How to Stop Rats Coming Into Your House

The surest way to stop rats coming into your house is to block the routes they use and take away the reasons they visit. In Cape Town that usually means meshing gutters and downpipes, fitting metal kick plates to wooden doors, cutting back trees and creepers, sealing old pipes and drains, and keeping food and rubble under control.

Key takeaways

• Both the brown (Norway) rat and the black (roof) rat are common in Cape Town, and they get in differently.
• Roof rats climb into warm ceilings, especially in winter, using gutters, downpipes, trees and creepers.
• Brown rats come up from drains and sewers and gnaw in at ground level.
• Poor storage, careless waste disposal and badly managed municipal facilities nearby all feed rat populations.
• Proofing and regular maintenance keep rats out far better than poison.

Know your two intruders

The brown rat, also called the Norway rat, is a heavy, ground-dwelling burrower. It lives in sewers and stormwater systems, digs under paving and sheds, and moves into homes at floor level through drains, gaps under doors and holes around pipes.

The black rat, or roof rat, is lighter and a superb climber. It runs along walls, fences, power lines and branches and lives in roof spaces and trees. When the cold, wet Cape winter sets in, a warm, dry ceiling with insulation to nest in is very attractive.

Knowing which one you have tells you where to focus. Droppings and noise in the ceiling point to roof rats. Burrows in the garden and activity around drains and the kitchen floor point to brown rats.

What rats cost you

Rats scavenge from bins and spread rubbish around. Brown rats burrow into and damage sewer lines and drains. In shops, warehouses and pantries they spoil far more stock than they eat by gnawing packaging and leaving urine and droppings. Most seriously, they chew electrical cables, and damaged wiring in a ceiling can start a fire.

Why rats end up at your house

Rats follow food and shelter. Common causes we see across Cape Town include:

• Poor storage. Bags of dog food, bird seed or chicken feed left open in the garage or outbuilding.
• Lax waste disposal. Overflowing bins, bags left outside on the wrong day and compost heaps with cooked food.
• Nearby facilities. Poorly managed municipal dumps, drains and open spaces can support large rat numbers that spill into surrounding streets.

You cannot control the municipal side, but you can make sure your property is the hardest one on the street to get into.

Practical tips to keep rats out

Gutters and downpipes

Roof rats climb inside downpipes and along gutters to reach the roof. Fit chicken wire or a fine metal mesh over the top of downpipes and at gutter outlets, and check that it is secure after storms. This single job stops a lot of winter ceiling problems.

Doors

Rats gnaw at the bottom corners of wooden doors to widen a gap. A metal kick plate fitted to the lower part of external wooden doors, along with a tight door sweep or brush strip, removes that option. Garage doors with a gap underneath need a proper rubber seal.

Trees, creepers and fences

Roof rats use branches, ivy, bougainvillea and other creepers as ladders. Cut trees back so branches do not touch or overhang the roof, and keep creepers trimmed well below the gutter line. Check where walls, fences and electrical lines meet the house too.

Pet food and feeding times

Feed pets at set times and pick up the bowl once they have eaten. Do not leave food out overnight. If you feed birds, use a feeder with a catch tray and do not scatter seed on the ground.

Building and garden rubble

Piles of old bricks, timber, roof sheeting and garden cuttings make ideal nesting spots. Clear them away, or at least stack materials off the ground and away from walls so there is no protected space underneath.

Drains, pipes and sewer hatches

Brown rats come up through the drainage system. Seal unused drainage pipes, cap old plumbing holes left behind after renovations and make sure sewer inspection hatches are closed and intact. Gaps around pipes where they enter walls should be filled with a rodent-resistant material, not just foam.

Regular maintenance

Proofing is not a one-off job. Mesh rusts, door seals wear, branches grow back and builders leave holes. Walk around the house every few months, especially before winter, and fix anything that has opened up.

Signs rats have already got in

1. Scratching or scurrying in the ceiling at night.
2. Dark droppings along walls, in cupboards or in the roof space.
3. Gnawed packaging, cables or wood.
4. Greasy smear marks along walls and beams where they run.
5. Pets staring at walls or ceilings, or a strong musty smell.

When to call in professional rodent control

If rats are already living in the roof or under the house, proofing alone can trap them inside, so the order of work matters. Our 6-step rodent regime covers harbourage, food and water, ingress proofing, a bait risk assessment, a tailored plan and a written report. Where bait is needed, we use tamper-resistant stations placed with children, pets and wildlife in mind.

You can WhatsApp us photos of droppings or damage for identification, and quotes are free. Find out more about our rodent control in Cape Town, or go straight to rat control if you know it is rats. Treatments carry a minimum 3-month guarantee.

Frequently asked questions