Honestly, I’ve had mixed results with the whole cardboard shield and tape method. Maybe it’s just my luck, but half the time the foam still finds a way to sneak around the edges or stick to the tape, and then you’re peeling off bits of dried foam with the tape anyway. What’s worked better for me is using a low-expansion foam—less mess and way more control, especially around window frames where you don’t want things bowing. It costs a bit more, but I’d rather pay a few extra bucks than spend an hour scraping dried blobs off the hardwood.
One trick I picked up (after making a mess on my first window swap) is to start with tiny bursts in the gaps, then walk away for 10 minutes. That stuff expands way more than you think, and it’s easy to overdo it if you’re not careful. Also, I stopped trying to fill every single gap in one go. It’s tempting to just blast it in and move on, but patience saves you from headaches down the line.
I get the appeal of taping everything off, but sometimes I feel like by the time I’m done prepping, I could’ve just been more careful with the nozzle and saved myself the hassle. Just my two cents. Anyone ever try those foam applicator straws you can bend? I found them easier to aim, especially in tight spots behind trim.
Anyway, swapping out the windows taught me that cleanup is part of the “real price” too—not just what you pay at the store. The hidden costs are always in the details.
That’s spot on about the hidden costs creeping up—my last window swap with the V-2500s turned into a bigger project than I’d planned, mostly because of cleanup and those tiny details. I used to be all about taping off every possible surface, but I swear, the foam still found a way to get somewhere it shouldn’t. The “bendable” straws are a game changer in tight spots, but I managed to snap one mid-job and had to MacGyver it with painter’s tape. Not my proudest moment.
I’ve also noticed the low-expansion foam makes a big difference, especially with older trim that isn’t perfectly square. For me, taking it slow and being stingy with the foam has saved a lot of aggravation. I do get tempted to just blast it in and call it done, but then I remember scraping dried foam off my oak sills for an hour and think twice.
Funny thing—my neighbor swears by using a plastic spatula to catch drips as he goes. I tried it once and just ended up with a sticky spatula, but maybe I was doing it wrong. Anyway, totally agree, the “real price” is way more than just what’s on the receipt.