How to Frame a Soffit

If you're building a house or an addition and have reached the point where the walls and roof are framed, it's time to frame the soffits. A soffit is built out from the ends of the roof rafters and the tops of the walls where they meet the rafters. This gives you a place to install attic vents. Here's how to frame a soffit.

Things You'll Need

  • Measuring tape
  • 2-inch by 4-inch boards
  • Circular saw
  • Nails
  • 1/2-inch plywood
  • Table saw
  • Safety goggles or glasses

Instructions

    • 1

      Determine how long you want the soffit to be by measuring from one end of a wall to the other along the point where the top of the wall meets the roof rafters. Cut a 2-inch by 4-inch board to the length you measured.

    • 2

      Nail the board, called a ledger, into the wall studs along the entire length of the wall. Make sure the top of the ledger is butted up against the rafters.

    • 3

      Measure from the face of the ledger board to the end of a rafter. Cut a 2-inch by 4-inch board to the measured length. Place one end against the ledger board and make sure the other end is flush with the end of the rafter.

    • 4

      Attach the short board to the rafter and toe-nail the end into the ledger board. Repeat this process along all the roof rafters across the entire length of the wall.

    • 5

      Cut a 1/2-inch sheet of plywood to a width that covers between the ledger board and the ends of the rafters. Make vent holes between every other roof rafter. Nail the plywood into place. Your soffit is now framed, and you're ready to finish it with whatever exterior siding you want.

Tips & Warnings

  • Always wear safety goggles or glasses when cutting wood.
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