Chatbot Avatar

Window Replacement Assistant

Ask me anything about window replacement!

v1.0.0
Notifications
Clear all

Blackout curtains vs window film for beating the summer heat?

55 Posts
53 Users
0 Reactions
511 Views
cooking855
Posts: 13
(@cooking855)
Active Member
Joined:

Thermal curtains are honestly the sweet spot for me. I tried the full blackout route one summer and felt like I was living in a bat cave—great for naps, not so great when you want to find your coffee mug in the morning. Thermal ones block a decent amount of heat but still let in some light if you don’t close them all the way. Plus, you can just pull them back when it’s cooler or cloudy out.

Window film was kind of a letdown, at least in my place. It cut glare but didn’t do much against that mid-afternoon sun turning the living room into a sauna. The only combo that’s really worked is thermal curtains plus keeping windows cracked at night to let cooler air in, then closing everything up before it heats up again. Not perfect, but better than sweating through another July.

Honestly, anything beats wrestling with sticky foam strips—those things haunt my dreams...


Reply
cars265
Posts: 13
(@cars265)
Active Member
Joined:

Totally agree about those sticky foam strips—those things are like wrestling with a giant, angry fruit roll-up. I tried them once in our guest room and ended up with more foam stuck to my hands than the window.

I’m with you on thermal curtains being a solid middle ground. We swapped out our old thin curtains for thermal ones last year, and it made a noticeable difference. It’s nice not having the place feel like a cave 24/7 but still keeping some of the afternoon heat out. I actually like having a little natural light in the mornings, too. Blackout is just too much unless you’re working night shifts or something.

Window film was kind of “meh” for us as well. It helped with glare on the TV, but didn’t do much for the heat—maybe our windows are just too old? Anyway, your trick about cracking the windows at night is gold. We do that too, and it makes sleeping way more tolerable during those muggy nights.

If only there were a way to keep things cool that didn’t involve sacrificing either sunlight or your sanity...


Reply
matthew_artist
Posts: 8
(@matthew_artist)
Active Member
Joined:

I actually had better luck with window film than I expected, but maybe it’s just because our house faces west and the afternoon sun is brutal. The film we used was the reflective kind, and it did cut down on heat—though yeah, it’s not perfect. I get what you mean about wanting some natural light, though. Blackout curtains just make me feel like I’m living in a bunker. For us, a combo of sheer curtains plus the film worked out okay. Not sure if that’s just beginner’s luck or what...


Reply
Posts: 14
(@jerryc59)
Active Member
Joined:

Yeah, I’ve had a similar experience—window film is surprisingly effective, especially when you’re dealing with direct sun in the afternoons. I live in an older brick house and the west-facing windows used to turn my living room into an oven by 4pm. Tried those blackout curtains for a while, but honestly, they made the whole space feel gloomy and sort of claustrophobic after a few days.

I ended up layering reflective film with some lightweight linen curtains. It’s not perfect (still get a bit of glare), but it keeps most of the heat out while letting in enough daylight so it doesn’t feel like a cave. One thing I’d say is, don’t cheap out on the film—some of the budget brands peeled after one summer, which was a pain to scrape off. Also, if you’ve got double-pane windows, check if the film is compatible; some types can mess with the seal or cause cracks over time. Not everyone mentions that.

Honestly, I think it’s all about finding what feels right for your space. For me, I’ll take a bit of extra light and slightly higher temps over sitting in the dark all summer...


Reply
toby_cloud
Posts: 10
(@toby_cloud)
Active Member
Joined:

For me, I’ll take a bit of extra light and slightly higher temps over sitting in the dark all summer...

I hear you on that—total blackout just feels weird after a while. Have you tried any of those “smart” films that switch opacity? I’m tempted, but worried they’re more hype than help. Also, anyone else notice wifi signals acting up with some reflective films, or is that just my old router acting cranky?


Reply
cphillips20
Posts: 11
(@cphillips20)
Active Member
Joined:

total blackout just feels weird after a while

Yeah, I get that. I’ve installed a few of those smart films for folks and honestly, they’re cool in theory but can be finicky—sometimes the wiring or remote acts up, and they’re not cheap. Personally, I like a good compromise with light-filtering film. About wifi, reflective films can mess with signals if you’ve got older gear or thick walls. Had a client swear his internet tanked after we put up mirrored film... turned out it was half the router’s fault, half the film. Sometimes it’s just trial and error.


Reply
Posts: 23
(@crafter19)
Eminent Member
Joined:

Had a client swear his internet tanked after we put up mirrored film... turned out it was half the router’s fault, half the film. Sometimes it’s just trial and error.

That’s pretty much my experience too. Reflective films can absolutely cause weird issues, especially if your router’s already struggling or you’ve got a lot of brick or metal in the walls. I’ve seen people get frustrated thinking it’s just the film, but it’s usually a combo of things.

On the blackout vs. window film debate—blackout curtains do block heat pretty well, but like you said, “total blackout just feels weird after a while.” Most folks end up leaving them open half the time, which kind of defeats the purpose. Films are more set-and-forget, but not all are created equal. The really dark stuff can make your place feel like a cave and might even void some window warranties if you’re not careful.

If you want to split the difference, there are solar control films that cut glare and heat without making your room pitch black. They’re not perfect—installing them on older windows can be tricky—but for most people, it’s less hassle than messing with heavy curtains all summer. Just double-check your wifi before committing to anything super reflective... learned that one the hard way myself.


Reply
Posts: 16
(@astronomy584)
Active Member
Joined:

Just double-check your wifi before committing to anything super reflective... learned that one the hard way myself.

Haha, I had a similar “oops” moment. Tried a mirrored film in my old apartment and suddenly my bedroom became a dead zone for streaming. Ended up moving the router twice before realizing it was bouncing signals everywhere but where I needed. I do like how films keep things cooler, but honestly, I miss being able to open a curtain and just let the sun in when I want. Curtains are clunky, but at least you can just yank them aside. There’s gotta be a happy medium…


Reply
Posts: 11
(@rayp25)
Active Member
Joined:

That’s the main thing that bugs me about window films—once they’re up, you pretty much lose the option to just let the sun pour in. With blackout curtains, at least you can pull them back and get full light if you want. I’ve tried the “compromise” route with thermal cellular shades, which block a fair bit of heat but aren’t as heavy as blackout curtains. They still let some light through, but not direct sun, and don’t mess with wifi as much. Not perfect, but less hassle than peeling film off glass...


Reply
jose_sage
Posts: 2
(@jose_sage)
New Member
Joined:

- Totally get the frustration with window film being a “set it and forget it” thing. Once it’s on, you’re stuck with that level of darkness unless you want to risk scraping it off.
- I’ve run into similar issues—my living room faces west, so in summer it’s like an oven. Tried the static cling film for a bit, but hated how it dulled everything all day.
- Blackout curtains are a bit more flexible, but I found them kind of bulky and annoying to keep open neatly. Plus, if you have radiators or furniture under the windows, they get in the way.
- Ended up going with dual-layer cellular shades—light filtering for daytime, plus a pull-down blackout layer for heatwaves. Not perfect either, but at least I can switch modes depending on the weather.
- Wifi interference is real with some films, especially those with metallic coatings. Surprised more people don’t mention that.
- If you ever want to open windows for airflow, curtains or shades definitely win over fixed film. Just depends how much you want to mess with your setup...


Reply
Page 5 / 6
Share: