How to Repair or Replace a Rotted Fascia Board

Fascia boards are the protective face of your roof line, shielding the rafter tails from the elements and providing a mounting point for your gutters. When you see soft wood, peeling paint, or drooping sections, the board has lost its battle against moisture. Ignoring this rot allows water to creep behind the fascia and reach your roof decking or structural rafters, turning a simple board swap into a significant framing repair. Done well, a fascia repair restores the structural integrity of your eaves and creates a clean, sealed surface that will last for years. You are looking for a tight fit against the sub-fascia and a flush alignment with the adjacent boards. Take your time during the removal to ensure you do not damage the drip edge, as that metal flashing is your primary defense against future water intrusion.

  1. Lower the Gutters Safely. Detach the downspouts first, then pry the gutter sections away from the fascia board. Use a drill to remove the gutter spikes or hidden hangers before gently pulling the gutter free.
  2. Peel Back the Flashing. Lift the drip edge flashing carefully using a flat pry bar. Locate the nails securing the rotted board and remove them, or use a reciprocating saw with a metal-cutting blade to slice through stubborn fasteners between the fascia and the rafter tails.
  3. Probe for Hidden Rot. Check the ends of the rafters for signs of rot or wood decay. If the rafter ends are soft, you must sister a new piece of lumber to the rafter before attaching the new fascia.
  4. Cut for a Snug Fit. Measure the distance between existing, healthy boards. Cut your new pressure-treated board to length, making sure to cut the ends at a 45-degree angle if you are joining it to an existing board at a corner.
  5. Nail It Home Tight. Lift the board into place and secure it to the rafter tails using two hot-dipped galvanized nails at every rafter. Ensure the top of the board sits snugly behind the drip edge.
  6. Seal Against the Weather. Apply a high-quality exterior caulk to the joints where the new board meets the old ones. Prime the wood with an oil-based primer and finish with two coats of exterior-grade paint.