First thing I do is measure twice (because I’ve messed up more than once), then cut the molding with a miter saw at 45 degrees for corners. I use a stud finder to nail it in, caulk the gaps, and paint after. Anyone got tricks for dealing with wavy walls? Mine never seem perfectly straight…
Wavy walls are a pain, no doubt. I do pretty much what you described, but I’ve found a couple extra steps help hide those gaps and weird angles. After measuring and cutting, I dry-fit each piece of trim before nailing anything down—sometimes I’ll even scribe the back edge with a utility knife or block plane if the wall bows out. It’s a bit tedious, but it lets the molding sit flush instead of rocking.
For bigger gaps, especially at the top or bottom, I use painter’s caulk like you mentioned but push it in deep with a wet finger. If the gap’s really wide (like more than 1/4”), sometimes I’ll back it with a thin bead of foam first so the caulk doesn’t just sink in.
One thing that’s saved me: pre-painting the trim before install. That way, touch-ups are easier and you don’t have to worry about getting paint on the wall if you need to fill a big gap later. Not sure if that’s overkill, but it’s helped me keep things looking sharp even when the walls aren’t playing nice.
Pre-painting trim is such a game changer, isn’t it? I used to do all my painting after install, and it always turned into this awkward dance with painter’s tape and touch-ups. Now I just lay everything out on sawhorses, slap on a couple coats, and it’s so much less stressful later. Plus, you can really get those edges covered.
I’ve also had to deal with some seriously wavy plaster in old houses—sometimes I’ll use a flexible backer rod for those monster gaps instead of foam, especially if the wall’s super uneven. It fills the space but doesn’t suck up all the caulk, and it’s easy to trim down if you need less thickness.
One trick I picked up from an old carpenter: if the wall’s really wild, sometimes you can cheat a little by using a slightly thicker bead of caulk and feathering it out wider. It’s not “textbook,” but it blends in once you paint. Honestly, half the battle is just convincing your eye that everything’s straight... even when it’s not.
Pre-painting trim really does save a ton of hassle, but I always wonder about the environmental impact of all those disposable sawhorse covers and drop cloths. I’ve started using old sheets and reusable tarps—less waste, and they work just as well. The backer rod trick is gold for those weird old walls, though I sometimes feel like I’m just sculpting with caulk at that point. Funny how “good enough” is often just what your eye believes after a fresh coat of paint...
MAKING TRIM LOOK PRO WITHOUT HIRING OUT
Old sheets are a solid idea—I’ve been using those cheap plastic drop cloths, but they rip and honestly, they’re a pain to reuse. Never thought about the waste much, but yeah, it adds up. Might raid the linen closet next time.
The “sculpting with caulk” thing is way too real. I swear, I spend more time fussing with caulk than actually nailing up the trim. Sometimes it feels like I’m just filling in the sins of the house, hoping paint will hide everything. Have you ever had caulk shrink weirdly after it dries? I keep getting these tiny hairline gaps showing up a week later and it drives me nuts.
I haven’t tried backer rod yet, just lots of extra caulk and finger smoothing. Is it really that much better for big gaps? My walls are so wavy in places it almost feels like cheating to fill it all in, but I guess as long as it looks good in the end…
