Mysterious Stripes On Drywall

by Puzzled
(New York)

I built a new home a few years ago. A year later stripes began to appear on all the walls painted by the builder, but on none of the walls I painted. Also, there are no lines on the ceilings painted with sand paint, and no lines on any white walls painted with conventional eggshell EcoSpec. Walls I painted myself I primed first, then painted with two coats of BM EcoSpec. Walls the builder painted were not primed before they applied two coats of BM EcoSpec. Builder asserts they did not thin the paint. Walls were painted within days of hanging the rock during a snowy week in November. The mystery involves the "S" shaped line in the photo which appears to follow the adhesive, not the studs. The "S" covers three studs nailed together at a joint. Adhesive used by builder is Henkel's OSI Formula 38. Benjamin Moore denies EcoSpec has insufficient hold back capability as long as used as directed, which calls for primer. Finally, we do not burn candles, the rooms are all vented and kept clean and dry, we use radiant heat, we do not have a wood stove, walls are free of dust and have been wipe tested (magic eraser did not erase lines), all ruling out ghosting. The question is, what caused these lines to appear?

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Sep 14, 2016
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awesome ideas NEW
by: Allan

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Jan 22, 2016
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by: Anonymous

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Sep 23, 2015
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Drywall NEW
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Aug 12, 2015
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Oct 11, 2011
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Thanks, DrywallTeam
by: Anonymous

Yours is an intriguing theory. I've asked everyone from chemical analysts to corporate HQs of BM and Henkel, and I've not heard a tape theory. One hypothesis is the walls were painted before the adhesive cured, and the adhesive encapsulated the pigment. Another theory is the paint may in fact have been thinned, and, in conjunction with the above, what paint was not encapsulated is fading prematurely. I should have added that the color of the lines represents the true color of the wall when it was painted, and matches in density and hue the dark rectangles behind hanging artwork in those rooms. Hm - tape - interesting. I wonder if the "S" line is too fluid, with rounded corners, for it to be tape, but I'll look again. At any rate, thank you for your insight.

Oct 11, 2011
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Drywall lines
by: DrywallTeam

Hello,
This is a very interesting scenario. With out knowing the entire process and how it was actually constructed it is hard to give an exact answer. In appearance the first thing that appears to me is that it is the tape that is showing through the paint. If this is the case I would assume that they used tape to cover the nail holes instead of simple compound.
When they painted over the top of the tape, since they did not use a primer, it soaked into the paper tape which would cause the tape lines to appear. Hence why they are all similar in dimension and over the studs. The S curve I would attribute to the same factor. Say that there is a triple stud in place. One of the studs could have protruded out a bit past the plane of the rest of the drywall causing a bow. When this was secured down it could of fairly easily cracked the drywall. Which could have been in return taped and the same process followed.
This is a reason I use fiberglass tape, and a nice skim coat and primer as mentioned on the site. Beyond this I can not offer more information without examining it. I can not see any other reason that this could occur. I hope this helps.
Tyler

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