I hear you on those miters opening up—my old place had original trim from the 40s, and every winter I’d see daylight through the corners. Drove me nuts. I did try biscuits once, thinking it’d lock things together better. Honestly, it helped a bit with alignment, but didn’t totally eliminate the seasonal gaps. Still got a little movement, just maybe not as dramatic. Pocket screws are solid for cabinets, but in trim, they can be tricky to hide unless you’re painting everything.
If you’re already patching nail holes each spring, a little extra caulk isn’t the end of the world. I’ve found a flexible paintable caulk buys you a season or two before things start looking rough again. Not perfect, but it’s a decent compromise if you want that clean mitered look. Butt joints are sturdy but yeah, not the prettiest.
Honestly, if you’re after low maintenance, I’d lean toward miters with reinforcement plus a good caulk. It’s not bulletproof, but in my experience, it’s less hassle than redoing corners every few years.
I’ve found a flexible paintable caulk buys you a season or two before things start looking rough again. Not perfect, but it’s a decent compromise if you want that clean mitered look.
Yeah, that’s been my experience too. I used to obsess over getting those miters perfect, but no matter how tight they started, come winter the gaps would show up anyway. Tried biscuits, splines, even glue blocks—helped a bit but didn’t solve it. Butt joints just look clunky to me unless it’s a rustic place. These days I just reinforce the miters and keep a tube of caulk handy. It’s not flawless, but honestly, nobody notices except me.
- Miter joints look sharp, but man, they’re high maintenance in old houses. Wood moves, gaps show up, and then you’re back at it with the caulk gun every spring.
- Butt joints are sturdier, but yeah… they scream “grandpa’s cabin” unless that’s the vibe.
- I’ve tried pocket screws behind miters for a bit more hold—helps some, but not magic.
- At this point, I just accept a little movement. If anyone’s staring at my window corners that closely, they’ve got bigger problems than my trim work.
If anyone’s staring at my window corners that closely, they’ve got bigger problems than my trim work.
Haha, couldn’t agree more. I’ll admit, I still like the look of a clean miter, but in these old houses, movement is just gonna happen. Sometimes I’ll run a biscuit or two in the corner for a bit more strength, but honestly, it’s mostly about keeping my caulk handy. Butt joints are easier to keep tight, but yeah, they do give off that “workshop chic” vibe. It’s all tradeoffs.
That’s a fair point about movement in old houses—around here, nothing stays square for long. I’ve always admired a crisp miter, too, but after a few seasons of expansion and contraction, those corners start to separate or crack, no matter how much care I take. I’ve tried biscuits and even pocket screws, but honestly, sometimes I wonder if all the fuss is worth it, especially when caulk does such a good job hiding sins.
What I keep coming back to is how much air leakage happens around the trim, especially in drafty places. I started paying more attention to the energy side of things after getting hit with a couple of brutal heating bills. I noticed that even the best-looking joints didn’t always seal well, and sometimes the butt joints, with a good bead of caulk, actually felt tighter. Not as elegant, maybe, but better for keeping the wind out.
There’s also the question of materials—MDF, finger-jointed pine, or solid wood. I’ve had MDF miters open up the fastest, while solid wood seems to hold a joint better but costs more. And paint grade vs. stain grade trim makes a difference, too. If I’m painting, I don’t mind filling and caulking a bit, but with stain, every little gap shows.
Curious if anyone’s noticed a difference in how well their joints hold up to drafts over time. Or maybe it’s just my old house letting everything in, no matter what I do...
I hear you on the old houses and shifting corners—mine’s a 1920s place, and I’ve yet to see a miter that doesn’t open up after a couple winters. Honestly, butt joints with a fat bead of caulk have held up tighter for me, especially in spots where drafts sneak in. Miters look great out of the gate, but if you’re really chasing energy efficiency, I’d take a less pretty joint that actually seals. MDF is a non-starter for me near windows—swells and cracks way too fast. I’ll pay extra for solid wood, but even then, it’s all about the caulk...