Step 4: Cut rough opening from inside

cut out the rough opening with a reciprocating saw
Photo: John Nasta
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From inside, cut out the rough opening with a reciprocating saw. Guide the blade along the rafters for the side cuts, then remove the severed plywood or roof sheathing to expose the rough opening.
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    More in House Exterior

    Tools List

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    • 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

    Close
    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