Pest Birds and Commercial Properties: More Than a Nuisance

Birds are an important part of our ecosystem, but when they invade commercial properties, they can quickly become destructive pests. From roof damage to health hazards, pest birds and their droppings cost U.S. businesses tens of millions of dollars every year.

The Hidden Costs of Pest Birds

• Slips and falls – Bird droppings are slippery when fresh. One case resulted in a $2.7 million settlement after a worker slipped on droppings near an elevator shaft.

• Property damage – Bird droppings contain uric acid (pH 3–4.5), which can eat through roofing materials, steel, paint, and even concrete. A light but steady layer of droppings can cut a roof’s life expectancy in half.

• Blocked systems – Nests in gutters, drains, chimneys, and ventilation systems can lead to water damage, blocked airflow, or even carbon monoxide buildup inside buildings.

• Fire hazards – Nests made of straw and dried droppings are highly flammable, especially when built inside electrical signs or near machinery.

• Health concerns – Researchers have identified more than 60 diseases and parasites carried by birds, including histoplasmosis (from inhaling disturbed droppings) and toxoplasmosis (linked to contaminated surfaces).

• Reputation risk – Droppings around entrances, sidewalks, and awnings project poor maintenance and can drive away tenants or customers.

  
  

Where Problems Show Up

• Roofs & Gutters – Standing water and leaks when drains are blocked.

• Ventilation Systems – Airflow restrictions and contaminated indoor air.

• Machinery & Vehicles – Droppings corrode surfaces and finishes.

• Interiors – Birds inside warehouses, hangars, or malls can spoil products, contaminate food, and even drop waste on customers or employees.

  
  

Deterrence Strategies

Property owners have several tools available to discourage pest birds:

• Bird spikes and porcupine wire – Simple, effective deterrents for ledges and signs.

• Pin-and-wire systems – Prevent birds from landing on railings or edges.

• Bird netting – Best for large spaces like warehouses or under roof overhangs.

• Repellents – Sticky pastes, liquids, or safe EPA-regulated chemicals that encourage birds to relocate.

• Scare-away devices – Moving balloons or reflective devices that disrupt flocking behavior.

The right solution depends on the property type, species of bird, and areas of activity.

The Guardian Advantage

While bird control itself is outside the scope of a standard inspection, Guardian Commercial Inspections helps property owners spot the early warning signs of bird damage and infestation during routine evaluations. By documenting droppings, nests, or corrosion, we help owners:

• Understand potential risks to safety, health, and property value

• Plan for cleaning, repairs, or specialized bird-proofing

• Reduce liability exposure and improve property image

Birds may be graceful, but in the wrong place they are far more than a nuisance. With Guardian’s inspections, you gain the knowledge needed to protect your property, your occupants, and your bottom line.