Gable vent and bats

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Old 09-20-20, 10:41 PM
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Gable vent and bats

Hello, I have a gable vent similar to this. There is mesh on the inside to prevent critters from entering the attic. However, this hasnít stopped bats from living in the gable vent. How would I attach some mesh on the exterior side and what size mesh should I use?



 
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Old 09-21-20, 04:51 AM
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You can use aluminum screen or hardware cloth. Something with an opening size 1/4" or smaller should work. You can attach it with adhesive caulking or screws. But since it's going on the outside it will be visible. I would cut hardware cloth to size then paint it to match the vent with oil based paint. After the paint dries then mount it to your vent.
 
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Old 09-21-20, 04:58 AM
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I think that 1/4" hardware mesh would be a small enough opening to exclude bats/rodents. Now what I don't know is if the mesh would impede air flow to a significant extent. I'm sure others here have knowledge as to that aspect.

Is your gable painted wood, vinyl, aluminum, etc? That will help in determining fasteners, though I've not done much exclusion work myself. I let that to others more talented than me. Possibly the mesh could be spray painted to match as well.
 
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Old 09-21-20, 05:26 AM
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Hardware cloth shouldn't impeded air flow.

The hardest part will be installing it in a manner where it isn't unsightly.
 
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Old 09-21-20, 05:38 AM
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You could even get a decorative/expanded sheet metal which would be easier to install but more visible.

Also, bats are being stressed and a great asset to your property, they eat so many annoying bugs.

Do what you can to remedy the situation but do it without harm!
 
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Old 09-21-20, 07:31 AM
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If you are in a area that gets cool in winter that bats likely do not live year round in your vent. Depending on your location the bats will migrate away for winter if they haven't left already. When they are gone for winter is a perfect time to cover the vent. You can prevent them from roosting there next year without doing them any harm.
 
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Old 09-21-20, 02:24 PM
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We have vinyl siding so I assume the vent is vinyl too.

recommended fasteners?
 
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Old 09-21-20, 02:27 PM
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Iím in Canada, so yes, it gets ďcoolĒ. Lol.

i saw the bat last week but we installed a plastic exit trap and it appears to be gone and not returned.
 
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Old 09-28-20, 09:29 AM
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How should I install the hardware cloth to the vinyl gable vent? Iíve already painted the cloth to match.
 
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Old 09-28-20, 10:59 AM
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You can use caulk to glue the cloth in place or use screws.
 
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Old 09-28-20, 01:50 PM
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Not sure I'd trust glue but screws with washers should work well.
 
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Old 09-30-20, 07:34 AM
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Any type of screw, size, length youíd recommend for a vinyl dormer vent?
 
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Old 09-30-20, 09:33 AM
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You don't need much to hold the screen in place. I would use #6 or #8 stainless steel sheet metal screws 1/2 - 3/4" long. Depending on the hardware cloth you've got you may need a washer under the head.

 
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