Clay-, concrete- and slate-tile hooks in tempered stainless align with rafters using telescopic slots, ensuring a watertight seal under UV-stable EPDM pads. For trapezoidal metal sheets, aluminium clamps with vulcanised rubber bases preserve panel warranties while achieving pull-out strength above 3 kN per fastener. Flat-roof ballast frames accept 60 to 80 mm pavers and tilt modules from 10° to 15° with integrated wind deflectors. All systems hold DIN EN 1991 and ETN certifications, making design approval straightforward for Latvian code officials.