Had a similar situation in a split-level from the ‘70s—folks always want to talk smart thermostats, but honestly, the biggest difference came after I tore out the old weatherstripping and put in new stuff around every window and door. You’re right about south-facing windows being more consistent for winter warmth. I’ve seen clients with big west-facing glass complain about rooms being ice-cold in the morning, then roasting by 3pm. South-facing is steadier, but if you’ve got old single-pane windows or gaps, you’re just leaking heat anyway. Heavy curtains at night are underrated—cheap fix that actually works.
I’ve got a 1965 ranch with a mix of original windows and a couple I replaced, and the difference in winter comfort is pretty noticeable depending on orientation. South-facing windows definitely make things steadier—on sunny days, the living room (which has two big south-facing sliders) picks up enough warmth that I can actually turn the heat down a notch by late morning. But I’ll admit, it’s only really effective after I went around and replaced all the brittle weatherstripping and added some caulk in the worst spots. Before that, it was like trying to heat a tent.
West-facing glass is a whole different animal. The guest bedroom faces west and it’s always freezing first thing, then by mid-afternoon it’s almost stuffy—unless it’s cloudy, and then it just stays cold. I tried the smart thermostat route, but honestly, it couldn’t keep up with the swings. Heavy curtains help a lot at night, like you said, especially if you pull them shut before sunset. I used to think they were just for privacy, but there’s a real difference in how much the rooms cool off overnight.
One thing I’d add—if you’re dealing with older single-pane windows, even the best orientation won’t save you from drafts. We had one window that rattled in the wind… no amount of sunlight could fix that. Ended up swapping it for a double-pane unit last winter, and suddenly the room felt like part of the house again.
I get why people like gadgets and new tech, but for me, basic air sealing and paying attention to window direction made a bigger impact than any “smart” upgrade. Sometimes the low-tech fixes are the ones you feel the most.
It’s interesting how much orientation matters, but you’re spot on—none of it works if the windows are leaky. I’ve found that even with double-pane upgrades, if I skip the air sealing, drafts still sneak in around the frames. Have you ever tried thermal curtains or cellular shades? I was surprised by how much those helped on my east side, especially during those single-digit nights. Wondering if anyone’s had luck with interior storm panels or is that more hassle than it’s worth...
Funny you mention interior storm panels—I actually tried those in my old drafty place. They worked okay, but honestly, getting a tight fit was kind of a pain and I kept misplacing the little clips. Have you noticed if your thermal curtains mess with condensation on the glass? I always wondered if trapping that extra air made it better or worse for moisture buildup...
I've had the same issue with thermal curtains—sometimes I end up with more condensation, especially on really cold nights. I think it’s because the warm air from inside can’t circulate against the glass as much. Have you ever tried cracking the curtain open a bit during the day to see if it helps? I’m still experimenting. Also, curious if anyone’s noticed a difference between east and south windows for this... my east-facing ones seem less prone to moisture, but maybe that’s just me.