Good points all around. I've seen similar situations—people adding vents left and right but still having issues. A few things I've learned along the way:
- Placement matters more than quantity—strategically placed vents beat random extras every time.
- Always double-check bathroom and kitchen exhausts; you'd be amazed how often they're venting straight into the attic.
- Spray foam can work wonders, but only if prep and application are spot-on.
Glad you got yours sorted, though... attic moisture can be a real headache.
"Always double-check bathroom and kitchen exhausts; you'd be amazed how often they're venting straight into the attic."
Haha, guilty as charged—I just discovered this exact issue last weekend. Previous owner had the bathroom fan blowing straight into the attic insulation... talk about a DIY fail. 😅 Anyway, now that I've rerouted it properly, I'm curious about spray foam prep. Is it mainly about cleaning surfaces thoroughly, or is there more to it? Still learning the ropes here...
"Anyway, now that I've rerouted it properly, I'm curious about spray foam prep. Is it mainly about cleaning surfaces thoroughly, or is there more to it?"
Cleaning is definitely step one, but there's a bit more nuance to it. Surface prep is critical—make sure everything's dry and free of dust or loose debris. Moisture can really mess with adhesion, so double-check humidity levels too. Also, consider temperature: spray foam adheres best when surfaces are within the manufacturer's recommended range (usually around 60-80°F). I've seen people skip this and end up with foam pulling away later on.
Another tip: if you're spraying onto wood or OSB, check for any gaps or cracks larger than about half an inch. Those should be sealed first with caulk or foam backer rods before applying spray foam. Otherwise, you risk uneven coverage and reduced insulation performance.
Sounds like you're already on the right track though... good catch on the exhaust vent issue. It's amazing how often I find similar DIY shortcuts during inspections—always makes me shake my head a bit.
Good points about humidity and temperature—I learned that the hard way last summer. Thought I'd cleaned everything well enough, but didn't pay attention to the attic temp. It was pushing 90°F up there, and the foam just didn't stick right. Ended up peeling off in spots after a few months... total headache. Definitely worth taking your time to get conditions right before spraying.
"Ended up peeling off in spots after a few months... total headache."
Yep, seen that happen plenty. Attic temps are sneaky—easy to overlook. Also, double-check ventilation; poor airflow can trap heat and moisture, undoing all your prep work. Learned that lesson myself a while back...
