Mice in Your Garage? A GTA Winter Survival Guide

When winter hits the GTA, mice don't hibernate — they migrate indoors. Your garage, with its warmth and easy access, is often the first entry point. From there, it's a short trip through wall voids into your kitchen and living spaces.

Why Your Garage Attracts Mice

Garages are mouse magnets for several reasons:

Warmth — even an unheated garage is warmer than outdoors
Easy entry — gaps under garage doors, around pipes, and at foundation seams
Storage clutter — boxes and stored items provide nesting material and hiding spots
Food sources — bird seed, pet food, grass seed, or garbage bins

Signs of Mice in Your Garage

Small dark droppings (rice-shaped, 3–6mm) along walls and in corners
Gnaw marks on cardboard boxes, plastic containers, or wiring
Shredded paper, fabric, or insulation (nesting material)
Scratching sounds at night
A musty, ammonia-like smell from urine

DIY Prevention Steps

You can reduce the risk of mice entering your garage with these steps:

Seal gaps under the garage door — install a rubber weather seal or door sweep
Check for gaps around pipes and wires — seal with steel wool and caulk (mice can't chew through steel wool)
Store food in sealed containers — move bird seed, pet food, and grass seed to metal or glass containers
Reduce clutter — store items on shelves off the floor and use plastic bins instead of cardboard
Keep the garage door closed — especially at night when mice are most active

When to Call a Professional

If you're finding fresh droppings regularly, hearing scratching in walls, or have seen live mice, it's time to call a pro. A licensed technician will:

Identify all entry points (mice can fit through a 6mm gap)
Set up strategic trapping in high-activity areas
Seal entry points with rodent-proof materials
Provide follow-up monitoring to ensure the problem is resolved

Got mice in your GTA home or garage? Get free quotes from licensed rodent control experts in our network.