Bats in Third-Floor Attic: Exclusion, Not Ultrasonics

Ultrasonics = Scam

No scientific support; they only repel money from your wallet.

Confirm Bats First

Rice-sized black droppings (guano) in one spot = bats. Use ICWDM → Animal Damage ID for photo key.

Only Legal, Permanent Fix

1. Install one-way exclusion devices (netting/tubes) over entry holes.
2. Seal all other gaps ≥¼ inch.
3. Time it: avoid maternity season (May–Aug) when flightless pups are inside.

Hire a Pro

Wildlife Control Operator (not pest control). Find via ICWDM → Professional Services.