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Old 06-02-2012, 06:00 PM   #1
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Default Patchy ceiling flat

I used a one coat ceiling flat on a sizable lounge ceiling and in areas where the window projected light across the surface it showed up the patches, so like an idiot I thought a second coat would fix it but it made it worse.
Is there any way to fix it?
Also I used a wooster big ben standard nap roller, should I have used any particular roller cover?
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Old 06-02-2012, 07:16 PM   #2
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The marketing term "one coat...." any kind of paint always makes me .
Today I bid an interior, which included a vaulted master bedroom ceiling currently painted semi-gloss deep red. They want the ceilings flat white - if there's a paint on the planet that can go from shiny dark red to flawless chalky white in one coat I'd love to know about it. Otherwise I call bullschmidt on "one coat" and "paint and primer in one!" hype and avoid using such products.

Anecdote: quite a few years ago, I did a white-over-white large ceiling using the customer's paint (against my better judgement - it was Behr) and the exact same thing happened to me - flashing, visible roller marks, some reflective affect. I assured the HO that I was painting the ceiling as I always did...long story short, I went and got a couple of gallons of ProMar 200 flat extra white, painted a third coat and it looked perfect. Mostly I use lambskin rollers.

Sometimes, it's the paint...is this a product you've used before? Are you using the same roller/method you typically do? Could it be there's an uneven of funky texture on the ceiling that gives the illusion of it being "patchy"?
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Old 06-02-2012, 09:47 PM   #3
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Maybe sealing the patches and then two coats would of done the trick but without pics it is just speculation, could be poorly done drywall that is being exposed by all the natural light but without pics hard to say.
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Old 06-02-2012, 10:15 PM   #4
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Thats a tuffy.The lights reveals a multitude of sins.
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Old 06-02-2012, 11:28 PM   #5
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If its old nap or bad d/w, you may have to do a very tight skim and sand. Try BM K508 Ultraflat paint right over the skim.
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Old 06-03-2012, 12:33 AM   #6
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Do you know how to roll? If you don't have experience rolling ceilings, there is your answer!
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Old 06-03-2012, 01:03 AM   #7
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You probably used one of those gimmicky 1 coat ceiling finish products which is targeted for homeowners doing their own painting. The trouble with this product is, you cannot touch up any misses. This will show up resulting in a patchy finish.
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Old 06-03-2012, 09:43 AM   #8
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let me tell you the set up it was a wooster big ben newish roller cover.
the ceiling had been painted before in flat,

Ordinarily the one coat is fantastic, if you give it one coat, but I foolishly gave it 2.
there were no bumps or anything , what was causing the patches is the solids in the paint not lining up.

Btw it was Dulux premium.
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Old 06-03-2012, 09:44 AM   #9
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Quote:
Originally Posted by PaintingContractorNJ View Post
Do you know how to roll? If you don't have experience rolling ceilings, there is your answer!
Maybe I should go back to basics.
what is your method for doing a great ceiling?
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Old 06-03-2012, 12:03 PM   #10
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It showed the dry wall patches ? Or the ceiling just looked patchy ? If the drywall patches weren't ore primed with a flat first . This could cuz them to flash . Second re do the ceiling
In guards then repaint .
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Old 06-03-2012, 01:33 PM   #11
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Quote:
Originally Posted by mv8710 View Post
Maybe I should go back to basics.
what is your method for doing a great ceiling?
On a 14 x 12 ceiling, I start at one end, rolling a left to right, strait pattern, rolling out half of the ceiling, keeping a wet edge, then I do the other half the same way. I work quick and never go back over the paint after it starts to set up, (that will cause patches).
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Old 06-03-2012, 01:41 PM   #12
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Quote:
Originally Posted by mv8710 View Post

Ordinarily the one coat is fantastic, if you give it one coat, but I foolishly gave it 2.
there were no bumps or anything , what was causing the patches is the solids in the paint not lining up.
What?
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Old 06-03-2012, 01:41 PM   #13
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I've run into this problem before on large ceilings. I tried many different paints and rollers. My best guess is the paint your using has at least a slight sheen and this is causing the issue.

I use Sherwin Williams cover max and a Purdy colossus 3/4 in cover. Cover Max is cheep crappy paint but it's dead flat and touches up great. The 3/4 cover does give the ceiling a little texture but the ceiling height and the fact that it dries so flat should take care of the issue.

Just be sure to strain the Cover Max before you use it. It's ALWAYS chunky out of the bucket.
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Old 06-03-2012, 01:42 PM   #14
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Pictures would help figure things out better.

I think Sean mentioned the issue could be with the patches you did.

If they aren't sealed right, they will show up.

The original condition of the ceiling will dictate what is needed to make it look great.
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Old 06-03-2012, 03:21 PM   #15
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Quote:
Originally Posted by mudbone View Post
Thats a tuffy.The lights reveals a multitude of sins.
Agreed.

Also not an easy fix with all the variables that could have went wrong.
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Old 06-03-2012, 08:51 PM   #16
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[QUOTE=Wood511;318154]What?[/Q
the patches are caused by the high solids in the paint and rolling it causes a textured finish. and the texture is random.
and if you get light on it, it sticks out.
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Old 06-03-2012, 09:17 PM   #17
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I've never known a second coat, applied over a fully dried first, to make matters worse. Maybe it's just the paint I use.
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Old 06-03-2012, 11:02 PM   #18
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I always use sherwin-williams CHB on ceilings. it's a true flat and touches up great. I've had no problems with it on large, well-lit ceilings. Plus, it's not chunky out of the can.
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Old 06-03-2012, 11:19 PM   #19
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Keep in mind guys the OP is across the pond in NZ, so products and methods may be a bit different.
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Old 06-03-2012, 11:21 PM   #20
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Quote:
Originally Posted by Workaholic View Post
Keep in mind guys the OP is across the pond in NZ, so products and methods may be a bit different.
I thought about that Sean, but still...
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