That’s a spot-on observation about vent placement. I’ve been called in to consult on a few “green” retrofits where folks tried to maximize insulation and air sealing, but ignored how critical that airflow path is—especially with dense-pack cellulose or spray foam. One project comes to mind: beautiful old house, but after they sealed it tight, attic humidity shot up and the rafters started sweating. We had to retrofit baffles and clear out the soffits just to get things back under control. It’s always tempting to chase energy efficiency at all costs, but like you said, you can’t ever forget the house needs to breathe. I’d rather sacrifice a couple R-values than deal with structural headaches down the line.
That’s a good reminder about not overdoing the air sealing. I’ve seen folks get so focused on packing in insulation that they forget about soffit vents or block them by accident. When I was helping my uncle redo his attic, we made sure to install baffles first—just those simple foam channels—to keep the airflow from the soffits up to the ridge vent. It wasn’t fancy, but it made a huge difference in keeping things dry and stable up there. Sometimes it’s just about getting those basics right before worrying about squeezing in every last bit of R-value.
Sometimes it’s just about getting those basics right before worrying about squeezing in every last bit of R-value.
Totally agree—people get so hung up on maxing out insulation that they forget airflow matters just as much. Curious, did you notice any difference in your energy bills after adding the baffles and keeping the vents clear? I’ve seen mixed results depending on attic size and roof pitch.
people get so hung up on maxing out insulation that they forget airflow matters just as much
I get where you're coming from, but sometimes I wonder if airflow gets a bit overhyped too. In my case, after switching to a green roof system, I barely touched the vents and still saw a drop in attic temps. Maybe it’s not one-size-fits-all? Roof type seems to change everything.
Maybe it’s not one-size-fits-all? Roof type seems to change everything.
That’s been my experience too. After a hailstorm trashed my old asphalt shingles, I went with a standing seam metal roof. I figured airflow would be the big fix, but honestly, just swapping the roof type made a bigger difference than fiddling with vents ever did. Insulation helped, sure, but the new roof alone dropped attic temps by 10 degrees. Sometimes the “rules” don’t fit every house, especially when storms force you to rethink everything.