5 Signs Of A Roach Infestation (And How To Prevent Them)

1. You're Seeing Live Roaches During the Day

Cockroaches are nocturnal by nature. If you're spotting them in broad daylight, that's a major red flag.

It means the population behind your walls has gotten so crowded that roaches are being pushed out of their nests during hours they'd normally stay hidden. A single daytime sighting is a sure sign of an established roach infestation.

The question we hear all the time:

"Do I have an infestation or just one roach?"

Here's the honest answer: if you saw it during the day, you don't have just one roach. If you saw it at night, you might, but we'd still want to inspect. Roaches don't live alone.

Spotted a roach? Don't wait. Call Keystone Pest Pros for an inspection. Our exterminators offer roach control services for German, American, Oriental, & Brown Banded cockroaches.

2. Roach Feces in Your Kitchen or Bathroom

Roach droppings are one of the most reliable early indicators of pest activity.

Here's how to tell what you're looking at:

German cockroach droppings look like small dark specks or grains of black pepper. You'll often find them along baseboards, inside cabinet hinges, behind the refrigerator, and in the corners of drawers.

American cockroach droppings are slightly larger: Cylindrical, dark brown, with ridged edges. These tend to show up in basements, utility rooms, and near floor drains.

If you see debris that looks like crushed black pepper, especially in your kitchen, it might be a confirmed sign of a roach infestation.

3. You Notice a Musty, Oily Odor in your Kitchen

Cockroaches produce pheromones and cuticular hydrocarbons that creates a unpleasant smell akin to wet cardboard.

When a population grows large enough, that smell becomes noticeable near:

- Refrigerators & Dishwashers
- Under the sink
- Basement utility spaces
- Floor drains

If you've been noticing a smell in your kitchen that no amount of cleaning seems to fix, pest activity may be the source

Is the smell dangerous? The odor itself isn't toxic, but roaches spread diseases like salmonella & E. coli to humans and pets.

4. You find Egg Casings in Hidden Spots

Roach egg casings (oothecae) are one of the most overlooked signs of an active infestation. They look like small, dark brown capsules, roughly the size of a tic-tac to a small bean depending on the species.

German cockroach oothecae hold up to 50 eggs each. They're small, light brown, and often found still attached to surfaces in warm, humid areas. American cockroach oothecae are darker, about 8mm long, and are usually found in basements, behind water heaters, and inside water drains.

Where to check:

Under appliances, inside cabinet hinges, along the backs of drawers, behind the toilet, and inside electrical outlet boxes near the kitchen. A single German roach female produces up to 8 oothecae in her lifetime: each one containing up to 50 eggs. That's 400 offspring per female!

5. Rusting & Clicking Noises at Night

This one surprises people, but a large roach population in a wall void is audible. The rustling of their movement, especially in the quiet of the night, can be heard near appliances, in kitchen walls, and around pipe chases. Some people describe it as faint crackling or movement sounds. Be aware that this sign alone does not indicate you have a roach infestation, as termites and rodents also produce noises at nighttime.

Keep your Home Roach Free...

Keystone Pest Pros serve Philadelphia and surrounding neighborhoods. Call us today to schedule your inspection.