Unlike traditional ground-level installations that rely on tarmac or MOT stone sub-bases, rooftop projects require a lightweight, cold-applied solution that’s easy to handle and install. DCM Surfaces offer several systems for constructing sub-base layers on roof terraces and podium decks, including Rubber-Gravel Mix (a SUDs-compliant material offering flexibility and drainage), Drainage Board filled with pea gravel to promote efficient water flow, and a Metal Tray System for a durable, structured finish.