Buildings where bats have resided for years can suffer incredible damage from the guano and urine left behind.
Readers are cautioned that bat cleanup requires special equipment as it can pose incredible safety hazards.
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Scientific Name: Order of Chioptera
Identifying Bat Droppings
If you find piles of mouse like fecal material in your attic or on the ground outside your house, then you probably have bats. (Bats defecate before they enter your home and below where they roost for the day see photo)Make sure that the fecal material is not old by laying down a piece of newspaper and see if any more droppings fall on the paper. If there is, you have bats. (Just a word of caution about droppings. They can carry a fungus known to cause Histoplasmosis. Don't breathe the feces and avoid contact with them. Ideally, you should wear a HEPA filter mask and spray the fecal material down with 10% bleach solution). You can distinguish between bat droppings and mouse droppings in two ways. First, bat droppings tend to be clustered as they will pile up below where the bat is roosting. Second, bat droppings will have a shiny speckled appearance (from all the insect wings) and will crumble like dust when touched. Mouse droppings on the other hand, tend to be scattered about and become hard when dry.
STEP 1. Get Informed!
STEP 2. Consider the following:
Step 3. Consult at least 2 qualified professionals.
Cleaning up Bat Guano & Bat Urine Stains
Here are a few suggestions. We would love feedback on whether people found these techniques effective or not.
Suggestion #1. Remove the affected portion and repatch.
Suggestion #2. Muratic acid. Be careful though as this is potent material.
Suggestion #3. If I was going to try it I would scrub lightly with bleach solution, let it dry, cover with strain primer like Kilzit and than paint.
Information courtesy of Thomas J Reilly
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