Raccoon Prevention Tips That Actually Work

Most raccoon prevention tips are a list of things that are easy to do rather than things that work. Motion lights near the top, sealing the roofline somewhere near the bottom. That ordering is backwards, and it is why people do six of them and still end up with a raccoon in the attic.

This list runs the other way round. The first four are the ones that genuinely keep a raccoon out of the building. The rest help, and the last two are worth knowing about mostly so you do not waste money on them.

1. Cap the Chimney and Cover the Vents

An open chimney is a hollow tree as far as a raccoon is concerned, and a female looking for a den site will take one every time. A proper stainless steel chimney cap fitted to the flue solves it permanently. The same applies to roof vents, gable vents and the dryer vent, all of which need covers that are screwed down rather than clipped.

This is first on the list because it addresses the most common way a raccoon gets into a house, and because once it is done it stays done.

2. Close the Roofline

Walk the perimeter of the house and look up at the junction between the roof and the walls. Loose or lifted soffit panels, a gap where the fascia meets the roof edge, a corner where two roof planes meet. Those are the openings raccoons widen.

Repair them in materials that cannot be pulled apart. Mesh and sheet metal rather than expanding foam, which a raccoon will go through in a night. If you do one thing on this list after the chimney, do this.

3. Cut Branches Back From the Roof

Raccoons climb well but they prefer not to. A branch that reaches within a few feet of the roof is a bridge, and removing it makes the roof a much harder target. Six to eight feet of clearance is a reasonable aim. Climbing plants against a wall do the same job for them, so those are worth looking at too.

4. Lock the Bins Down Properly

Not just lids on. Raccoons open ordinary lids easily, and they are strong enough to tip a bin over. Latched lids, or a bar across, or bins inside a closed store. Whatever you do has to survive a determined animal with hands rather than just a bit of wind.

A bin that gets raided every night is what turns a passing raccoon into a resident one. Fixing it will not evict an animal that has already denned, which is why it is fourth rather than first, but leaving it undone undermines everything above.

5. Take Away the Other Food

• Pet food indoors overnight, including bowls on a porch.
• Fallen fruit cleared rather than left to sit.
• Bird feeders taken in at night, or on a pole with a baffle. A feeder is a nightly meal delivered to the garden.
• Compost in a closed bin rather than an open heap.

6. Clean the Grill and the Outdoor Dining Area

Grease in a grill tray carries a long way on a warm night and it does not need to be much. Empty the tray and wipe down after use rather than before the next one. The same goes for an outdoor kitchen, an ice chest left out, and the area under a table where children have eaten.

7. Keep Cats and Small Dogs In After Dark

Less about the raccoon attacking a pet, which is uncommon, and more about two things. A pet flap is an entry point, and a raccoon will use one. And a cornered raccoon defending itself or a litter will do real damage to an animal that goes near it. Shutting the flap overnight handles both.

8. Lighting, and What It Actually Does

Motion activated lighting is on most of these lists and it does have an effect, but a modest one and a temporary one. A raccoon that finds nothing to eat under a light stops coming. A raccoon that finds a raided bin under a light gets used to the light within about a week.

Worth having for other reasons. Not worth relying on, and not a substitute for anything in the first four.

9. Repellents, Honestly

Ammonia rags, predator urine, ultrasonic devices, pepper sprays. None of it holds. Scent based deterrents wash off and fade, and raccoons habituate quickly to anything that turns out to be harmless. Ultrasonic devices in particular have no good evidence behind them.

We would rather say that plainly than sell you a bottle of something. If a repellent appears to be working, it is usually because something else changed at the same time.

10. Fencing, and What It Would Actually Take

Most lists say install raccoon proof fencing as though it were an afternoon job. It is not, and an ordinary fence will not slow a raccoon down at all. They climb well and they are good with their hands.

Fencing that genuinely excludes a raccoon needs either an electrified strand near the top or a roller bar or floppy top that will not take their weight. That is a serious installation and it is normally only worth it around something specific, a chicken run or a pond, rather than around a garden.

If somebody has recommended fencing as a general solution, ask them which of those two they mean.

When Prevention Is Already Too Late

All of the above keeps a raccoon from choosing your house. None of it removes one that already has, and sealing an opening with an animal inside makes things considerably worse rather than better.

If you are hearing movement overhead, or finding droppings, the order changes completely. Get the animal out first, then close the opening, then do the list above so it does not happen again.

Conquest Pest Services handles professional wildlife removal across Fort Bend County and the surrounding area, including the exclusion work that stops it recurring. Tell us what you have noticed and request a free estimate.

Raccoon Prevention FAQs

Do ultrasonic raccoon repellents work?

There is no good evidence that they do. The marketing is confident and the research is not. Raccoons habituate quickly to a sound that never turns out to mean anything, and in a garden with food available the sound loses every time. The money is better spent on a chimney cap.

What time of year should I do this?

Late summer and early autumn is the best window. Den sites are chosen before winter, and by late winter a female may already be using one, at which point sealing anything becomes a problem rather than a solution. If you only get to it once a year, do it before the cold.

Will removing food sources make a raccoon that is already in the attic leave?

Not reliably, and not quickly. A raccoon that has denied in a roof space will simply forage further afield and keep the den. Food control stops new animals being drawn in and it stops a passing visitor becoming a resident, but it is a prevention measure rather than a removal method.