Plumbing vents - mesh screen

Smell inside or out?

If inside ya prolly gotta clogged vent pipe
All smell should go up thru the gent pipe to outside air

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Roaches second as we have had quite a few falling from the bathroom vent … not fun to have a roach fall in my lap while im browsing TD and dropping a deuce

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If there's a Mrs. involved, the decibel level could be deafening. I know it would if that happened at my house.

Oh, and the potential clean-up would be something for a HazMat crew.

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Is a single layer of this too restrictive a pest barrier? Zip-tied over an open plumbing vent last week and have since noticed a musty smell coming from the bathroom ceiling vent I believe it ties into. Wondering if I should swap it with some chicken wire

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A plumbing vent is a piece of pipe usually 2-3” in diameter that protrudes through the roof about a foot. It vents the plumbing. If it’s over a bathroom it’s normally 3”.

Putting a screen over a plumbing vent like that to keep out rats shouldn’t bring odors inside.

Now there are exhaust vents that exhaust air from bathrooms to remove odors. There is normally some kind of low silhouette sheet metal cap on the roof. In thd exhaust fan connected by duct to the cap there is usually a backdraft damper. It keeps air or animals ftom coming in to your house. I don’t understand how putting screen on this type vent would induce odors into your bathroom unless it is now plugged up and air can’t exhaust through it.

If you have rats and bugs coming into your house from your plumbing vents, you have bigger problems.