Quick Answer
Okay, so here's the quick version. If you're hearing scratching or scurrying noises in the attic, you've probably got unwelcome guests. The biggest signs are rodent droppings, tunnels in your insulation, and gnaw marks on wood or wires. The fix? It’s a three-step dance: inspect to find how they're getting in, seal up every single entry point (this is the most important part!), and then trap the ones already inside. You can DIY the trapping for maybe $20-$100, but a professional exclusion and removal job will run you anywhere from $500 to $2,500+, depending on the extent of the infestation and damage, possibly more if extensive cleanup is needed.
Common Symptoms
Possible Causes
Step-by-Step Diagnosis
Step 1
Safety First: Gear up with an N95 mask, gloves, and a good headlamp.
Step 2
Initial Check: Pop the attic hatch and just listen and smell for a moment before entering.
Step 3
Perimeter Sweep: Carefully inspect the edges of the attic for droppings and tunnels in the insulation.
Step 4
Follow the Trails: Trace the rodent runways back to discover potential nests and entry points, especially around vents and utility penetrations.
Step 5
Damage Assessment: Look closely for gnaw marks on wooden beams, PVC pipes, and especially electrical wiring.
DIY vs Professional Costs
| Repair Type | DIY Cost | Professional Cost | Time Required |
|---|---|---|---|
Trapping & Removal | $20 - $100 | $250 - $600 | Ongoing |
Exclusion (Sealing Holes) | $50 - $200 | $500 - $2,500+ | 4-8 hours |
Attic Cleanup/Decontamination | N/A | $1,500 - $5,000+ | 1-3 days |
When to Call a Professional Pest Control
- If you discover any chewed electrical wires - call an electrician immediately, then pest control.
- If the infestation is large, indicated by a strong odor and visible droppings.
- If you've been trapping for several weeks with no end in sight, as this means you haven't found the entry point.
- If you're not comfortable getting on a ladder or on your roof to perform exclusion work safely.
- If the problem involves larger animals like squirrels or raccoons.
Prevention Tips
- Seal every gap on your home's exterior larger than a dime using steel wool and sealant.
- Trim all tree branches at least 6 feet away from your roofline.
- Store all trash and recycling in sealed bins and don't leave pet food outside.
- Avoid ineffective gimmicks like ultrasonic repellents and rely on exclusion.
Frequently Asked Questions
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