The ALIPLAST® PERGOLA system is suitable for covering steel or wooden structures and is available in heat insulated curtain wall profile design. The drainage pieces can be fastened to the structure (eg. wood). The material of the filler boards can be 16, 20, 25 or 32mm thick poly-carbonate or one and multi-layered glass. The profiles are suitable for accepting dormer windows. The wooden or steel structured pergolas can be used for terrace build-ins and as glass accepting structure and drainage system of the winter-gardens.