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Question DetailsAsked on 8/20/2017

How to Discourage bats from roosting over the front door

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Here are links to a few previous questions with answers about bat issues - several deal with bat issues and removal/prevention in general, a couple specifically with bats under porch roofs or overhangs -


http://answers.angieslist.com/How-I-b...


http://answers.angieslist.com/BATS-ri...


http://answers.angieslist.com/Bat-rem...


http://answers.angieslist.com/How-I-r...


http://answers.angieslist.com/where-I...


One thing that seems to work well though unsightly, from blogs and professional measures, is a nylon/rayon bat/bird netting which is stapled up to cover the roosting area - though I have also heard of the bats just clinging to the netting to roost, so that is not a guaranteed solution. has to be a small enough mesh tht they cannot squirm through it, so pretty small mesh - about 1/4" or smaller. If in an area with swallows, should be a loose, not tightly stretch mesh, otherwise they may starting building their nests on it.


There is a chemical treatment - chloropacinone, which professional pest control people can use for this - works like rat poison, as an anticoagulant which is applied as a dust and the bats ingest it when they groom after coming into contact with nesting surfaces coated with it. However, using that over your front door? I would not - is just as deadly to people as to bats, and I would not want that powder sifting down onto me when the door is slammed or spread around when the bats knock it off the wall.


Some people swear by ultrasonic bat repellers - I know in a house I lived in a few score of years ago (and presumably they have been improved since then) one unit kept bats out of a barn with, as far as we saw, 100% effectiveness. Other people say that is useless - probably depends on brand. These units can also be extremely irritating to dogs, so that might be a consideration.


Since roosting places are partly chosen because they are darkish in the day, some people have had luck putting in a floodlight aimed up (not close enough to catch fire) into the roosting area - but to be bright enough to be effective, even if LED bulb, likely to cost something like $10+ per month to run - more like $20-40/month if halogen or sodium or similar high-intensity bulb.

Answered 1 year ago by LCD




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