How do I clean Bat Feces out of my Attic?
In cleaning up bat feces, or guano, your first concern should be
your personal safety and that has mainly to do with protecting
yourself from the Histoplasma capsulatum fungus spores that exist in
the droppings. When inhaled, the spores cause a disease called
histoplasmosis, which manifests with flu-like symptoms – fever,
chest pain, dry cough, and head, joint and muscle ache, among
others. While the symptoms often are barely discernible, fatalities
resulting from the disease have been known.
Bat feces consist of tiny pellets that are virtually dry when fresh
and over time, they become more so, essentially turning into dust
that over time can accumulate to considerable piles under the roost.
Any disturbance of the pile is sure to raise a cloud of dust, so the
first consideration in the clean-up campaign should be your gear:
most important, a full face mask with a HEPA vacuum cleaner-level
filter and a set of coveralls. Disposable ones are a good idea. So
protected, you’re ready to go to work.
Start by wetting down the material you intend to remove with a light
spray of water containing 10 percent bleach to keep the dust from
becoming an aerosol. While professionals normally perform the job
using industrial vacuums with high efficiency filters, your approach
most likely will involve scooping up the material, placing it in
plastic bags and tying the bags shut securely so that no dust
If necessary, continue to wet down the area during the removal
process to minimize the possibility of the dust escaping to other
areas of the house. Once you’ve cleaned the attic, take the bags of
guano to a landfill, making sure that it’s permissible to leave them
there. Sometimes, it is considered hazardous waste and if so,
landfill personnel or local health officials can steer you to an
appropriate disposal site.
Finally, be sure to clean the equipment you’ve used thoroughly in
order to assure that you don’t store some of the contaminants along
with the gear.
If you haven’t already done so, take a survey of the building to
locate any openings where the bats might try to reenter. If you find
any, close off the small ones with silicone, and address the larger
ones with wire mesh, if you want air flow; or cover them completely
with sheet metal, plastic or wood.
Then, assuming the bats are still around, buy or build them a house
and place it on a pole in the yard.
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more information about How do I clean Bat Feces out of my Attic?.
Read more about bat control in my educational articles. Find out if a bat house
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will help with a bat issue. Learn if a bright light or high pitch sound deterrent machine
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. Find out if a pest control company
will remove a bat, and whether it is Legal
to trap bats.
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really help repel bats and even if bats make Good Pets
. Read my thoughts on if you should ever Poison a Bat
, and my best advice on how to clean Bat Feces out of your Attic