Quick Answer
If it's scratching, gnawing, and scurrying all night long, that’s rodents—mice, rats, or potentially a nocturnal squirrel. Bats leave crumbly droppings in piles, and rodents leave scattered small, hard pellets. The fix involves identifying and sealing entry points (after the animals have left).
Common Symptoms
Possible Causes
Step-by-Step Diagnosis
Step 1
Note the time of day you hear noises: dusk/dawn for bats, all night for rodents.
Step 2
Perform a 'dusk watch' outside to see if bats emerge from the roofline.
Step 3
Safely inspect the attic for the type and location of droppings (piles vs. scattered).
Step 4
Check droppings: bat guano crumbles, rodent droppings are hard.
Step 5
Look for chewed wires, torn insulation, or nests (signs of rodents).
Step 6
Inspect the home's exterior for entry holes, gaps, and greasy rub marks.
DIY vs Professional Costs
| Repair Type | DIY Cost | Professional Cost | Time Required |
|---|---|---|---|
Minor Rodent Sealing & Trapping | $25-75 | $400-800 | 2-4 hours |
Bat Exclusion & Guano Cleanup | N/A | $800-2500+ | 4-8 hours |
Major Wildlife Removal & Repair (Raccoons, etc.) | $50-150 | $1000-5000+ | Varies |
When to Call a Professional Pest Control
- If you suspect you have bats—it's not a DIY job.
- If you hear heavy thumping or signs of a large animal like a raccoon.
- If the infestation is large, with a significant amount of droppings.
- If you've tried DIY methods and the pests keep coming back.
- If you're not comfortable working on ladders or in tight, hazardous attic spaces.
Prevention Tips
- Trim tree branches at least 6-10 feet away from your roof.
- Seal all gaps larger than a quarter-inch on your home's exterior with steel wool and caulk.
- Install a secure cap on your chimney.
- Make sure all attic and dryer vents are properly screened and intact.
- Secure trash can lids and don't leave pet food outside.
Frequently Asked Questions
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