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How to Attach Fascia Board to Roof Trusses

Fascia boards cover the ends of roof trusses where the joists and rafters meet at the edge of the roof. You’ll only need a few common tools on hand before learning how to attach fascia board to roof trusses. Homeowners who feel comfortable on a ladder and know how to use basic power tools can accomplish repairs to fascia boards.

Tools and Materials

    How to Attach Fascia Board to Roof Trusses

  • 1-inch thick pieces of 8-foot lumber or composite boards:
    You want lumber a little wider than the height of the joists. For example, use 1 x 6 boards to cover 2 x 4 joists or 1 x 8 boards to cover 2 x 6 joists. Select pine boards without cracks, splits, or open knots. Composite fascia boards made from epoxy resin and recycled wood chips and sawdust offer a rot-resistant alternative to pine. Expect to pay more for composite boards.
  • Miter saw
  • Carpenter’s square
  • Pencil
  • 2-inch finishing nails
  • Hammer
  • Nail punch
  • Painter’s caulk
  • Ladder

Instructions for How to Attach Fascia Board to Roof Trusses

  1. Remove old fascia boards including old nails that are sticking out.
  2. Starting at a roof corner, lift the first board into place and hold its top edge tightly against the bottom edge of the roof deck.
  3. Mark the place closest to the end of the board that aligns with the center of a joist.
  4. Use the carpenter’s square and pencil to put a straight line at the mark.
  5. Cut the board with a miter saw.
  6. Position the board against the trusses and nail it in place.
  7. Put at least 2 nails at both ends of the fascia board into the joists.
  8. Begin the next piece by placing it against the end of the first board where it ended in the middle of the joist.
  9. Repeat the process of how to attach fascia board to roof trusses until the entire roof edge is complete.
  10. Push the nail heads below the surface of boards with the nail punch.
  11. Seal all seams between fascia boards with painter’s caulk. A wet finger or rag will work well to wipe the caulk smooth.

Get Help with Roof Repair

Even if the directions for how to attach fascia board to roof trusses look manageable, other demands on your time could delay the project. When this is the case, consider outsourcing the job to PJ Fitzpatrick. We’ve worked on roofs in the Delaware Valley for decades. Contact us today for more information.

Need help with this project?

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