When I swapped out my windows, I didn’t bother with new curtains either—just rehung the old ones and moved on. Honestly, I haven’t noticed much difference in winter comfort, but the noise drop was huge for me too. Did you have any trouble getting the trim to fit right after installing the new frames? Mine needed a lot more shimming than I expected... kind of a pain but worth it.
Trim was the worst part for me, hands down. The new window frames were just a hair smaller than the old ones, so I ended up shimming and caulking way more than I’d planned. Honestly, it still bugs me in a couple spots where it’s just not perfect. Didn’t really notice much difference with heat either—maybe a tiny bit less drafty, but nothing life-changing. The noise drop was real though. Still not sure if I’d bother doing it again unless something actually broke.
Interesting you mention the trim—honestly, that’s where I see most people get tripped up. Even with precise measurements, it’s rare for replacement windows to fit perfectly in older homes. Did you go with wood or PVC for your new trim? I’ve found wood’s more forgiving if you need to tweak things, but it can be a hassle to paint and maintain. Curious if you tried any of the newer expanding foam options for insulation around the frames... sometimes that helps with drafts more than the windows themselves.
Curious if you tried any of the newer expanding foam options for insulation around the frames... sometimes that helps with drafts more than the windows themselves.
Honestly, I’m not 100% sold on the foam thing. Yeah, it fills gaps, but if you overdo it, that stuff can actually warp your frames—especially with PVC trim. I did rigid foam backer rod plus a bead of good caulk instead, and it worked out. Also, PVC is fine, but it feels a bit plasticky to me. Wood’s more work, but I like being able to sand it down if my cuts are off. Guess it depends how picky you are about the finish.
I get what you’re saying about the foam—especially this part:
if you overdo it, that stuff can actually warp your frames—especially with PVC trim.
That’s true, but I think it really depends on the kind of foam you use and how careful you are. The low-expansion window/door stuff is a lot gentler than the old-school spray foam. I’ve done a few windows with it and didn’t have any issues as long as I went light and let it cure before trimming.
I do like backer rod and caulk too, but in my 1920s house, some of the gaps were just too wild for that combo to seal up well. Foam made a noticeable difference in draftiness for me, especially in winter. I hear you on the finish, though—PVC trim doesn’t have the same vibe as wood, but sometimes it’s just easier if you’re dealing with moisture or rot.
Funny thing is, after all that effort, the biggest visual change was just cleaning up the old paint around the frames. The new windows helped, but fresh paint made the rooms feel way brighter.
Funny thing is, after all that effort, the biggest visual change was just cleaning up the old paint around the frames.
- Not sure I agree that foam’s always the way to go for big gaps—sometimes you end up chasing drafts around old framing and it never really seals right.
- “Foam made a noticeable difference in draftiness for me, especially in winter.”
I’ve seen that too, but sometimes dense backer rod with a high-quality elastomeric caulk holds up better long-term, especially if there’s any movement in the wall.
- On PVC trim, yeah, it's easy and rot-proof, but I’ve had clients complain about how it looks after a few years—gets dingy and scratches up faster than wood in my experience.
- Paint touch-ups really do more than people expect... sometimes just a fresh coat makes everything else look new.
Paint touch-ups really do more than people expect... sometimes just a fresh coat makes everything else look new.
I laughed reading this because it’s so true. The year we swapped our old aluminum windows for vinyl, I was all excited to see this big transformation. But after the dust settled (literally), the thing that made people go “wow, what did you do?” was the crisp new paint around the trim. It’s like giving your house a haircut—suddenly everything looks sharper, even if you didn’t change much else.
About the foam vs. backer rod debate: I’ve tried both, and honestly, my 1970s place has some weirdly shaped gaps. Foam worked in the bigger spots, but for anything with movement (like where the siding flexes in the sun), the backer rod + elastomeric caulk combo held up better. Foam can get crumbly or pull away after a couple years if the wall shifts even a little. I learned that one the hard way—drafts found their way back in by the second winter.
PVC trim is a bit of a love/hate thing for me. It’s great for not rotting, especially on the shady side of the house where wood just gets gross. But you’re right, it scuffs up and gets that chalky look after a while. I tried cleaning it with those melamine sponges, which helps, but it never really looks “new” again. If I did it over, I’d probably stick with wood and just stay on top of painting.
Here’s my step-by-step when I did the window swap:
1. Yanked out the old frames (lots of cursing).
2. Checked for weird gaps—filled the big ones with foam, but used backer rod and caulk for anything that looked like it might move.
3. Installed new vinyl windows (with help, because these things are heavier than they look).
4. Touched up all the trim with leftover paint from the garage—suddenly it looked like a new house from the street.
Funny how sometimes it’s not the expensive stuff that gets noticed, but just a little elbow grease and some paint.