Advice
Signs of Mice in the House: What to Look For
Mice are small, secretive and mostly active at night, so the first clues are usually droppings, gnaw marks and faint sounds rather than a sighting.
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Mice can pass through surprisingly small gaps, so understanding their usual entry points is the first step towards keeping them out of your home or business.
Many people assume a mouse problem means a dirty house, but the real question is usually how the animals got in. Mice are agile climbers and flexible enough to squeeze through a gap not much wider than a pencil. Once they find a way in, they can travel through wall cavities, under floors and across lofts without being seen.
Dealing with the mice already inside, without finding and closing the entry point, only solves half the problem. Others can follow the same route later, which is why proofing matters as much as removal.
In Devon homes we find mice using the same handful of routes again and again. Older cottages and farmhouses have more gaps where stone, brick and timber meet, but modern houses have their own weak spots, usually where services pass through the walls.
Check these places first, preferably with a torch and in daylight.
Mice follow food and warmth. A bin left open, a pet bowl left out overnight or a compost heap beside the back door can bring them right up to the building. Hedges, climbing plants and stacked wood give them cover as they approach.
Seasonal changes play a part. When the harvest is cleared and the weather turns colder, mice look for somewhere dry and sheltered. Holiday lets and second homes are often targeted while empty, since quiet rooms with stored food and bedding suit them very well.
You can make a real difference with simple jobs around the outside of the property. Walk the perimeter, note any gaps or damage, and repair what you can reach safely from the ground. Fine metal mesh and hard-wearing filler are often used to close small holes, because mice can chew through soft materials.
Inside, keep food sealed and tidy up crumbs. Do not attempt roof work or ladder work without proper equipment, and leave anything high up to a professional.
Do not simply plug holes while you can still hear mice moving about inside. If the animals are sealed in, they may chew new routes through plasterboard, insulation or cables, causing more damage than before. Check that the activity has stopped before you close every gap.
Avoid putting down poison to solve the problem. It risks harming pets and wildlife, and a mouse that dies in a hidden space can cause a lingering smell. Do not use expanding foam on its own either, as mice often gnaw straight through it.
If you cannot find how mice are getting in, or you can hear them in the walls or loft, it is time to call us. We look at the whole building, including roof lines, eaves and areas that are difficult to reach safely, and we can tell the difference between old gaps and current routes.
We then deal with the mice and advise on proofing, so the treatment is not undone by an open door in the next wall. This is especially useful for older stone buildings, thatched properties and larger commercial premises where there are many possible entry points.
Prevention is a habit rather than a one-off job. Check the outside of your property twice a year, especially before the colder months, and repair any new cracks or damage promptly. Keep vegetation trimmed back from the walls so mice have less cover.
Good housekeeping completes the picture. Store food in sealed containers, clear spills quickly and avoid leaving pet food out overnight. If you own a holiday let, make sure cleaners and guests know to report any droppings or noises straight away.
A mouse can get through a gap roughly the width of a pencil, because its skeleton is flexible and it can compress its body. That is why even tiny cracks and cable holes are worth sealing. If your finger fits through a gap, a mouse almost certainly can too.
Yes. Mice are good climbers and can scale rough brickwork, pipes, climbing plants and cables to reach eaves and roof spaces. This is why gaps high up on a building matter as much as those at ground level.
Mice will often look for another way in, or chew through weak materials. If the original reason they were attracted, such as food or shelter, has not changed, they will keep trying. Using hard-wearing materials and removing food sources makes a lasting difference.
Small gaps at ground level are fine for most people to seal. Work at height, roof spaces and anything involving the structure is better left to a professional. Always make sure no mice are trapped inside before you close up a hole.
If you would like a professional to look at the problem, call us on 01392 590 140 or send an enquiry.
Mice are small, secretive and mostly active at night, so the first clues are usually droppings, gnaw marks and faint sounds rather than a sighting.
Read the guide →Pests follow the seasons, and knowing what to expect in each part of the year helps Devon householders spot problems early and act at the right time.
Read the guide →Call us, message us on WhatsApp or send an enquiry. We will agree the price with you before any work starts.