Seeing a rat run along the skirting board or across the kitchen floor is a shock, especially at night. The good news is that the next few steps are simple. Keep everyone safe, let the rat leave, then spend the next day working out how it got in and what drew it there. That second part is what stops it happening again.
In the first few minutes
- Keep children and pets out of the room. A frightened rat may bite if it feels trapped.
- Do not chase or corner it. Chasing pushes it deeper into the house, behind appliances or into wall gaps.
- Give it a way out. If the room has an outside door, open it and close internal doors so the exit is the obvious route.
- Note where it went. The direction it ran in is a strong clue to where it entered.
The same evening: remove what attracted it
Rats come indoors for food, water and shelter, and they return to places that provide all three. Before you go to bed:
- Put open food, fruit bowls and bread into sealed containers or the fridge.
- Wash dishes and wipe crumbs from counters and the hob.
- Empty the kitchen bin and keep the lid closed.
- Lift pet food bowls overnight. Our guide to pet food and rats explains why this matters.
- Fix dripping taps and wipe up standing water.
The next day: find the way in
Rats can squeeze through surprisingly small gaps, so look carefully. Walk the room the rat came from, then the rooms next to it, with a torch. Check:
| Where to look | What to look for |
|---|---|
| Under the sink and behind appliances | Gaps around pipes, cables and drain outlets |
| Doors and windows | Gaps under external doors, broken mesh, windows left open |
| Outside walls | Damaged vents or air bricks, holes near the ground, gaps around new cables |
| Drains and bathrooms | Loose drain covers, damaged pipe joints |
| Loft, false ceiling and roof | Droppings, chewed insulation, gaps at the eaves |
Along the way, look for droppings, greasy rub marks along walls, gnawed wood or packaging, and a musty smell. Our guide to finding a rat nest covers the signs in more detail, and how small a gap rodents can use explains why tiny holes matter.
Seal the gaps properly
Rats chew through soft materials, so foam filler or tape on its own rarely lasts. Use materials they cannot gnaw easily, such as steel wool packed into gaps and covered with sealant, metal mesh over vents, and door sweeps or brush strips under external doors. Fix damaged air bricks and drain covers. Our guide to rat-proofing your house goes room by room.
Clean up safely
If the rat left droppings or urine marks, avoid stirring up dust. Wear gloves, ventilate the room, spray the area with disinfectant and leave it to soak, then wipe it up with paper towels and bin them sealed in a bag. Do not sweep or vacuum dry droppings. The full method is in our guide to cleaning droppings.
Watch for signs over the next week
One sighting does not always mean an infestation, but it is a reason to keep an eye out. Over the following days, check the same places for fresh droppings, new gnaw marks or food packets that have been opened. Listen at night for scratching in walls or ceilings.
Call a professional pest controller if:
- you see rats again, especially during the day;
- you find droppings in several rooms;
- you hear scratching most nights;
- you find chewed wiring, which is a fire risk.
What not to do
- Do not scatter poison around the house. Poisoned rats can die inside walls and cause a strong smell, and poison is a risk to children and pets. Read why poison is a poor choice.
- Do not leave food out to see if it comes back.
- Do not ignore it because it was only one.
In short
Keep people and pets away, let the rat leave, and put food and water out of reach that same evening. The next day, find and seal the way in, clean up safely, and watch for further signs. If rats keep appearing, call a professional.
Once gaps are sealed, the EchoRepel Ultrasonic Rat Repellent adds a poison-free layer for kitchens and storerooms, filling the space with ultrasonic sound that rats and mice want to avoid.