Getting attic airflow right: my step-by-step for better roof health

That’s interesting about the hardware cloth - it sounds sturdier than what I’ve got up now. I’m curious, did you have to custom cut it for each vent, or is there a standard size? I’ve only poked around up there once since moving in, and I noticed a bit of daylight near the eaves. Not sure if that’s normal or something I should patch. Also, how do you guys deal with vents that are hard to reach above bushes or trees?

I had to custom cut the hardware cloth for each vent, yeah. There’s really no “one size fits all” in my house - every vent was a little different, which was a pain but worth it. As for seeing daylight at the eaves, that’s actually not always a bad thing. Some light means you’ve got airflow, but if it’s a big gap, critters could sneak in. I’m cheap, so I just used a long-handled stapler and a ladder to reach the vents behind bushes - tricky, but beats paying someone. Has anyone tried those vent covers you can install from inside the attic? I’m wondering if they’re worth the money or just another gimmick.

Those vent covers you can install from inside the attic - yeah, I gave those a shot last summer after a squirrel decided my soffit was prime real estate. Honestly, they’re not total junk, but they’re not magic either. The install was way less of a circus act than hanging off a ladder over my rose bushes (which, by the way, have claimed more than one pair of my work jeans). But the fit wasn’t perfect on every vent - had to do some creative “persuasion” with a rubber mallet and a few choice words.

They do block out critters and keep the bugs down, but I noticed airflow dropped a bit compared to just hardware cloth. Not enough to make the attic stuffy, but it’s something. If you’ve got weirdly shaped vents or old framing like I do, expect some fiddling. Price-wise, they’re not cheap, but if you value your shins and dignity more than your wallet, it might be worth it. Otherwise, the long-handled stapler routine is still king in my book... just watch out for those thorny bushes.

if you value your shins and dignity more than your wallet, it might be worth it.

That line cracked me up. I hear you on the price - those covers aren’t exactly a bargain bin find. I tried them after a raccoon family decided my attic was their new Airbnb. They did keep the critters out, but like you said, airflow took a bit of a hit. I’m in an old house with vents that look like they were cut by someone with a butter knife, so “creative persuasion” is putting it mildly.

Honestly, for what they cost, I kind of wish I’d just stuck with hardware cloth and some zip ties. It’s not pretty, but it gets the job done and doesn’t mess with the airflow much. Plus, if one gets wrecked, I don’t feel bad swapping it out.

I guess if you’re not keen on wrestling ladders or risking rose bush attacks, those inside-install covers are decent enough. But for anyone counting pennies (like me), the old-school route still wins... even if it means a few extra scratches and some colorful language.

I get the appeal of hardware cloth and zip ties - cheap, easy to swap, and you don’t feel bad if you have to hack it up to fit those weird old vent shapes. But I’ve seen a few cases where folks went that route and ended up with water blowing in during storms, or the mesh rusting out after a couple seasons. Maybe it’s just our climate (I’m in the Midwest, so we get wild swings), but sometimes the “quick fix” ends up being more hassle down the line.

Have you ever tried the stainless stuff? Costs a bit more up front, but I’ve noticed it holds up way better than the galvanized mesh. Also, I’m curious - did you notice any condensation issues after switching to hardware cloth? Sometimes when airflow changes, especially in older houses, you get weird moisture pockets that can sneak up on you.

Not saying the pricier covers are always worth it, but I’ve seen enough attic rot from “creative solutions” that I’m a little gun-shy about cutting corners now. Still, I get it - sometimes you just need to keep the critters out and move on.