We have developed this new construction top-mounted external venetian blinds specifically for new buildings and renovations, in which the venetian blinds can be discreetly integrated into the facade. The venetian blind is attached directly to the window and employed together with the window into the rough opening. The box can then be plastered inside and outside. NEW – Patented guide rail for flush mounting: In the area between the window and guide rail a plaster base board is also integrated. So the up driven external blinds are virtually invisible. You get the new construction top-mounted external venetian blinds with curled edge slats, flat slats and even with dimming slats.