Step 3: Install support frame

Drive nails through the plywood roof sheathing in each of the four corners of the rough opening
Photo: John Nasta
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Build a perimeter frame around the sill area with 2x4s. Drive nails through the plywood roof sheathing in each of the four corners of the rough opening. Then go outside onto the roof and carefully remove all the roof shingles from around the opening. Save the shingles for nailing back around the skylight after it's installed.
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    Tools List

    • 16-foot tape measure
      Tape measure
    • hammer
      Hammer
    • drill
      Drill-driver
    • drywall saw
      Drywall saw
    • reciprocating saw
      Reciprocating saw
    • drywall knife
      Drywall knife

    Shopping List

    1. Venting skylight with flashing kit

    2. 2x4s
    used to reframe sill

    3. 2x12
    used to form a header over the skylight

    4. 15-pound roofing felt

    5. Drywall
    used to cover the interior surfaces around the skylight

    6. Corner bead
    used to protect the drywall corners

    7. Joint compound

    8. Drywall tape

    9. 1 1/2-inch drywall nails
    used to attach corner bead

    10. 1/2-inch plywood
    used to create viewing shelf

    11. Primer and paint