Not sure I’d say there’s “no noticeable difference” with 1/4" hardware cloth on all vents, especially if you’re in a spot with a lot of pollen or dust. I’ve seen attic fans slow down after just a year because the mesh got caked up, even though it started clean. Maybe it’s less of an issue if you’re checking every season, but most folks forget until there’s a problem. Also, I’ve run into a couple jobs where the oversized mesh didn’t sit flush and left tiny gaps—mice still found their way in. Ever tried using pre-formed vent screens instead? They can be a pain to fit on odd shapes, but they seem to seal better and don’t get as wavy over time. Just something I’ve noticed after crawling through more attics than I care to admit...
I’ve seen attic fans slow down after just a year because the mesh got caked up, even though it started clean.
Funny thing, I’ve actually had the opposite problem—hardware cloth stayed pretty clear for me, but those pre-formed screens clogged up with spider webs and pine needles like nobody’s business. Maybe it’s just my luck (or my neighbor’s trees). I do get what you mean about the gaps though...mice are basically tiny ninjas.
I do get what you mean about the gaps though...mice are basically tiny ninjas.
That’s the truth—had one squeeze through a gap I could barely fit a pencil into. On the mesh vs. screen debate, I’ve found it really depends on your local “debris profile.” In one property with big oaks, the fine screens were hopeless after fall, but hardware cloth worked better. Still, you trade off airflow for pest control and vice versa. Maintenance is key either way, but I wish there was a truly set-and-forget option out there.
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“you trade off airflow for pest control and vice versa”
- That’s my issue too. Fine mesh blocks bugs but clogs up quick, especially after a windy fall.
- Hardware cloth lets more air in, but I’ve seen squirrels chew through it if they’re determined.
- Ever tried those combo vent covers with angled louvers? Not sure if they’re any less hassle, but curious if anyone’s had luck with them.
- I keep thinking there’s gotta be a middle ground that doesn’t turn into a cleaning project every season...
Those angled louver covers are interesting, but I’ve seen mixed results. They do help keep out bigger critters and some rain splash, but if you’re in a spot with a lot of fine debris (like pine needles or cottonwood fluff), they can still clog up over time. Plus, if the louvers are too tight, you’re back to restricting airflow again.
I’ve run into folks who try layering—hardware cloth on the outside for strength, then a finer mesh inside for bugs. It’s more work up front and doesn’t totally solve the cleaning issue, but it does slow down the squirrels. Not sure it’s worth the hassle unless you’ve got a real rodent problem.
Ever notice how some older homes just have big open vents and somehow don’t get overrun? Makes me wonder if we’re overengineering things sometimes... but then again, I’ve seen what happens when raccoons move in. Never fun.
Curious if anyone’s tried those plastic vent baffles with built-in screens? I haven’t seen them hold up long-term, but maybe I’m missing something.