How to Repair Damaged Fascia With Epoxy


No matter how well they are sealed, wood fascia trim boards tend to rot along the corners due to water exposure. Replacing an entire trim board can be costly, especially when the damage is isolated to only a small portion of the fascia. Epoxy wood filler is ideal for repairing minor damage in wood, and it can save you a lot of money if you know the proper way to apply it. As with most home improvement projects, preparation will play a large role in determining success or failure.

Things You'll Need

  • Hammer
  • Die grinder with a core-box router bit
  • Moisture meter
  • Power drill
  • Borate wood preservative
  • Plastic syringe
  • Two part epoxy primer
  • 2-inch latex paintbrush
  • Two part epoxy filler
  • Paper towels
  • Plastic board
  • Plastic putty knife
  • Ascend an extension ladder to access the fascia trim board.

  • Claw out all of the rotting wood using the back of a hammer.

  • Grind down wood softened by rot with a die grinder.

  • Measure the moisture using the moisture meter. Grind down the wood again if the readout is greater than 18.

  • Drill at least three 1/2-inch deep holes into the damaged area of the fascia trim board.

  • Inject the wood preservative into the drilled holes using the syringe.

  • Brush on a two part epoxy primer using a 2-inch latex paintbrush. Apply it only to the damaged area, and wipe up any excess epoxy primer with paper towels. Allow the primer to cure for at least 15 minutes.

  • Mix the epoxy catalyst with the resin on top of a plastic board. Stir them together using a plastic putty knife.

  • Smear the epoxy wood filler into the damaged area of the fascia trim board using the putty knife. Mold the filler to match the shape of the rest of the trim board.

Tips & Warnings

  • Epoxy filler must be primed and painted as it will begin to disintegrate if exposed to direct sunlight. Do not wait longer than two days to apply primer and paint.
  • Epoxy filler is ideal for repairing minor damage to any wood trim around your home. However, if the damaged area is large, your best bet is to replace the wood.
  • If you need to repair simple cracks in damaged fascia trim, simply smear the epoxy wood filler into the damaged area and mold the filler to match the shape of the rest of the fascia trim.
  • Do not use an extension ladder until you have reviewed the safety guidelines printed on its side.

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  • Photo Credit the hammer image by Jim Mills from
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