A person wearing white protective clothing kneeling in an attic, using a vacuum to remove bat guano and debris from the insulation floor.

Guano Cleanup and Attic Decontamination

Bat guano cleanup is a critical step after bats have been fully excluded from the home. Removing bat poop, urine, and contaminated materials helps restore indoor air quality, reduce health risks, and eliminate lingering odors in attics and wall cavities.

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Guano, or bat poop, on a concrete surface near a wooden and metal structure

What Is Bat Guano?

Bat guano is bat droppings that accumulate in attics, wall voids, insulation, and along structural surfaces where bats roost. Over time, guano often mixes with bat urine, compresses into insulation, and produces strong odors that can spread throughout the home.

Even small colonies can create significant buildup over a single season.


Why Guano Cleanup Is Important

Guano cleanup is not cosmetic. It directly affects health, air quality, and the long term condition of your home.

View of a guano clean up in an attic with a vacuum working to suck out the contaminates.

Health and Safety Concerns

  • Bat guano can harbor fungal spores associated with respiratory illness such as histoplasmosis

  • Disturbing dried guano without protection can release particles into the air

  • Bat urine and droppings may attract insects and secondary pests

Odor and Air Quality

  • Guano and urine create strong ammonia like odors

  • Smells can travel through HVAC systems and ceiling cavities

  • Odors often remain even after bats are removed unless cleanup is performed

Structural and Insulation Damage

  • Guano compresses and ruins attic insulation

  • Moisture from urine can damage wood and drywall

  • Long term buildup can contribute to staining and material degradation


Two men in protective gear, including white coveralls, gloves, respirators, and helmets, stand inside a garage, talking and smiling at each other getting ready to go do bat guano remediation and decontamination.

Our Guano Cleanup Process

Guano cleanup is performed only after successful bat exclusion has been completed.

Our process typically includes:

  • Removal of bat guano and soiled insulation when necessary

  • HEPA filtered vacuuming of affected attic or wall cavity areas

  • Cleaning and treatment of contaminated surfaces

  • Application of professional deodorizers and neutralizing agents

  • Odor control treatments to reduce lingering smells

Every cleanup is tailored to the level and location of contamination. In some cases, guano or urine may be present in concealed or hard to access areas such as wall or ceiling cavities. When this occurs, we review access options with the homeowner before proceeding. Any necessary opening or reconstruction of finished surfaces can be coordinated with, or completed by, other qualified contractors.


Is Guano Cleanup Always Required?

Not every bat issue requires full guano remediation.

Cleanup may be recommended if:

  • Guano buildup is visible in the attic or other parts of the structure.

  • Strong odors are present inside the home

  • Insulation has been clearly contaminated

  • Bats have occupied the structure for multiple seasons

We will explain whether cleanup is necessary based on inspection findings.

A person in protective gear, including a helmet, gloves, and face mask, is working inside a wooden attic space, using a spray bottle to deodorize the smell left by bats. The unfinished wooden framing and insulation are visible.

Frequently Asked Questions

Can I clean up bat guano by myself?

Bat guano cleanup is not recommended as a DIY project. Improper handling can release airborne particles and expose homeowners to health risks. It is always best to treat guano as if it were a hazardous material.

Does guano cleanup remove smells?

In most cases, yes. Professional removal combined with deodorizers and neutralizing treatments significantly reduces or eliminates odor. In cases of prolonged guano & urine buildup, several treatments may be needed.

Will new insulation be needed?

That depends on the level of contamination. We will review options with you if insulation removal is necessary.

The floor of a patio covered in Bat Guano from a bat colony.