American Cockroach

What it looks like

• Largest common roach — 1.5 to 2 inches long
• Reddish-brown with a yellowish figure-8 or 'mask' marking on the pronotum
• Long wings — adults can glide for short distances
• Often called 'palmetto bug' or 'water bug'

Where you'll find it

• Basements, crawl spaces, and floor drains
• Sewer lines, sump pits, and steam tunnels
• Restaurant and grocery loading docks
• Boiler rooms and warm utility areas

Behavior & biology

American cockroaches prefer warm, moist, dark spaces. They breed in sewers and storm drains and enter buildings through floor drains, sump pits, and around plumbing penetrations. They rarely establish a true breeding population inside a home — most indoor sightings are wandering individuals from a sewer or drain harborage. Adults live 1–2 years and a single female can produce 800+ offspring.

Iowa activity calendar

Signs of an infestation

• Large reddish-brown cockroaches in basements, especially near floor drains
• Cylindrical dark droppings (larger than German cockroach pellets)
• Egg cases (oothecae) glued near sewer line entries
• Musty smell in heavy infestations

Health & property risk

Carries pathogens picked up in sewers — Salmonella, Shigella, E. coli, and others. Allergen contributor. Disturbing in restaurants and food businesses for obvious reasons.

How we treat it

1. 1

   Drain + sewer treatment

   We treat floor drains and sewer line access points with insect growth regulator and residual insecticide — this is where the breeding actually happens.

2. 2

   Exterior perimeter + harborage

   Treatment of foundation gaps, utility penetrations, and basement window wells.

3. 3

   Bait stations in basement

   Long-lasting gel and granular baits placed in basements, mechanical rooms, and crawl spaces.

4. 4

   Seal entry points

   We point out the cracks, drains, and utility lines that need sealing or screening.

Why DIY usually fails

Pouring bleach down floor drains does nothing for the cockroach population in the sewer line. Drain-line treatment with a proper IGR and residual is the only thing that breaks the cycle.

FAQ