I get the logic behind sticking to the R-value charts, but honestly, I think there’s sometimes more wiggle room than people admit. My place is in a northern zone and I went a bit above code—just a couple extra inches of blown-in cellulose. It made a noticeable difference in winter drafts and my heating bill dropped. Haven’t had moisture issues, but I was careful about baffles and venting. Maybe it’s not “worth it” on paper, but comfort counts too, right? Guess it depends how picky you are about cold spots and bills...
I’m with you—sometimes the code minimum just isn’t enough, especially up north. I added extra cellulose too, but I learned the hard way about skipping baffles... ended up with a frosty attic one winter. Lesson learned: more insulation’s great, but airflow’s gotta be right or you’re just trapping problems. Comfort’s worth a little extra effort, though.
Lesson learned: more insulation’s great, but airflow’s gotta be right or you’re just trapping problems.
I get where you’re coming from, but honestly, I’m not convinced that going above code is always worth the extra cash—especially if you’re on a tight budget. I did the bare minimum up here in central Maine, and yeah, it’s not toasty-warm in the attic, but my heating bills didn’t jump like I expected. I skipped the fancy baffles and just made sure the soffit vents weren’t blocked. Maybe it’s not perfect, but I haven’t had ice dams or frost issues (knock on wood).
I guess what I’m saying is, sometimes “good enough” really is good enough if you’re careful about airflow. I’d rather save that money for something else—like replacing my ancient water heater. Not saying more insulation’s bad, but for me, the returns just didn’t seem worth it after a certain point. Maybe it depends on how drafty your house is to start with...
I guess what I’m saying is, sometimes “good enough” really is good enough if you’re careful about airflow.
I hear you, but in my experience, “good enough” can come back to bite you if the weather takes a turn. I went with just code-minimum insulation in my old house, and it was fine for a couple years—then we got one of those long, wet winters and suddenly I had condensation and a bit of mold up there. Ended up spending more fixing that than if I’d just beefed up the insulation from the start. Guess it depends a lot on the quirks of your place, but I’ve learned to err on the side of overdoing it, especially with older homes.
Guess it depends a lot on the quirks of your place, but I’ve learned to err on the side of overdoing it, especially with older homes.
That’s fair, but I’ve seen it go both ways. My uncle’s place is a 70s ranch with just code-minimum insulation and decent soffit vents—never had a problem, even through some nasty winters. Meanwhile, my neighbor went all-in on insulation and still got condensation because his ridge vent was half-blocked by old insulation baffles. Sometimes it’s less about how much you add and more about making sure what you’ve got actually works together.
I get wanting to play it safe, especially if you’ve dealt with mold before. But I’d say double-checking airflow and sealing up weird gaps can be just as important as piling on more insulation. Every attic seems to have its own personality... what works in one can totally flop in another.