I'll agree with Mike and Eric on this. Would relate a story that I just dealt with too of similar nature.
One cabin we just worked on was slated for a fall exclusion after the maternity colony is fully ready.
There are maids for these folks and they clean up without generally making mention I'm finding of
any guano or whatever, in and out get the job done sort of deal and I won't begrudge them for that.
The property management company calls me saying they've been trying to catch a rat for the last few
weeks and can't seem to, would I give them advice next time in the area. I get there and look and
it is bat guano and as Mike stated it is falling from the 1 by 4 trim board that spans between the tongue
and groove peaked ceiling. You could see guano along the edge where it was spaced and sure enough
it was falling on the couch and carpet. Problem solved by sealing this board and the client getting proper
exclusion next month.
While I'm there literally working on this little seal up, I get a call from the same town and the homeowner
relates that his property management company said they saw some guano on the carpet, a few droppings
nothing crazy.
So they explain to the out of state owner, they've got a guy who handles bat issues. This guy is sent and
when the owner and his wife arrive in town the first night they meet the guy finishing up. He tells them
hes dealt with hundreds of bats jobs and everything is all set. He explains that he noticed the trim board
had some guano coming down, so he removed the entire length of it and when he did guano and bats fell into
the living area (very very very nice home, that though used seasonally, is immaculate and new). He removed
those bats and apparently cleaned up the visible guano and then he shot foam into this space.
Next he went outside and found all the places he could that he felt bats were coming in through and sealed them
again with foam.
That night the owners were awakened by more than 10 bats within their home flying loose. The next night 4,
the night after that 5 and so on till a local friend whose son hired us last year gives her the phone number.
So we go over and within a few minutes in the home I can hear bats within the wall upstairs, I go outside on the
roof and can hear bats within the exterior wall voids. After explaining to him about the maternity season and
about proper bat exclusion he is more than willing to have me step in and correct this if possible.
I spend about 20 minutes cutting two or three cans worth of great stuff out of the hole, another couple of hours
searching around the rest of the multi peaked roof and in the end leaving them to it for now telling them to call
me if they have another bat inside the home in the following days.
The next night they watch more than 200 bats fly out of the hole I cut and haven't had a bat inside the home since
as they are now free to leave.
I realize this post is lengthy but I wanted to point out, many people seem to be doing exterior exclusion when they
can't see what is inside during the maternity season. Knowing every part of the country is different and pups are
born at different times to different species, depending on where you are, I'd just add this to the mix.
Be sure you know whether or not they have non volant (non flying) pups. If you can't tell I've not had a customer yet
refuse to wait it out, if the inside of their home was sealed and access was limited.
That wasn't directed at you nighthunter, just a general statement.
I would throw one more thing your way though just in case you haven't checked. In the last few weeks many of my
inspections clearly showed warped screens on windows on the second or third story and people having the windows
open. With urine on the windows and night roosting in close proximity, this is absolutely how many of my clients
ended up with interior bats.
As Mike said, guano is so light its ridiculous, so it could very well be blowing out a very small hole or crevice that a bat
can't get through, but the bats may be on top of. I feel bats teach me something new about a structure every single time
I take a new job. I try to repay them by teaching the homeowner or property manager the best I can about good exclusion
and the timing of said exclusion.
Good luck with it, would like to know your update when you figure out what is going on. I find bat work very enjoyable
but extremely tedious and time consuming due to the nature of the cracks and crevices you have to find and seal.
Justin