shaded ceiling edges

Old 07-29-05, 02:39 PM
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shaded ceiling edges

I am painting a new large house which was finished being plastered about 12weeks ago and I am using white matt on the celings. I thinned the 1st coat and slightly thinned the next 2coats. My problem is the edges are a different shade from the rest of the ceilings. I have put extra coats around edges but they still look as though they haven't fully dried. Also I painted a patch of thinned white and non thinned white onto middle of ceiling and done same along 2 edges. The patches in middle of ceiling dried perfectly but the edges still are different shade, all of the ceilings now have had between 4 and 6 coats each. Will these wet looking edges through time blend in with rest of ceiling or do they need re-coated. I am using a good brand of paint. Thanks.

Last edited by arrow; 07-29-05 at 02:40 PM. Reason: grammar
Old 07-30-05, 08:38 AM
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Are you sure your "new" house has been "plastered"? This sounds more like an issue with drywall taped corners or the like.I could be wrong here as I'm no plaster expert and plaster does involve curing.At any rate you make no mention of any type of primer.I believe that's your problem if you aren't using any.I'd get some Zinnser either BIN or 123 and give the ceiling a coating of primer than see if you still have what sounds like a bleed through issue.Primer would have eliminated so many coats that you've thinned and all that plus probably eliminated your color issue.
Old 07-31-05, 05:52 AM
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Arrow, are you in the UK? Your teminology makes me think that.

IMO, no paint needs to be thinned for brush/roller work. Why did you thin it?
Old 07-31-05, 10:04 AM
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When I used to work in Fla all walls and ceilings were textured. The ceilings often were popcorn with orange peel on the wall. After the ceilings were textured the walls were cleaned of excess but when the walls were sprayed the wall texture overlapped unto the ceiling and with the right lighting it looked as if there was a different color on the edges of the ceiling where it was coated with wall texture. I don't know if any off this applies to your situation but subtle texture differences can make a finish appear a different color.
Old 07-31-05, 04:00 PM
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shaded edges

Thanks guys, yeh i'm in the uk. The reason I thin my 1st coat of emulsion on newly plastered walls/ceilings is that it soaks well in and acts like a sealer. I was always told putting on a thick coat on newly plastered walls meant the paint didn't soak in as well and would come off with the slightest scrape or knock etc. The lighting isn't the cause and a few of the ceiling edges are not as noticable as they were although some still are. Do you always use a primer on new walls etc. To the best of my knowledge we don't usually do that in the uk, but I could be wrong. Thanks to all of you.

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