As Michigan temperatures drop, mice and rats desperately seek warm shelter – and your home looks very inviting. Fall is the critical time to rodent-proof your property before these pests move in for winter. Here’s a comprehensive guide to keeping mice and rats out of your Novi home.
Why Fall is Critical for Rodent Prevention
Rodents don’t hibernate. When outdoor temperatures fall below 40°F, mice and rats actively seek shelter. In Michigan, this typically means September through November is prime invasion time. By the time you see evidence of rodents inside, they may have already established nesting sites.
The stakes are high: a single female mouse can produce 5-10 litters per year, with 6-8 babies per litter. One mouse in October can become a major infestation by spring.
Inspect for Entry Points
Mice can squeeze through gaps as small as a dime (1/4 inch), and rats through quarter-sized holes. Conduct a thorough inspection of your home’s exterior:
Common Entry Points to Check
- Foundation cracks and gaps
- Gaps around pipes, wires, and cables entering the home
- Spaces under doors (look for daylight)
- Damaged or missing door sweeps
- Gaps around garage doors
- Holes in screens and vents
- Spaces where siding meets the foundation
- Gaps around window and door frames
- Chimney openings
- Dryer vents and exhaust fans
- Where utility lines enter the house
Seal Entry Points Properly
For Small Gaps (Under 1/2 Inch)
Use steel wool or copper mesh stuffed into the hole, then seal with caulk. Rodents can’t chew through metal.
For Larger Holes
Use hardware cloth (1/4 inch mesh) secured with screws, then seal edges with caulk. Never use expandable foam alone – rodents chew right through it.
For Gaps Under Doors
Install sturdy door sweeps on all exterior doors, including the garage. Check them annually and replace when worn.
For Vent Openings
Cover with hardware cloth while ensuring proper airflow is maintained.
Eliminate Food Sources
Rodents come inside for food as well as shelter. Reduce attractants:
- Store all dry goods (cereal, pasta, rice, flour) in glass or metal containers with tight lids
- Don’t leave pet food out overnight – pick up bowls after feeding
- Store pet food in sealed metal containers, not the original bags
- Clean up crumbs and spills immediately
- Take out garbage regularly and use cans with tight-fitting lids
- Don’t leave fruit on counters
- Clean under and behind appliances
- Empty sink drains of food debris
Reduce Harborage Areas
Make your property less attractive to rodents before they come inside:
- Store firewood at least 20 feet from the house and elevate it off the ground
- Trim shrubs and bushes away from the foundation
- Remove leaf piles and debris near the house
- Clean up fallen seeds under bird feeders (or remove feeders in fall)
- Store grass seed, bulbs, and other attractive items in sealed containers
- Organize storage areas to minimize hiding spots
- Elevate stored items off the floor
Don’t Forget the Garage
Attached garages are common rodent entry points:
- Install weather stripping around the garage door
- Seal gaps where the garage meets the house
- Store birdseed and grass seed in sealed metal containers
- Clean up spilled liquids (antifreeze is sweet and attracts rodents)
- Organize and declutter to eliminate hiding spots
Address Moisture Issues
Rodents need water as well as food and shelter:
- Fix leaky faucets and pipes
- Address condensation issues
- Ensure proper drainage away from the foundation
- Don’t leave water standing in sinks overnight
- Keep pet water bowls inside at night
Set Up Early Detection
Even with prevention, monitor for signs of rodent activity:
- Place snap traps in the garage, basement, and attic to catch the first invaders
- Check traps weekly
- Watch for droppings, gnaw marks, or scratching sounds
- Look for grease marks along walls
When to Call Professionals
If you’ve taken prevention steps but still see evidence of rodents, or if you’re dealing with an existing infestation, professional help is needed. We can:
- Identify entry points you may have missed
- Implement strategic trapping programs
- Provide professional-grade exclusion
- Monitor and follow up to ensure success
Don’t let rodents set up winter residence in your home. Take action now, before Michigan’s cold weather drives them inside. Call (248) 823-6214 today for a rodent inspection or professional exclusion service in Novi and surrounding areas!