Step 7: Counterflash The Sides

install watertight skylight cover step flashing with counterflashing to keep out elements
Photo: Anthony Tieuli
«»
Cover the vertical legs of the step flashing with strips of counterflashing—they snap right onto the rim of the skylight. Counterflashing is the key to sealing out wind-driven rain and snow.
Ask TOH users about Windows

Contribute to This Story Below

    Tools List

    • fall protection harness
      Fall-protection gear
    • chalk line
      Chalk line
    • drill
      Drill/driver
    • circular saw
      Circular saw
    • hammer
      Coil roofing nailer or a hammer
    • snap-off utility knife
      Utility knife

    Shopping List

    1. Skylight kit (includes counterflashing)

    2. Flashing kit (includes self-adhesive membrane; step, saddle, and sill flashing)

    3. Deck screws

    4. Extra roofing shingles

    5. 1½-inch galvanized roofing nails