Spray Knockdown Problem.

Drivetech

I have a problem on a big vaulted ceiling that we sprayed and knocked down. White primer behind it 2 coats, everything looked great until the walls got painted a week later. Dark color on the walls and the front windows let in a lot of light. I can now see every butt joint on the whole Vault. Not in the rooms where there is just the standard flat ceiling but the Vault looks really bad. What would anyone suggest to solve this problem? Paint it with flat colored primer? 25 years never seen this before spraying ceilings.

Sir Mixalot

Sounds like the finishing, Not the texturing. Did you do the finishing or did someone else?

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Brocktologist

Did a "rookie" oversand and rough up the paper?
Have you put a wide knife up to the seams to see if its hallow or humped?
I know it makes us sick to see that!!! Maybe/hopefully the primer and paint have not fully cured and it is just photographing. Speaking of primer and paint, has anything changed?

Frankawitz

Sounds like what just happened to me. I did some work for this GC and he had his guy hang sheetrock in a bath ceiling, I asked the GC if he wanted me to float the whole ceiling, he said no just tape and mud, so I hit it two times, finished off using a 10" knife, primed it came back next day looked like crap ended up hitting it again with my 14" that 8 extra inches sure makes a difference when you look up and see a nice smooth ceiling instead of a mole trail. sounds to me you might need to run some more mud with a 14" knife take those humps out. thing that sucks is the texture. good luck

www.frankawitz.net

Drivetech

I did 4 coats with a 14 inch knife total width is about 30 inches on the butts. took a knife and put up to it and they are not too bad same as \i usually have on ceilings and not notice much of a problem. Would painting the texture help the flashing.. The butts almost look like a different color. They were fine for the first week or so until the walls were painted then it is noticable. We all looked at the ceiling when we were done and a week afterwards. I guess once the walls were painted you can really see every butt joint. I can see on that big of ceiling you may be able to see a couple but not every one of them. I spent extra time on the butts some have 5 coats on them. Made sure they were good before we sprayed. Now they look like crap.... 2 coats of white high hide primer on the ceiling never seen any problems as we were knocking it down. Looked awesome and only noticed one of my butt joints as knocking down. Customer was happy with it and then now it has changed. Not sure what the change was only that the walls have color now. And when we do the ceiling we never sand the mud is flat enough where in 25 years we have not had to sand.

Drivetech

Ok today I went to look at the ceiling for the first time since i did the knockdown. I see what the problem is. The walls were painted a darker color and it is showing the yellow much more clearly on the ceiling. The mud is yellow compared to the white primer behind it. Now I am wondering if I painted the ceiling a lighter tan than the walls overtop the knockdown if It would cover the imperfections.

WarnerConstInc.

Sounds like a crappy placement of a window. Are the ceilings flat paint? I have seen wall color effect the overall look of a ceiling before though. Sounds like someone ran the knock down trowel over the butts the wrong direction and now the butts have less texture on them???

Tim0282

I'm thinking the ceiling needs painted. You just primed BEFORE you textured and nothing after? Wouldn't you need to paint? Primer isn't designed for finish coat under the texture. I hope that takes care of the problem. I feel your pain...

bwalley

Prime and paint the ceilings.

WarnerConstInc.

Now that I re-read it, yeah it needs primed and painted. Really.

Sir Mixalot

Ding Ding Ding Ding!!! Maybe even use a stain blocking primer just to cover your arse.

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Brocktologist

Sometimes you just have to laugh...

Tim0282

Yep!!

Darren@Partners

Primed prior to texture? Keep hearing about this. Makes the KD smear unless you wait til lunch to wipe down. And without paint over texture what protection does your texture have. Will "gray" and collect dirt at different rate than other painted surfaces. Also dark paint on walls (& lemme guess, high gloss) collect much more light than lighter colors. Paint entire ceiling back to flat white, PPG Builder Spec Pro. Grab your arse cause then the walls' defect will REALLY show if high gloss. As general rule defects cannot be hidden with more gloss paint coats, it just magnifies unless you go FLAT, fix defects, then paint away with dark or glossy paints. BTW does anyone notice more of these issues and think it might relate to the crappy paper used on rock today?

Brocktologist

YES!!!

oldrivers

why would the buttjoints show yellow and not the flats and angles too. if it were a primer paint problem it wouldnt show only the butts. Im betting its bad finsh work on the butts. yep didnt trowel them out far enough the tools are great for speed but they arent 100% always right. you need to read the buttjoints when finishing them and the boxes dont do that by themselves.

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weeddrywall

4 and 5 coats with a 14? i hate to say it, but it sounds like your butts are built up too high. probably would not normally show, but then ad just the right slope on lid...with just the right amount of light from windows and BOOM every butt shows. i have seen overworked butts on large vaults several times. always looked worse with unusual lighting. yes.. you should paint your ceilings flat, but when the sun hits it just right i think it will still show. If all the painting fixes fail, you might have to skim the text a couple times and respray..that really! sucks! i hate when stuff like this happens, but it does happen! Even after 25 yrs in the trade. Hope you find your fix . Please post outcome. good luck

Brocktologist

Correct again!

Brocktologist

I've never heard of needing to coat a butt joints 4 and 5 times. I think you may be right on this one.
Oh yea, Welcome to the madness.

MeatBallDryWall

A-Men

A_MEN!! I also love it when it's slick walls/ceilings & they dont 1- dust off the rock. 2 dont backroll, spray EVERYTHING, period. I just hung/finished a 285Brd house, 9ft ALL slick & this idiot (homeowner)sprayed it all. No dusting, no backroll, & he didnt use any ****ing primer. Yes he put str8 semi-gloss onto the Ceilings & the walls after I told him not to. All I can say is WOW. I could count every nail,joint,corner,etc in the house. He said it looks good! I said, yes it does, pay me & he did. Back to the point, it actually takes some skill & paint to have a good looking drywall job & it starts with the damn hanging & ends with the painter. GOOD LUCK!