Getting smooth drywall joints without losing your mind

Funny thing, sometimes the “hidden” spots end up being the ones people show off during a tour... go figure.

- Been there. Spent hours getting the living room joints perfect, and then my neighbor was all, “Wow, look at this closet!” - and ran her hand right over the one spot I’d let slide. Figures.
- For me, it’s all about picking battles. If I know a spot’s going to be behind clothes or boxes, I’ll sand just enough so nothing snags. No sense burning through extra sandpaper (or patience) for a spot no one’s likely to notice.
- Where the sunlight hits, though? That’s where I slow down and do an extra pass. Light’s unforgiving, especially late afternoon when it slants across the wall and suddenly every little ridge is front and center.
- I keep a cheap work light handy to check for shadows as I go. Not fancy, but it saves me from surprises later.
- If you’re on a budget like me, sometimes “good enough” really is good enough. I’d rather put the time and money into paint or trim than obsess over every closet seam. As long as nothing’s rough to the touch and hangers don’t catch, I call it a win.
- One trick: use your hand, not just your eyes. Sometimes you can feel a bump you can’t see, especially in weird lighting. Quick swipe with a sanding sponge and you’re golden.

Bottom line, nobody’s house is perfect, even if it looks that way on Instagram. Most people won’t notice the small stuff - unless, apparently, they’re giving a tour and want to show off their “hidden” storage. That’s when the universe laughs at us all...

If I know a spot’s going to be behind clothes or boxes, I’ll sand just enough so nothing snags. No sense burning through extra sandpaper (or patience) for a spot no one’s likely to notice.

Funny how that logic works until, like you said, someone opens the closet and suddenly it’s the feature of the tour. I’ve had buyers zero in on a utility room seam that I barely touched up, while the main living area (where I spent hours feathering out joints) gets a quick glance. Makes me wonder if there’s some sixth sense for finding the least polished spot.

I’ve found myself obsessing over whether to go full perfectionist or just hit “good enough” and move on. Especially when you’re juggling multiple units or flips - time is money, but so are first impressions. Ever notice how certain buyers will run their hands along every surface? Drives me nuts. I started using raking light after getting burned by afternoon sun highlighting seams I thought were invisible. Cheap clamp light, low angle - suddenly you see everything you missed. Annoying, but it saves headaches later.

I do disagree a bit about closets always being safe to skimp on, though. Had an inspector call out rough drywall in a pantry once - said it could snag food packaging or clothing. Never would’ve guessed that’d be an issue, but now I at least make sure those spots are smooth to the touch.

Curious if anyone else has had luck with those sanding poles with built-in lights? Worth it, or just another gadget collecting dust? I keep thinking there must be a sweet spot between “museum-quality finish” and “nobody will ever notice,” but it feels like the goalposts move depending on who’s walking through.

At the end of the day, I agree with you: nobody’s house is perfect, and most people don’t notice half of what we stress over... unless they do. Then it’s all they can talk about.

I swear, the moment you think “nobody will ever see this,” it’s like a homing beacon for picky buyers or inspectors. I’ve had folks ignore my perfectly smooth accent wall and then run their hands along the inside of a linen closet like they’re grading drywall for the Olympics. As for those sanding poles with lights - tried one, and honestly, it felt more like a lightsaber than a tool. Cool in theory, but I kept going back to my trusty clamp light and a little elbow grease. Anyone else find that the more you stress about perfection, the more likely someone is to spot that one tiny flaw? Or is that just Murphy’s Law of home improvement...

It’s wild how people will ignore the stuff you spent hours on and then zero in on the one spot you barely touched. I’ve had someone compliment my reclaimed wood shelves, then immediately point out a tiny nick in the baseboard behind a plant. Perfection’s a moving target, honestly. I just try to keep things functional and eco-friendly - if there’s a little character left behind, I call it “charm.”

Perfection’s a moving target, honestly. I just try to keep things functional and eco-friendly - if there’s a little character left behind, I call it “charm.”

Couldn’t agree more about “charm” - I’ve spent years patching and sanding in my 1920s place, and honestly, there’s always going to be a spot that isn’t magazine-perfect. People love to point out the quirks, but half the time those quirks are what make a house feel lived-in. If you want smooth joints without losing your mind, I swear by using a wider knife for the final coat and just accepting that small imperfections are part of the story. No one’s ever going to notice them as much as you do.

Wider knife for that last pass makes a world of difference, yeah. I’d add - don’t underestimate how much lighting can mess with your perception. What looks like a ridge in the evening disappears in daylight, and vice versa. I’ve chased “perfect” joints only to have shadows make them look worse than they are. At some point, you just gotta call it done and move on. Small dings? That’s just proof someone actually lives there.

Man, you nailed it with the lighting thing. I can’t count how many times I’ve thought I had a joint dead flat, only to have the sun come in at a weird angle and make it look like the Rockies. At a certain point, you’re chasing your own tail for nothing. Most folks never notice the little stuff anyway - unless they’re crawling around with a flashlight and a magnifying glass, which, let’s be honest, nobody’s doing unless they’re your in-laws. I say mud it, sand it, prime it, and move on. That’s what touch-up paint is for.

It’s funny how the “perfect” finish is always one sunbeam away from looking like a mess. I’ve had buyers walk through flips and not notice a thing, even when I could see every imperfection because I knew where to look. Still, I sometimes wonder if there’s a trick to getting joints smooth enough that even in weird light, they don’t stand out too much. Has anyone tried those wider knives or special sanding blocks? I’m all for moving on, but curious if there’s a step that actually saves time down the road.

- I swear, every time I patch a wall in my 1920s place, the sun finds a new angle to highlight my “craftsmanship.”
- Tried those wider knives - felt like wielding a canoe paddle in a closet. Still ended up sanding more than I wanted.
- Wet sanding helped a bit with dust, but then there’s the streaks...
- Anyone else notice old plaster walls are way less forgiving than drywall? Or am I just cursed by my house’s ghosts?
- Has anyone found a primer that actually hides those little shadow lines, or is that just wishful thinking?

Title: Getting smooth drywall joints without losing your mind

You know, I hear a lot about primers hiding imperfections, but I wouldn’t put too much faith in any of them to truly erase shadow lines on old plaster. Even the best high-build stuff can only do so much if the surface isn’t pretty close to perfect before you roll it on. Sometimes, I think primer gets more credit than it deserves - like it’s a magic eraser or something. It’ll help with minor differences in porosity and sheen, but those little ridges and valleys still show up once the light hits at the right angle.

I’ll admit, old plaster’s a different beast compared to drywall. I’ve worked on a handful of properties from that era, and every time, the walls seem to have their own personality. I actually prefer joint compound over setting-type mud for patching because it sands easier and gives me more working time, but yeah, there’s usually more sanding involved. Wet sanding is great for controlling dust, but like you noticed, it’s easy to leave streaks or get uneven spots if you’re not careful.

About those wide knives - I used to think bigger was always better too, but honestly, in tight spaces or on wavy old walls, a smaller knife sometimes gives you more control. You can feather out the edges without fighting the tool so much. It’s slower, but I’ve found I end up doing less rework.

One trick that’s helped me: after your final sand, hold a work light almost flush against the wall and move it around. It’ll reveal any trouble spots before primer goes on - saves a lot of frustration down the line when the sun decides to show off your patch job. And for what it’s worth, even pro crews don’t get it 100% invisible on old plaster. Sometimes, “good enough” really is good enough, especially if you’re not planning to sell tomorrow.

Anyway, don’t beat yourself up too much. Those ghosts you mentioned? Probably just jealous they didn’t have access to modern joint compound.

Sometimes, I think primer gets more credit than it deserves - like it’s a magic eraser or something.

Couldn’t agree more here. Primer’s great for evening out porosity, but if you’ve got an obvious ridge or a dip, it’s just going to highlight it once the light comes in at the wrong angle. I’ve found even the “high-build” eco primers don’t do much for actual texture issues - they’re more about prepping for paint than hiding sins.

One thing I’d add: if you’re trying to minimize sanding (and dust), using a damp sponge after the mud sets up just enough can help knock down ridges before they harden. It’s not foolproof, but I’ve had fewer dust clouds and less cleanup. Also, if you’re concerned about indoor air quality, steer clear of setting-type compounds that have silica dust - nasty stuff to breathe.

I get the appeal of wide knives, but yeah, sometimes a 6" or even a 4" knife is just better for old, wavy walls. Control over speed any day. And that trick with the raking light? Total game changer. If you haven’t tried it with an LED work light, you’re missing out - it’ll show every last imperfection before you commit to paint.

Totally with you on the raking light - nothing like thinking you’ve nailed it, then that LED shows every little bump you missed. I’ll admit, I still get tempted by those “miracle” primers, but yeah, they’re not hiding anything major. I’ve had better luck just taking my time with the mud and using a smaller knife for those weird old walls. Sometimes I feel like I spend more time fussing with sponges and lights than actually sanding, but hey, less dust in the lungs is worth it.

I’ve had better luck just taking my time with the mud and using a smaller knife for those weird old walls. Sometimes I feel like I spend more time fussing with sponges and lights than actually sa...

I get the appeal of less dust, but I’ve actually found that sometimes all the fussing with sponges makes it harder to spot imperfections until paint goes on. There’s something about a light hand with a sanding pole - especially after a good raking light check - that seems to give a more predictable result for me. I know it’s not great for the lungs, but with a decent mask and some ventilation, it feels more controlled than wet sanding. Maybe it’s just old habits, but I trust what I can see in the dry phase more than what I feel with a sponge.

Dry sanding just feels more honest, if that makes sense. I’ve tried the sponge thing and ended up chasing little bumps I couldn’t even see until after primer - like drywall hide-and-seek. At least with a sanding pole and some good side lighting, you know what you’re dealing with. Yeah, the dust is brutal, but I’ll take a dusty floor over surprise craters any day.

I do keep telling myself I’ll invest in one of those fancy vacuum sanders... then I remember I’d rather spend the money on pizza after the job’s done. Old habits die hard, I guess.

Dry sanding definitely feels more straightforward, even if it’s a pain to clean up after. I totally get what you mean about the “honest” part - at least you can see what you’re working with, and there’s no weird surprises once the primer goes on. I tried the wet sponge thing too, thinking it’d be less mess, but honestly, it just made me second-guess every little bump. Ended up going back over everything with sandpaper anyway.

If it helps, I found that using a cheap work light at a low angle really highlights those sneaky imperfections before you even get to priming. It’s not as fancy as a vacuum sander, but it’s saved me from a few “how did I miss that?” moments. And yeah, pizza after a long day of sanding is way more satisfying than any new tool... at least for now.

That trick with the angled light is a total game changer - funny how you start seeing every little flaw once you do it, though. Do you ever find the dust from dry sanding just gets everywhere no matter what? I’ve tried taping off doorways and using a box fan in the window, but somehow there’s still a fine layer on everything. Ever experimented with those sanding sponges with built-in dust catchers? I’m curious if they’re actually worth it or just another gimmick.

Do you ever find the dust from dry sanding just gets everywhere no matter what?

Man, every single time. I swear drywall dust has a mind of its own - it finds every nook and cranny. I’ve tried those sanding sponges with the dust catchers, but honestly, they only help a little. They’re better than nothing, but you’ll still be wiping down surfaces after. Wet sanding cuts down on dust a ton, but it’s not always practical if you need to feather out big joints. Just part of the fun, I guess...

Yeah, dust control is a nightmare. I’ve tried taping off doorways and running a shop vac right next to the sander, but it still manages to sneak into the next room somehow. Wet sanding is cleaner, but I find it can leave the surface a bit uneven if you’re not careful. Honestly, I just plan for an extra hour of cleanup - seems unavoidable.

Wet sanding is cleaner, but I find it can leave the surface a bit uneven if you’re not careful.

Totally get what you mean about wet sanding. It’s less dusty, but I’ve had my fair share of lumpy patches from not wringing out the sponge enough or going overboard. Here’s what’s worked for me to keep things smoother (and a bit cleaner):

1. Use a vacuum sander with a HEPA filter. The regular shop vacs help, but the HEPA ones seem to catch more of the fine stuff that floats everywhere.
2. For wet sanding, I use a barely damp - not wet - sponge and do super light passes. If you press too hard, you’ll gouge or drag the mud.
3. I do a quick dry sand with a fine grit after the wet pass, just to even things out. It’s a little extra work, but it keeps the mess down and the finish smooth.
4. If you can, set up a box fan in a window blowing out. It creates negative pressure and helps pull the dust outside instead of into the next room.

Honestly, I’ve just accepted that there’s always some cleanup. But these tweaks have saved me a few headaches (and hours scrubbing baseboards).

Honestly, I’ve just accepted that there’s always some cleanup. But these tweaks have saved me a few headaches (and hours scrubbing baseboards).

Couldn’t agree more about the cleanup - no matter what tricks I try, there’s always a fine layer of dust lurking somewhere. I do think your HEPA vac tip is spot on, though. I tried to cheap out with a regular shop vac and, honestly, it just made the air taste like drywall for days. Sometimes spending a little more upfront saves you in sanity and cleaning supplies.

I’m with you on the “barely damp” sponge thing. The first time I wet sanded, I soaked the wall and ended up with streaks and weird dips. Live and learn, right? Now I just keep a spray bottle handy and mist the sponge instead of dunking it.

The box fan trick is gold - especially if you’re working in a small space. It’s not perfect, but it definitely helps keep the rest of the house from looking like a construction zone.

At the end of the day, I figure if the joints are smooth enough that nobody notices after paint, that’s a win. No need to chase perfection and drive yourself nuts (or broke) in the process.