Velux Deck Mounted Skylights As the world standard for over 60 years, Velux deck mounted skylights, coupled with Velux step flashing kits, offer you the best, most watertight installation method available. Great for all climatic regions of the United States, deck mounted skylights are particularly well suited for areas where ice, snow and freezing rain are prevalent. Velux deck mounted skylights are the only skylights available for combi applications. Deck mounted skylights combine an insulating glass lens, a wood frame and protective cladding into one unit that is mounted directly to the roof deck. Flashing kits are available for most roofing materials like asphalt shingles, metal roofing and tile. Blinds and controls and copper cladding are also available.