Me and Kim started our guano clean outs this week. And to put it mildly, we are up to our ears in bat doo-doo!

do you compost it? isn't that what they grow commercial mushrooms in?

Same thing here Mike.... I always schedule all the bat guano clean-outs for winter (Nov/Dec/Jan). The attics are cool (safer working environment) and it spreads out the work load, allowing many more exclusions to be performed during the fairly short window in late summer and fall.

I have been doing some large churches with some serious accumulations. One of them had about 2000 bats, and I would guess that bats have been using the site for 50 years or more. About 20 inches of guano in a 5-foot wide strip below the ridge, along with 2 to 6 inches almost everywhere throughout the attic.

As far as disposal.... no composting, and no "selling" done on my part. Too many safety issues (read: liability) to take a chance. I did a lot of research and contacted organic garden supply houses, but it was too risky due to the possiblity of a "consumer" Histoplasmosis occurence. Regardless of what company packages and sells it, if someone gets sick it will come back to you and your company (as the product supplier). Release forms or other papers stating you are not responsible for any health issues are not worth the paper they are written on.

It does drive me crazy to "waste" the guano..... I see it listed on many websites for about $10 a pound. I threw away 5600 pounds from a single courthouse attic a few years ago..... but I would rather throw $56,000 into the dumpster than risk my business, home and all belongings. I even tried arranging for a garden product supplier to have a truck on-site to load with guano during the clean-out, but even if they use their own truck and haul it away, the liability STILL comes back on me, even if I gave away the guano for free.

Burrrrrrr........

After playing in sprinkles all day the last thing i want to do is bag it up and sell it.