How to Keep Mice Out of Your Home Without Poisons
Mice look for food, warmth, and small openings. I do not start with poison. I start by sealing entry points, cutting off food sources, and using deterrents only after the house is harder to enter. This guide comes from work I have done on my own home and from the steps I recommend when people ask me where to begin. And in all honesty? I recommend beginning with a cat.
Tools I think you’ll want
Gear that matches what this guide talks about. Amazon affiliate links: same price for you, and purchases help me keep adding to the site.
Copper mesh
Copper mesh can block larger gaps until you make a permanent repair.
id: copperMesh
View on AmazonPecute Expandable Pet Carrier
Personally, I think a cat is the best solution. No poisons, no mess, and constant deterrence. You will need a carrier when you go get yours.
id: catCarrier
View on AmazonHumane Mouse Trap Indoor for Home
If you prefer it, you can try a humane trap. I did not have a lot of success with them.
id: catchAndRelease
View on Amazon
Want help with pest control? Use the form below.
Get HelpKey Takeaways
- Sealing holes matters more than sprays or bait if you want them gone for good.
- A mouse can fit through a gap about the size of a dime.
- Peppermint and similar products help only after you block the holes.
- Poison-free work is safer if you have kids, pets, or wildlife nearby.
Why mice show up in houses
Most of the time, mice come in because they find a gap and something to eat. Older homes often have gaps at the foundation, garage, or places where pipes and wires enter. Newer homes can still have missed spots at the siding or under doors. Cold weather also pushes mice indoors because they are looking for warmth.
Find and seal small entry points
Walk the outside of the house and look at the foundation, corners, vents, and where utilities go through the wall. Inside, check the basement, garage, kitchen, and anywhere pipes come through the floor or wall. Stuff copper mesh into small gaps, then seal over it with caulk or cement when you can. Steel wool can fill a bigger hole until you get a permanent patch in place.
Product I recommend
Copper mesh for stuffing gaps
You can use copper mesh as a temporary repair until an actual exclusion can be done. Actual exclusion probably looks more like carpentry and drywalling.
View on AmazonAs an Amazon Associate I earn from qualifying purchases.
Cut off food inside the house
Put grains, pet food, and snacks in containers with tight lids. Sweep and vacuum on a regular schedule, including the garage if you store pet food there. Take trash out and keep bins closed. This does not replace sealing holes, but it removes the reason mice stay once they are inside.
Product I recommend
Airtight food containers
Clear containers make it easy to see what you have and keep smells contained.
View on AmazonAs an Amazon Associate I earn from qualifying purchases.
Use deterrents after you seal
Some people use peppermint oil on cotton balls in cabinets or along baseboards. I treat that as extra help only after gaps are sealed. It will not fix a bad exclusion job on its own.
Product I recommend
Door seal
A gap around an exterior door is an easy fix and stops a lot of drafts and pests.
View on AmazonAs an Amazon Associate I earn from qualifying purchases.
Need help with pest control in General?
Share your contact details and we’ll follow up with guidance specific to your situation.
Frequently Asked Questions
Do poison-free methods work?
Yes, if you seal entry points and remove food. Poison can kill mice but it does not fix the hole the next one uses.
When are mice most active indoors?
In many regions they move inside more in fall and winter when it gets cold. You can still have problems any month if food and entry points are there.
Related guides
- Things I Wish I Knew Before Buying a Home in Loudoun CountyWhat we learned buying homes in Virginia, including who hires the inspector, when to bring in roof, pool, and HVAC specialists, and what DIY work can cost after closing.
- Things I Wish I Knew Before Selling an Old HomeWhat we learned while listing an older home in Loudoun County, going through contracts that did not close, and renting the property instead.
Written by
Jesse HoweHomeowner and writer behind Howe's Guide, with experience buying, selling, maintaining, and repairing homes in Northern Virginia.
- Homeowner in Northern Virginia
- Experience buying homes in Loudoun County and Frederick County
- Hands-on home maintenance and pest-prevention experience