I’ve swapped out a few gable fans for roof mounts, and honestly, the noise difference is pretty noticeable—roof mounts tend to be quieter, at least in my experience. Sometimes the old gable fans rattle because they’re not mounted tight or the louvers vibrate. As for venting, if you already have enough intake (like soffit vents), you can usually just swap the fan. But if your attic’s still hot, it might be worth checking if you need more vents overall. Good call on questioning the noise—living with that rattle gets old fast.
I get where you’re coming from on the noise, but I’ve actually had the opposite happen with a roof mount once. The thing was quieter at first, but after a couple years, the motor started humming and it was way harder to get up there and fix compared to a gable fan. Plus, in areas with heavy storms, I’ve seen roof mounts leak if they’re not sealed up just right. Gable fans might rattle, but at least you can usually get to them without crawling across insulation and dodging nails. Just my two cents—guess it depends on what bugs you more: noise or tricky repairs.
That’s interesting you mention leaks with roof mounts. I’ve only worked on a couple, but one was on a low-slope roof and it did have some water stains around the base—guessing the flashing wasn’t perfect. Ever had to reseal one in the middle of summer? Not fun. Gable fans seem easier to swap out if the motor goes, but then again, I’ve heard they can be less effective at pulling air if the attic’s layout is weird. Do you notice much difference in cooling between the two?
I’ve had to reseal a roof mount in July once—sweat was pouring off me before I even got the caulk gun out. I agree, gable fans are way easier to access, especially if you’ve got decent attic space. In my case, though, the roof fan seemed to drop attic temps a bit more, but my attic’s pretty open. Curious if anyone’s tried both on an older house with lots of weird nooks? I wonder if layout makes more difference than fan type sometimes...
Layout definitely matters, especially in older homes with chopped-up attics. I’ve inspected a few where gable fans just couldn’t move air into the dead-end corners, so temps stayed high in those spots. Roof fans can help, but only if you’ve got enough intake vents—otherwise, they’ll just pull conditioned air from the house. If you’ve got weird nooks, sometimes a combo of smaller fans or even passive vents in those areas works better than one big fan. It’s never a one-size-fits-all deal, especially with these old houses.