How to Find and Seal Mice Entry Points in Home (2024)

This page is a general guide on finding and sealing mice entry points around your home or structure. Follow this DIY guide and use the recommended products and we guarantee you will be successful in finding these mice entry points and preventing future infestations.

Dealing with mice can be overwhelming for any homeowner. Once indoors, mice will reproduce rapidly and spread harmful diseases that your family or pets could catch.

The most logical question for any homeowner would be is where are mice coming from and how to block these openings. Mice are experts at squeezing through the smallest of openings especially since they have flexible bones. This flexibility allows the mice body to contort to a smaller size.

Finding and sealing these entry points is just as important as getting rid of the rodent itself.Read on to learn how to find mice entry points in and around your home, including how to seal these entry points and prevent future mice infestations with the suggested products.

How to Find Entry Points of Mice

How to Find and Seal Mice Entry Points in Home (1)Mice are nimble and adaptable pests that exploit any openings around your structure as small as a dime. And because cracks, crevices, and other voids around your structures foundation, windows, and roof are inevitable there are numerous possible entry sources.

Armed with relatively large teeth and their incessant need to gnaw on solid objects to keep their incisors down, mice can create their own entry points. Commonly they will chew through wood, plastic, soft vinyl, rubber, drywall, concrete (if not cured properly), aluminum, or brick to enter.

To find their route, consider how a mice would behave. These rodents will want to travel in the shadows and move where they are not easily seen. They can also climb other surfaces such as walls, wires, or pipes to reach a new destination.

Signs of Mice

How to Find and Seal Mice Entry Points in Home (2)Aside from the hole itself, pay attention to other signs commonly left behind by this pest. Some common signs for mice are explained below:

  • The most obvious sign of a mice infestation is its droppings. House mice and deer mice droppings will measure to a quarter of an inch long similar to the shape and size of a grain of rice. They are dark to light brown colored with a smooth appearance. The difference between these pests is that house mice feces will resemble a rice grain and deer mice feces will be more pointed at the end.
  • Mice will gnaw on any soft materials they can find from paper, fabrics, cloth, wood, and electrical wiring. If you start to see packaged foods, curtains, furniture, clothing, and boxes with torn edges, rip or shredded bits, then this may suggest a mice problem. Even more so if you find gnawed wood in unfinished parts of your home like your basem*nt or attic.
  • Mice nests are not as elebarote as a birds, in fact they are not nest-like in appearance at all. These nests will be ball or dome-shaped with a single exit. The nest will be made out of paper, string, cardboard, fabric, sticks, wall insulation, and any other loose materials they can get a hold of.
  • These rodents have poor eyesight so they will stay traveling through the paths they know. Often, they will rub against the walls and objects in these paths. The longer they stick to these pathways the more you will see grease and dirt from their bodies along with their footprints.
  • Mice are nocturnal and mostly active at night, especially between dawn and dusk. Listen for scratching, squeaking, rustling, or scurrying sounds.
  • A musky or foul odor usually accompanies mice as they leave behind their waste.
  • Seeing the mouse itself, especially during the day, suggests a significant infestations. One mice is often a sign of a much larger infestation.

How to Seal Off Mouse Entry Points

After you have no longer noticed signs of mice, you can begin to patch holes used by these pests. You can learn how to get rid of mice in our professional DIY guide.

Insert Copper Mesh

How to Find and Seal Mice Entry Points in Home (3)

Seal any larger holes such as in homes foundation, weep holes, eaves, cracks, crevices, or voids with Stuf-Fit Copper Mesh.

Unlike other materials, Stuf-Fit Copper Mesh is stronger and provides an eco-friendly solution for mice control as these rodents cannot easily gnaw through it.

Apply Caulk

How to Find and Seal Mice Entry Points in Home (4)Use caulk to seal smaller voids or any other cracks and crevices in and around your structure from mice.

Keep in mind that mice can still chew or tunnel through caulk. However, by sealing these openings with caulk will deter mice from entering.

These rodents are looking for present openings so if there is not any available then will have little reason to chew or tunnel through.

Install Door Sweeps

Door sweeps or weatherstripping at the bottom of exterior doors around homes, garages, or sheds can prevent mice from entering through the gaps underneath.

Make sure these materials extend across the bottom of the door and that its fights tightly on both sides of the door.

Rubber or metal would be best the install in these sites as rodents cannot easily penetrate these materials.

Fix Large Gaps, Voids, or Other Openings

Repair and close larger openings with metal sheeting or cement as they are much harder for mice to chew through.

Install metal flashing around sites such as the base of exterior walls, lower edge of doors, and around pipes and vents.

Openings on the sides of concrete such as driveways or walkways should be repaired. Any other concrete sites with exposed cracks or crevices should also be addressed.

Seal Joints and Penetration

How to Find and Seal Mice Entry Points in Home (5)Rodents often travel through available joints and penetration in and around your structure. Maintaining these openings with a pest foam such as Solutions Sealator Pro Black Foam.

Solutions Sealator Pro Black Foam is a durable sealant foam formulated to perform even in cool weather conditions. Once dried, this foam will create an airtight seal that will prevent mice and other pests from entering.

Before applying any foam, ensure the treatment area is clean and clear. Brush away any dust and loose particles, and wipe away grease from the surfaces to be treated.

To install Sealator Pro onto your foam gun you will need to remove the lid.

Hold the gun upside down and quickly screw the canister onto the foam gun’s adapter.

Once the foam canister is connected, hold the gun upright and shake it up and down roughly 20 times.

Loosen the gun’s control knob and begin to apply foam by squeezing the trigger.

You can adjust the amount of foam applied by adjusting the control knob further and the amount of pressure you use to squeeze the trigger.

Once you’ve completed your application, apply cleaner to the gun’s tip and wipe dry.

Allow the foam time to expand and cure.

This product may be used to seal joints and penetrations, installation of window and door frames, and thermal and acoustic insulating.

Key Takeaways

How Do You Tell if a Hole is a Mouse Hole?

  • Mouse holes are often blocked with debris and will clear-cut. They will be about the size of a dime.

Why Do You Have Mice in Your House All of a Sudden

  • Cluttered living spaces, overgrown vegetation, change in weather, open-lid trash outdoors, and available food sources indoors will encourage mice to invade your home.

How to Find Where Mice Are Coming into your House

  • Look for any cracks, crevices, voids, or other small openings around the homes foundations, door and window frame, chimney, plumbing, and roof. These sites are commonly where mice will enter.

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