Velux. In a series of upgrades to its deck-mounted skylight product line, the maker’s No Leak Skylight features a “Deck Seal” that provides an air and water barrier for leak-proof installation. The 1¼-inch flange/bracket sits directly on the roof deck, eliminating gaps to keep out water. An adhesive underlayment and pre-engineered flashing system further ensure that joints are watertight and that any water is moved down and away from the opening. Mounting brackets are attached at the factory, helping save contractors time during installation. 800.888.3589.