First off, measure twice...no, scratch that, measure like five times. Seriously, windows aren't forgiving. Learned that the hard way. Also, shims are your friend—don't skimp on them. Anyone got smarter tricks or shortcuts they've figured out?
Can't argue with measuring obsessively—been there, done that. But honestly, one thing I've found even more helpful is doing a dry fit before you commit. Sounds obvious, but you'd be surprised how many little issues pop up when you're actually holding the window in place. I learned this after wrestling with a window that measured perfect on paper but refused to cooperate once it was halfway in. Also, don't underestimate how much a good caulk job matters. I've seen beautiful window installs ruined by sloppy caulking—it's worth taking your time and practicing on scrap if you're unsure.
And speaking of shims, totally agree they're essential, but make sure you get composite ones instead of wood. Learned the hard way when I had to redo a window frame after wooden shims soaked up moisture and expanded. Composite shims are worth the extra few bucks, trust me.
Windows are definitely one of those projects that seem straightforward until you're knee-deep into it, muttering under your breath...
Composite shims are nice, but honestly I've used wood ones plenty of times without issues. If you seal everything properly and keep moisture out, wood shims hold up just fine. Maybe it's more about installation technique than shim material...?
Yeah, you're onto something there. I've seen plenty of wood shims hold up great over the years, especially when they're sealed right. Honestly, technique matters a ton—I've pulled out windows installed decades ago with wood shims still looking solid because someone took the time to flash and seal properly. Composite shims are handy, sure, but good installation practices make all the difference. Sounds like you've got a solid handle on it already...