How to Block Mice from Entering Under the Garage Door in Michigan

If you’re in Michigan and hearing scratching sounds in your garage, it’s not your imagination — it’s probably mice. These little rodents can squeeze through openings as small as 1/4 inch. That tiny gap under your garage door? It’s an open invitation. We have found one of the best ways to block mice under garage door Michigan handyman.

Especially during fall and winter, mice start seeking warmth, shelter, and food. The garage is usually their first stop. And once they’re in? They don’t stop at the garage — they work their way into the walls, attic, or even your car engine.

That’s where a handyman comes in to block mice under garage door Michigan homes are constantly dealing with. Let’s break down why it happens, how to fix it, and what a handyman does to mouse-proof your garage for good.

Why Mice Love Your Michigan Garage

Michigan winters are brutal — and mice don’t like the cold. Your garage offers everything they want:

• Shelter from freezing temperatures
• Darkness and insulation
• A quiet, undisturbed space
• Possible access to food (pet food, bird seed, trash)
• A jumping-off point into your home

Even if you keep your garage clean, a gap under the door is enough for them to get in and start nesting.

Signs Mice Are Getting In

Before sealing things up, you want to be sure mice are the problem. Here are the top signs:

• Droppings near the door edges or along walls
• Chewed cardboard, wires, or insulation
• Nesting materials (shredded paper, leaves)
• Scratching or rustling sounds, especially at night
• Faint ammonia smell (urine trails)

If you notice any of these, a handyman can block mice under your garage door and help stop the invasion before it spreads.

The Main Entry Point: Under the Garage Door

Most garage doors sit just above a concrete floor. Over time, the rubber seal — known as a garage door bottom seal — wears out or shifts, leaving a gap. Combine that with Michigan’s freeze-thaw cycle, and it’s a perfect entry point for pests.

Some homes also settle unevenly, creating a sloped or uneven concrete edge that lets daylight (and mice) through.

That’s where a handyman steps in.

How a Handyman Blocks Mice from Entering Under the Garage Door

Here’s how the job gets done right — no guesswork, no wasted trips to the hardware store.

1. Inspection of the Seal and Concrete Surface

The handyman begins by checking:

• The condition of your bottom rubber seal
• Whether the concrete slab is level
• If the door sits evenly when closed
• Any side gaps or chewed areas

This helps them determine what materials and methods will work best to mouse-proof the space.

2. Replacing or Upgrading the Bottom Seal

In many cases, simply replacing the garage door’s bottom seal will do the trick. But in colder Michigan homes, a handyman often recommends an upgraded heavy-duty seal like:

• T-style or bulb seals for larger gaps
• U-shaped seals for uneven floors
• Rodent-resistant seals with steel mesh inside

These prevent mice from chewing their way through — and they last longer in extreme weather.

3. Installing a Garage Door Threshold

If the concrete slab under the door is uneven or cracked, a handyman may install a garage door threshold seal. This is a rubber or vinyl strip that’s glued to the floor and forms a tight seal with the door. That’s why you want to find a block mice under garage door Michigan handyman.

It keeps out:

• Mice
• Water
• Dirt
• Cold drafts

Thresholds are especially useful in older Detroit or Michigan garages with worn-out slabs or tilted foundations.

4. Adding Side Seals or Brush Weather-stripping

If mice are squeezing in through the sides of the garage door, a handyman can install vertical seals or brush-style weatherstripping to fill in the gaps.

These don’t affect how the door opens and close smoothly with it. Plus, they help insulate your garage year-round.

5. Sealing Other Entry Points in the Garage

Blocking the garage door gap is key, but a smart handyman also checks for:

• Holes around utility pipes
• Gaps near the door leading into the house
• Cracks in walls or baseboards
• Gaps around windows or vents

They’ll fill these with steel wool, caulk, or spray foam — rodent-proof materials mice won’t chew through.

Why Hire a Handyman Instead of DIY?

Sure, you could try to slap a new rubber seal on yourself. But here’s where most DIY jobs fail:

• Seal doesn’t fit properly or leaves small gaps
• Door no longer closes flush
• Concrete isn’t prepped for adhesive
• Cheap seals get chewed through in months

A handyman has the experience, tools, and material know-how to do the job right the first time. And that means you avoid repeat infestations, chewed wires, or worse — a family of mice moving into your walls.

Cost to Mouse-Proof a Garage Door in Michigan

Here’s a ballpark breakdown:

• Seal replacement only: $100–$200
• Threshold seal installation: $150–$250
• Full mouse-proofing service (door + other gaps): $250–$500

Still cheaper than calling a pest control company every season — and better for your home in the long run.

Pro Tips to Keep Mice Out Year-Round

Once the handyman’s work is done, keep mice out for good with these tips:

• Don’t store pet food or bird seed in the garage
• Use sealed containers for dry goods and trash
• Keep the garage door closed at night
• Check and replace seals annually
• Install traps if you suspect activity inside

Prevention always beats extermination — and it’s a lot cleaner.

Michigan Winters Bring Rodents — Be Ready

In places like Detroit, Livonia, or Pontiac, mice start heading indoors as early as September. By the time snow hits, they’re nesting deep in homes, garages, and crawl spaces.

That’s why the block mice under garage door Michigan handyman solution is best handled before the temperature drops. If you’re seeing daylight under your garage door — or hearing scratching in the walls — take care of it now.