I hear you on the subtle difference. I did something similar a couple years back—slapped some foam board on the attic hatch, sealed it up, and waited for my heating bill to magically drop. Didn’t really happen. Like you said, plugging the obvious gaps around the trim and even the light fixtures made a way bigger impact.
One thing I’ve always wondered: has anyone tried one of those insulated attic tents or covers instead of just foam board? I keep seeing them online, but I’m skeptical they’re much better than a good DIY job. Also, curious if anyone’s noticed more condensation or moisture issues after sealing things up tight. I had a buddy who went overboard with spray foam and ended up with a mini rainforest in his attic... not ideal.
Guess it all comes down to where your biggest leaks are. Anyone else ever regret going too far with the sealing?
Tried one of those attic tents a while back after getting tired of wrestling with foam board every time I needed to get up there. Honestly, it was a little easier for access, but I didn’t notice any huge difference in comfort or bills compared to my old DIY setup. As for moisture, yeah, you can definitely go too far—my neighbor sealed his attic up so tight he ended up with mold on the rafters. Gotta let the house breathe a bit or you’re just trading one problem for another.
Gotta let the house breathe a bit or you’re just trading one problem for another.
That’s what keeps tripping me up with all this attic stuff. I slapped some foam board on my hatch last fall (just duct taped it, nothing fancy), and yeah, it stopped the draft a little, but honestly I couldn’t say my heating bill noticed. Maybe my expectations were too high? Or maybe my leaky windows are the bigger culprit.
The whole “let the house breathe” thing is real though. My uncle went all-in on air-sealing his attic, and now his bathroom fan drips in winter. Mold city. It’s like a weird balancing act—block enough cold out, but not so much your house turns into a science experiment.
Is there some secret formula for this? Or is it just trial and error with insulation and hoping you don’t end up with mushrooms growing overhead?
I totally get where you’re coming from. I did the same thing with my attic hatch—just slapped some foam board up there and called it a day. It helped with the draft, but honestly, my heating bill barely budged. Turns out, my old windows were leaking like crazy too, so maybe that’s where most of my heat was escaping.
The “let the house breathe” thing is real, though. My neighbor sealed up every nook and cranny in his attic one year, and suddenly he had condensation dripping down his walls in weird places. It’s like you fix one problem and create another if you’re not careful.
I don’t think there’s a magic formula. Every house is different—age, climate, how it was built... all that stuff matters. For me, it’s been a lot of trial and error (and a few YouTube rabbit holes). I’d say keep plugging away at the obvious leaks first—windows, doors, attic hatch—and just watch for any weird moisture issues. If mushrooms start popping up, then yeah, maybe time to rethink things.
I hear you on the “let the house breathe” thing. I once got a little too enthusiastic with spray foam and ended up with a weird musty smell in my hallway—turns out I blocked off a vent I shouldn’t have. The foam board on my attic hatch did cut down the draft, but like you, my bills didn’t really move until I tackled the old windows. Seems like it’s always a game of whack-a-mole with these old houses... patch one spot, find another leak. Just gotta keep an eye out for funky smells or moisture and not go overboard sealing everything up tight.
