8 Signs You Have Rats in Your Carlisle Home — And Exactly What To Do

Rats are more common in Carlisle homes than most people realise — particularly in older terraced housing, properties backing onto farmland, and anywhere near the River Eden. The problem is that by the time you see a rat, you have usually had them for several weeks. Here are the eight signs to look for, and exactly what to do if you find them.

Sign 1: Droppings

Rat droppings are the most common first sign of an infestation. They are dark brown, roughly the size and shape of a large grain of rice — about 10 to 15mm long and tapered at both ends. Mice droppings are smaller (around 5mm) and more pointed; if the droppings you find are closer in size to a grain of wheat, you may be dealing with mice rather than rats.

Where to check: under and behind kitchen units, along skirting boards, behind appliances such as washing machines and fridges, inside cupboards, and in loft insulation. Fresh droppings are soft and dark. Older droppings dry out, harden and turn grey. If you find fresh droppings, the infestation is active.

Sign 2: Gnaw Marks

Rats gnaw constantly because their incisor teeth never stop growing — chewing keeps them at a manageable length. This makes gnaw marks one of the most reliable signs of an active infestation.

Look for chewed edges on food packaging, gnawed corners on wooden skirting boards, bite marks on pipe lagging or cable insulation, and holes chewed through plasterboard or floor joists. Gnawed electrical cables are a particular concern — it is one of the leading causes of unexplained house fires in the UK. If you find chewed cabling, call a pest controller and an electrician.

Sign 3: Scratching or Scurrying Sounds

Rats are nocturnal, so the sounds you are most likely to hear will be at night once the house is quiet. Listen for scratching, scurrying or thumping sounds coming from between floors, inside walls, or in the loft. The sounds may move around, following the runs the rats have established.

Rats are noticeably louder than mice — a rat moving across a loft floor sounds more like a small cat than a mouse. If you can hear movement in the loft but it sounds very light and fast, you may be dealing with mice or even squirrels.

Sign 4: Smear Marks on Walls and Skirting

Rats follow the same routes every night, running close to walls and along the edges of rooms. Their fur naturally contains grease and dirt, which deposits in dark smudges along the surfaces they brush against repeatedly.

Look for dark, greasy smear marks at floor level along walls and skirting boards, around the edges of holes where pipes or cables pass through walls, and at the base of steps or anywhere they squeeze through a tight gap. Smear marks that feel fresh and slightly oily indicate an active infestation.

Sign 5: Burrows and Runs in the Garden

Brown rats commonly burrow in gardens, particularly under sheds, decking, compost heaps, tree roots and thick vegetation. Rat burrows are typically 6 to 9 centimetres wide with a smooth, clean entrance. There is often a small pile of loose earth beside the entrance hole.

You may also notice well-worn runs — narrow paths through grass, gravel or soil where the same routes have been used repeatedly. Properties near farmland, open fields or the River Eden have higher exposure to field rat pressure, particularly in autumn when harvest reduces outdoor food sources.

Sign 6: Nests

Rats build nests from shredded soft material — cardboard, newspaper, loft insulation, fabric, and similar. The nests themselves look like a rough ball of shredded material, usually in a hidden, warm location.

Common nest sites in Carlisle homes include underneath loft insulation, beneath floorboards, behind hot water tanks and boilers, inside wall cavities, and in the void under kitchen units. Disturbing a nest will cause the rats to scatter, so do not attempt to remove one without professional advice — you could drive them deeper into the building.

Sign 7: Footprints or Tail Trails

Rat footprints are rarely visible on normal household floors, but you can check for them easily. Sprinkle a thin layer of plain flour or talcum powder on the floor in an area where you suspect activity — along a wall, in a corner, or near a suspected entry point — and check it the following morning.

Rat footprints show four toes on the front feet and five on the back feet, with a continuous drag mark from the tail running between them. Mice leave similar prints but much smaller. Absence of prints after two or three nights suggests the area is not on an active run.

Sign 8: Actually Seeing a Rat

If you see a rat during daylight hours, treat it as a serious warning sign. Rats are nocturnal and avoid contact with people and light. A rat out in the open during the day is almost always being pushed out of the nest by high competition — meaning the colony is already large enough that there is not enough food or space for the whole population overnight.

A single daytime sighting is not a minor problem that can be monitored. It indicates an established infestation that needs professional treatment promptly.

What To Do If You've Spotted the Signs

Do not wait. A single breeding pair of rats can produce a colony of 50 or more within three months. The longer an infestation goes untreated, the more contamination, structural damage and cost is involved.

Do not rely on supermarket bait stations. D-I-Y rodenticide blocks placed without a survey rarely work for three reasons: rats are increasingly resistant to first-generation anticoagulants; bait placed without identifying entry points does not stop new rats coming in; and loose bait placed around the property is a secondary poisoning risk to pets and wildlife.

What a professional treatment involves:

1. A survey to identify entry points, active runs and the scale of the infestation
2. Tamper-resistant bait station placement on active runs
3. A follow-up visit 7 to 14 days later to check uptake and replenish if needed
4. Recommendations on proofing entry points to prevent reinfestation

Most residential rat treatments in Carlisle require two visits and cost between £95 and £180 depending on property size and infestation level. Use the price calculator on the homepage for a guide price before you call.

Frequently Asked Questions