Step 8: Install The Saddle Flashing

install watertight skylight install saddle flashing
Photo: Anthony Tieuli
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Lift the first course of shingles above the skylight, slit the underlayment (the sheeting under the shingles), and slip the saddle flashing's top edge up through the slit. Fit the flashing against the skylight, lift the shingles, and nail the flashing at its top corners. Nail a final course of shingles over the flashing, leaving 4 inches of it exposed.
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    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