|Don's Home Home & Garden Woodpecker Damage|
What I've done for large round holes is.|
1. Nail a tin can lid over it (Needs to be repainted)
2. Cut out a plug from a 1/2" pice of wood I had in the basement with a saber saw and glue it in.
You can spray CRC Minimal Expansion Foam Sealant in hole first to keep the plug from falling in.
Then use plastic wood to fill the gaps around the edges and paint.
Both of these solutions passed inspection when selling my home.
Other choices for large holes.* Caulk - Acrylic Latex is best. See the Caulk page.