Things You'll Need
Instructions
Clean out the box. Remove all nesting materials and use water and a wire brush to scrub out the interior. For excrement stains, use a bleach solution of no more than 1 part bleach per 10 parts water. Let dry.
Inspect the box for weather damage, rot and evidence of predation, such as claw marks.
Determine if the damage is too extensive to last another season without repairs. Borderline extensive damage to the floor should be fixed so the nest remains well supported.
Remove the pieces of wood that need to be replaced. Use a screwdriver if the boards are screwed together, or a small crowbar and hammer if the boards are nailed together.
Trace the outline of the damaged pieces on an undamaged piece of wood with the same thickness.
Cut out the replacement piece.
Nail or screw the new piece into place, ensuring a snug fit.
Lightly sand any rough edges on the box, including the opening. Splintery or jagged openings can injure birds going in and out of the box.