- Noticed the same with ridge vents—on my last job, they barely helped in a muggy summer.
- Attic fans worked better after we sealed up every gap, but I still worry about negative pressure pulling in more humid air.
- Anyone ever try powered vents with humidistats? Curious if that’s overkill or actually helps with splitting and ice dam issues...
Had a similar experience with ridge vents not doing much in the sticky summers here in the Midwest. Even after adding more insulation, we still got some splitting on the south-facing side. I get what you mean about attic fans—after sealing up the attic, ours helped with temps but I was always a bit paranoid about pulling in humid air from the basement or crawlspace.
Anyone ever try powered vents with humidistats? Curious if that’s overkill or actually helps with splitting and ice dam issues...
I actually tried a solar-powered vent with a humidistat last year. Wasn’t cheap, but it did seem to keep things drier up there during those muggy stretches. Noticed less warping on the sheathing, and our ice dams weren’t nearly as bad this winter. Still had to watch for drafts around the eaves though—if you don’t seal those up tight, it kind of defeats the purpose.
If you’re thinking about powered vents, I’d just double-check your air sealing first. Otherwise, you might just be cycling humid air in and out like you said. It’s not magic, but it did help us more than just passive venting alone.
If you’re thinking about powered vents, I’d just double-check your air sealing first. Otherwise, you might just be cycling humid air in and out like you said.
That’s spot on—air sealing is really the foundation here. I’ve seen folks jump straight to powered vents or even dehumidifiers, but if the attic isn’t sealed up tight, you’re just moving the problem around. It’s a pain, but crawling around with a can of foam and some weatherstripping made a bigger difference for me than any fan. Powered vents with humidistats can help, but only after you’ve tackled those leaks. It’s not overkill if you’ve got persistent moisture, especially in the Midwest.
Really appreciate seeing someone else put air sealing first. I know powered vents get all the attention, but honestly, sealing up those weird little gaps made a bigger dent in my attic humidity than anything else. It’s tedious work, but it pays off. Have you noticed any impact on your energy bills since you did it? I found my AC wasn’t running nearly as much after I sealed up the attic floor.
I totally get what you mean about air sealing making a bigger difference than fancy vents. I spent a couple weekends crawling around with a caulk gun and some spray foam, and yeah, it was tedious. But my electric bill dropped by about 15% after, which honestly surprised me. The house just feels less drafty now, too. I still get a bit of humidity in the attic during those muggy weeks, but nothing like before. Powered vents seemed cool at first, but I’m not convinced they’re worth the hassle unless you’ve already sealed everything up tight.