to be inspected at any time without the need for demolition and without compromising the substructure, thus facilitating ongoing maintenance.