- Had a raccoon rip off a vent cover once—didn’t even realize until tenants complained about a weird smell.
- Ended up with a mess and a minor leak, so I’m with you on the regular checks.
- Metal covers seem to hold up better, but sometimes installers just use plastic because it’s cheaper.
- Not sure pest-proof covers are totally foolproof, but they’re better than nothing.
- I do seasonal walk-throughs now... still surprised by what turns up after a windy night.
Metal covers seem to hold up better, but sometimes installers just use plastic because it’s cheaper.
You’re spot on—plastic’s tempting for cost, but it just doesn’t last, especially if critters are around. I’ve seen squirrels chew right through them, too. What’s worked for me: swap out any plastic covers for galvanized steel, and always check the fasteners after storms. Doesn’t make things bulletproof, but you’ll avoid most of those “surprise” leaks. Regular walk-throughs are a game changer—caught a loose vent myself last fall before it turned into a bigger headache.
Galvanized steel covers are definitely more durable, but I’ve noticed sometimes folks skip sealing around the base. That’s where water sneaks in, especially after a windy rain. What I usually do: remove the old cover, scrape off any cracked sealant, then set the new metal cover with a bead of high-quality roofing sealant. Fasten it down tight, but don’t overtighten—warped metal can actually let water in. Quick check after every big storm helps too... caught a loose one last spring before it became a real mess.
Can’t tell you how many times I’ve seen water sneak in right at the base, just like you said. Folks assume the metal itself is enough, but if you don’t get that sealant bead just right—or skip it altogether—wind-driven rain will find its way in every time. I had a job last fall where the homeowner thought their new galvanized vent was bulletproof, but they’d used a cheap caulk and didn’t prep the surface. By spring, there was rust on the sheathing and a nice patch of mold in the attic.
What’s worked for me: after pulling the old cover, I always wire-brush the flashing area, then wipe it down so the sealant sticks. I use a polyurethane roofing sealant since silicone can peel off metal over time. When fastening, I alternate sides to keep things level—if you crank one side down too hard, you’ll warp it and open up gaps. Quick visual check after storms is key, especially if you’re in a spot with lots of wind gusts.
Honestly, it’s those little steps that save you from big headaches later... Learned that the hard way more than once.
Honestly, it’s those little steps that save you from big headaches later... Learned that the hard way more than once.
Couldn’t agree more. I skipped the “wipe down” part once—figured dust wouldn’t matter. Big mistake. Ended up with a mini waterfall in my attic after the first real storm. Poly sealant’s worth every penny, but prepping is king if you’re on a budget like me.
