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Choosing between attic fan setups: roof or gable mount?
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I put in a roof-mounted solar attic fan last summer, mostly because my 1950s ranch didn’t have a gable vent to work with. It’s been decent - keeps the attic a bit cooler, and I think my AC runs less. But I’ve noticed it’s a pain to check or clean, and I’m always a little nervous about leaks since it’s right through the shingles. My neighbor went with a gable mount (he already had the vent), and he swears by it - says it was way easier to install and less risk of water issues.
I’m in central Texas, so lots of sun and heat. My roof’s asphalt, low pitch, not huge. Wondering if anyone’s had both types and noticed a big difference? Is the gable mount really that much better for maintenance and leaks, or am I just being paranoid about my roof? Curious if the airflow is as good too, since it’s not up top.
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Curious if the airflow is as good too, since it’s not up top.
I get where you’re coming from. Cutting through shingles always makes me a bit uneasy too, especially with Texas storms. The gable fans are definitely easier to access for cleaning, but I’ve heard mixed things about airflow - depends a lot on attic shape and how well your soffits are vented. Roof mounts pull hot air from the highest point, which can be more efficient, but yeah, maintenance is trickier. If you’re not seeing leaks now, you probably did the flashing right, but I’d keep an eye on it after heavy rain just in case.
Cutting through shingles always makes me a bit uneasy too, especially with Texas storms.
Man, you’re not kidding about Texas storms. I’ve seen more than a few “DIY” roof fans turn into indoor waterfalls after a good hailstorm. I get the appeal of gable fans - climbing up there to clean a roof mount is basically my cardio for the week - but I’ve noticed some attics just don’t move air well unless you’re pulling from the very top. Had a client last summer with a low-pitch roof and gable fans, and it was still hotter than a sauna up there.
Curious - anyone ever try running both at once? I’ve heard mixed things about that, like it can mess with airflow if your soffits aren’t up to snuff. Or maybe that’s just one of those “my cousin’s neighbor’s uncle said” kind of deals...
Running both gable and roof fans at the same time can actually backfire, especially if your soffit vents aren’t providing enough intake. I’ve seen setups where the roof fan just pulls air from the gable vent instead of the soffits, so you end up recirculating hot air rather than pulling in cooler outside air. Sometimes, less is more - one well-placed fan with proper intake usually works better than doubling up. If the attic’s still roasting, it’s often an intake issue, not a fan issue. Texas heat just makes any attic a challenge, though...
Running both gable and roof fans at the same time can actually backfire, especially if your soffit vents aren’t providing enough intake.
I get the worry about leaks - cutting into a roof always makes me second guess, especially with Texas storms. I went with a gable fan on my last house (had the vent already), and it was way easier to swap out when it died. Cleaning was just a ladder job, not crawling on the roof. Airflow seemed fine, but my attic was smaller. Honestly, if you’ve already got the roof fan in, I’d just keep an eye on it and maybe beef up your soffit vents if you’re still seeing heat build-up. The hassle of patching a roof hole isn’t cheap or fun.
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