The key is follow Install Details. • How do I determine quantity of screws required? See Screw Counting Base & Cap System.• Where is Aluminum Tape used? Each detail will indicate use of tape, if required. The key is follow Install Details. Same for Flashing Tape.• I do not see vent tape in your drawings? Vent tape is typically used in U-Profiles of plastic that, not only yellow, but also fit loosely. Without vent tape these plastic U-Profiles allow bugs to enter. Our U-Profiles fit tight, vent tape not required. It is important to access our drawings and following these drawings carefully, should you choose to use our Install Systems. Using our components and misc. instructions from others will clearly lead to problems. No other company goes to the length we do to ensure a successful installation. Follow our guidelines to the letter and we ensure a quality installation. Plastic install components are junk. Aluminum will last, and you have a choice of colors.• Where do I use silicone? Each detail will indicate use of tape, if required. The key is follow Install Details.• How do I determine quantity of silicone required? One tube of silicone will produce 25 linear feet of 1/4″ x 1/4″ silicone bead. We sell clear, plastic compatible, 100% silicone.