Step 3: Place The Skylight

install watertight skylight place skylight in roof hole
Photo: Anthony Tieuli
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With a helper standing inside with the skylight, lift it up through the opening, rest its bottom edge against the sill, and lower the unit onto the roof, as shown. Drive 1¼-inch galvanized roofing nails through the holes in the skylight's flange and into the roof.
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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