South-Facing Vs. East/West Windows for Winter Warmth - Which Works Better?

- Had the same “new windows = instant warmth” dream. Reality check: nope.
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“South windows heat up fast in the afternoon for me too, but at night, all bets are off.”

Bubble wrap actually isn’t the worst idea - tried it on my old rental once and it did help with drafts, but yeah, it looked like I was prepping for a science fair. Honestly, I get more cold air from the walls than the windows half the time. South-facing windows are great when the sun’s out, but once it’s gone, it’s just cold glass. I’ve found those cheap window insulation kits (the ones you shrink with a hair dryer) work better than towels or heavy curtains, at least for me. Still, nothing’s perfect in these drafty old places...

Those window kits are a lifesaver in old rentals - used them last winter and was surprised at how much of a difference they made. I get what you mean about the walls, though. Sometimes I’ll run my hand along the plaster and feel a breeze, no joke. For the south-facing windows, I try to time opening and closing curtains with the sun, but honestly, once it sets, even double layers don’t cut it. If you haven’t tried foam weatherstripping around the frames, it’s a cheap fix that helped me a bit. Drafty places just have their own... personality, I guess.

Never tried foam weatherstripping, might give that a shot. South windows definitely help with sun, but honestly, my west-facing ones get crazy hot in the afternoon and then freezing at night. Anyone actually notice a big difference between east and west for heat during winter?

I totally get what you mean about west-facing windows - mine practically turn the living room into a sauna by late afternoon, then it’s like an icebox after sunset. Honestly, I haven’t noticed much warmth from my east windows in winter, but maybe that’s because the morning sun isn’t as strong? South-facing definitely seems to win for steady daytime heat, at least in my place. Curious if anyone else actually gets more benefit from the east side...

- Totally agree, south-facing windows are the MVP for steady warmth - mine keep the main room comfortable most of the day.
- West-facing can be brutal with that late sun... I had to get blackout curtains just to keep from roasting in summer.
- East windows are nice for a gentle wake-up, but in winter, I barely notice any real heat gain. Maybe if you’re up super early?
- If you want to maximize winter warmth, I’d focus on the south side like you’re doing. That’s what made the biggest difference for me after a few tweaks.
- Good call noticing how quickly west rooms cool off after sunset. Insulation helps, but it’s always a battle.

South-facing windows really do most of the heavy lifting in winter. I’ve got a 1950s ranch, and after swapping out my old single-pane south windows for low-E double panes, I noticed the difference right away - sunny afternoons meant the heat actually kicked on less. That said, if you don’t have good insulation or you’ve got drafty frames, even the best orientation won’t save you from chilly mornings.

West-facing windows are a mixed bag. I like the natural light for a few hours in the evening, but honestly, in July it’s like living in a greenhouse. Blackout curtains help, but if you forget to close them before the sun hits, you’re basically cooking dinner in a sauna. In winter, though, I barely notice any warmth from the west side - sun’s too low and sets early, so not much of a gain for comfort.

East-facing is kind of “meh” for me. I’m up early for work, but by the time the sun’s actually strong enough to do anything, I’m already out the door. Maybe if you’re home in the morning it’s worth considering, but I wouldn’t rely on it for real heat.

One thing I’ll add - if you’re serious about keeping heat in, make sure your south-facing windows have decent thermal curtains for nighttime. Even with new windows, you lose a lot of heat after dark if you leave them bare. My utility bills dropped a bit once I started closing up at sunset.

Funny enough, after all my upgrades, it’s still the old north windows that chill the place down. No sun, just cold drafts... can’t win them all.

Interesting, I’ve actually done thermal imaging on my place (1968 split-level) and the south windows are always noticeably warmer in winter, but like you said, it all fell apart until I sealed up the frames. Have you tried window film for your north side? Mine made a surprising difference for drafts. Wonder if storm windows would help even more...

Window film definitely helps with drafts, but I’ve noticed it’s only as good as the seal around the window itself. On my own 70s ranch, I tried film on the north-facing windows last winter - cut down on the chill, but the real game-changer was adding exterior storm windows. The air gap between panes seems to buffer temperature swings even more than I expected. Only downside is the extra maintenance... sometimes those storms fog up if the seals aren’t perfect. Anyone else run into that?

I actually tried the storm window thing last year, but honestly, I got tired of fighting with the condensation. Maybe I’m just lazy, but I’d rather slap on some thick curtains and call it a day. Not as fancy, but way less hassle.

Curtains really do the trick, especially if you get the heavy thermal kind. I’ve tried both routes - storm windows and thick curtains - and honestly, I stick with curtains now for the same reason. Less fuss, and I can swap them out when it warms up. If you want a bit more warmth, I sometimes roll up an old towel and stick it at the base of the window to block drafts. Not pretty, but it works. Storm windows are great in theory, but yeah... that condensation is a pain to keep up with.

- South-facing windows usually win for winter warmth, at least in my place. The sun’s lower in the sky, so you get more direct light all day. East/west windows are hit or miss - morning or evening sun, but not much in between.
- Tried those thick thermal curtains too. They help, but if you’ve got old leaky frames (like my 1950s ranch), you’re still gonna feel drafts unless you really seal things up.
- I did storm windows one year. Honestly, the condensation drove me nuts. Constant wiping, and I swear it made the room feel damp sometimes.
- Rolling up a towel at the base is classic. Not pretty, but nobody’s judging when it’s freezing out.
- One thing I noticed: on sunny days, leaving the curtains open on south windows actually heats the room way more than anything else I’ve tried. But as soon as that sun dips, gotta close ‘em fast or you lose all that heat.
- If your main goal is to keep things cozy without a lot of hassle, south-facing and heavy curtains is probably your best bet. East/west just never gave me much bang for my buck unless I was up early enough to catch that morning sun - which, let’s be real, rarely happens.

You nailed it - south-facing is where it’s at for winter warmth, no contest. I’ve seen so many folks underestimate just how much heat you can trap from that low winter sun. You’re right, though: if your frames are leaky, even the fanciest curtains won’t save you from drafts. Sometimes I tell people, before you invest in heavy curtains or storm windows, fix those frames and seals first. Otherwise, you’re just putting a Band-Aid on it. And yeah, towels at the base... ugly as sin, but they work when you’re in a pinch.

I hear you on the towels - ugly, but desperate times, right? I’ve lived in a few older homes and it’s wild how much difference a tiny draft makes. But here’s my thing: what about those west-facing windows? I get that south is king for winter sun, but I swear my west windows cook the place in late afternoon, even in January. Anyone else notice that, or am I just unlucky with my lot orientation?

I get what you mean about the west windows - mine turn the living room into a greenhouse by 3pm, even when it’s freezing outside. I’ve always heard south-facing is best for passive solar, but honestly, those late-day rays from the west can be brutal. Maybe it’s just how the sun hits certain layouts? I tried blackout curtains last winter and it helped a bit, but then I lost all the light. Is there really any perfect orientation, or is it always a tradeoff?

Totally hear you on the west sun - my old apartment had giant west-facing windows and it was like living in a toaster after 2pm, even in January. South-facing is usually ideal for steady winter warmth since the sun’s lower and you get that nice, even heat all day, but layouts can really mess with theory. What worked for me: I swapped blackout curtains for thermal shades that I could pull halfway, so I didn’t lose all the light but still cut down on the heat blast. There’s always a bit of give and take... I don’t think there’s ever a “perfect” orientation unless you’re building from scratch and can plan everything.

Totally agree about the theory vs. real life - my last place had south-facing windows, but the living room was set way back so barely any sun actually reached inside. I ended up adding reflective window film plus cellular shades, which helped balance light and warmth without losing too much brightness. If you’re stuck with west-facing, I found exterior awnings surprisingly effective, though they’re not cheap... definitely a tradeoff.

Reflective film is a smart move - I’ve seen it make a noticeable difference, especially when you’re not getting direct sun anyway. Awnings can be a game changer for west-facing windows, but yeah, the upfront cost can sting. I’m curious, did you ever try interior thermal curtains? I’ve had a few clients swear by them for winter warmth, though I’m never sure how much heat loss they actually prevent compared to other options.

- Tried thermal curtains last winter - honestly, I *think* they helped, but it’s hard to tell if it was the curtains or just my wishful thinking (or maybe the extra socks).
- My place is mostly east/west windows, and I notice the west-facing ones bleed cold air at night, even with the curtains drawn. South-facing gets that nice sun hit during the day, but only when it’s not gloomy out.
- The reflective film was a bigger win for me in summer than winter. In winter, it’s like... sure, it keeps heat in, but you’re also blocking some of the sun you actually *want* to come through.
- Awnings looked cool in the catalogs, but after seeing the price, I just laughed and closed the tab.
- If you’re looking for a quick fix, I’d say thermal curtains are worth a shot, but don’t expect miracles. They’re more like an extra sweater for your windows than a full-on parka.

Still figuring out if I should bother with window upgrades or just keep piling on blankets.

I’ve been down this rabbit hole too, and I get what you mean about thermal curtains feeling more like a “maybe” than a guarantee. I put them up in my 70s-era living room, and yeah, it helped a bit, but I still felt the draft near the west-facing windows at night. Sometimes I wonder if it’s just the old window frames doing their thing.

South-facing windows are definitely the MVP for winter warmth - on sunny days, anyway. But where I live (Pacific NW), those sunny days are rare from November through February. Some folks swear by bubble wrap for extra insulation on the glass, but honestly, it looks pretty weird from the street.

I did a DIY caulk and weatherstripping job last year, and that made a bigger difference than any curtain or film. Not glamorous, but less expensive than new windows or fancy awnings. If your windows are really leaky, maybe try that before shelling out for upgrades? Sometimes it’s just about plugging the worst gaps and accepting you’ll always need an extra blanket or two...