Stains Bleeding Through Wallpaper and Primer / Stain Blocker – Continuation to March 9 Post

Re my post from two days ago … I do think my fears were correct, and the mottled look was not part of the pattern , but was from discoloration from some substance in or under the wallpaper . Even after applying the BIN stain blocker , and my wallpaper primer Roman Pro 977 Ultra Prime , today I found a couple of specks like this, which had worked their way through . Some of them I spot-primed with KILZ , and some I just took a razor blade and cut out of the wall. If not treated or removed , stains like this can work their way through the surface of both paint and wallpaper . The paper I’m hanging today is black with a busy pattern, so you’ll never notice a 1/8″ speck of brown . But I still like to give my clients a pristine job . So was happy to apply the additional coat of stain blocker .

Different Runs – Different Materials

Due to a mix-up in terminology, the homeowner originally received just four single rolls (two double roll bolts ) of wallpaper .  They needed eight total single rolls (four doubles ), so two more double roll bolts were ordered.  Being unable to get the same run number , we anticipated a slight difference in shade .  But didn’t expect that the two new bolts would be thinner than the two original bolts . 

What the heck is up?! 

The selection book says this is a non-woven product, and a paste the wall installation method .  Yet the label on both the original and the new rolls says to paste the paper.  Even more puzzling, the instruction sheet included inside the rolls says that it’s  non-woven material , and to paste the wall. 
It’s important for the installer to know what material he’s working with, so I needed to know if this was PTW or PTP .  Usually, non-woven paste the wall are thick and hard to tear , due to their 20% polyester content .  The fat roll felt and acted like a non-woven .  But the thinner roll was thin and crispy and easy to tear.  I sure thought it was a paper material , which would require a different installation technique .  In recent months, I’ve had this same manufacturer send several rolls of the a particular pattern , but some were non-woven, and some were paper.  So I thought we might be experiencing this again.  It’s important to know what you’re working with, because different materials require different installation techniques.  If a DIY ‘er follows the instructions to paste the wall , but it’s actually a paste the paper material, he’s going to encounter a whole lotta mess – and ruined paper . 

Here I used my 24” wide straightedge to tear off a strip of wallpaper from the roll of thin material.  This answered my question.  See the little fibers ?  Those are indicative of non-woven papers, and their polyester content .  Once I saw this, I was certain that it was, indeed, a non-woven material / paste the wall . 

So this material was easier to hang than traditional papers, because no need to paste , book , and let sit for a few minutes.  There are other pluses, too, to NW papers, and most of us professionals like hanging them.  But I wasn’t 100% pleased with the thin version of this non-woven material.  For one thing, its stiff, crispness made it difficult to manipulate, and prone to crease . Also, notice the splotchiness of the paper.  This showed up on the dry paper, right off the roll.

But paper that has been pasted and hung on the wall showed even more splotches .  This is scary, because there is a issue called blushing or staining , where the paper looks like it’s wet , but never dries out.  Do a Search here to learn more.   This happens mostly with non-woven papers , and is tied to certain types of paste .  Which is why I don’t use those pastes!  So curious as to what is causing this slight discoloration.

I believe the spots were just due to moisture .  As I worked my way across the wall and time went on, the paper I had hung first had a chance to air out and dry.  The blotches disappeared . 
 
I’m curious as to why the difference in material.  Maybe the manufacturer was using different factories?  In different countries? Or supply chain issues / material shortages meant that their usual substrate and inks were not available .  Or just trying to cut costs?  Saving money isn’t a bad thing.  But it is, if it cuts down on the product’s quality. 

Slight Problems With Katie Kime Wallpaper

There were eight double roll bolts of this wallpaper , to cover a large powder room in Houston.
Four were rolled so the pattern came off the top of the roll, and four were rolled the opposite way, with the bottom coming off first. This Katie Kime brand is custom-printed , so you can assume that all these rolls are from the same run , or batch . But maybe not - why are some forward and some backward ? Possibly the company substituted some returned goods, or some old stock they had sitting around the warehouse, for half of this order.
I didn't want to risk putting strips of slightly different shades on the same wall. So I had to carefully plot the room so I used the "forward" rolls on some walls, and the "backward" rolls on the others. This does eat up additional paper , so good thing I always have the homeowner purchase a little extra.
Also note the crease in the roll on the right. There were a few other creases in other rolls.

I have no idea what happened to the font in the section above, nor do I know how to get it back to the original. All I know is that I HATE this “New Editor” that WordPress foisted on us a few years ago. Perfectly HORRIBLE. And their Customer Service doesn’t care. Anyway … moving on …

Note the horizontal smudge next to the top of the capitol. Since this Austin Toile pattern has a 25″ pattern repeat, discarding this piece ate up minimum of 2′ of material (x 24″ width = 4 square feet) and potentially more, to get the correct pattern match.

Usually this brand prints on a nice non-woven / paste the wall substrate. But, like other manufacturers, Katie Kime has had supply issues obtaining raw materials . During the height of the Pandemic , they resorted to printing on some positively awful stuff. Extremely heavy , thick , un- pliable , stretched to the extent that the pattern wouldn’t match properly, and more. One was completely un-hangable and had to be sent back. I can’t find all my posts re those challenges, but here is one:
https://wallpaperlady.wordpress.com/2021/07/21/katie-kime-tough-install-today-draft-messed-up-delete/
But they’ve since gone back to printing on their usual stock, and I’ve not had problems lately. So when I first picked up this box of 8 double roll bolts, I was surprised at the weight of it. Also the paper had a shiny surface and was obviously composed of vinyl . I couldn’t tell if the substrate was non-woven or paper . I feared they had gone back to printing on that bad material , or perhaps were using up what they had in the back of the warehouse .
There were no instructions included, nor any information at all – not even a brand name! Although I could find instructions on-line, you can’t be sure these are current and applicable to the rolls in the box. KK has amazingly good customer service , and you can usually get intelligent answers via phone or on-line chat … but my call to them went to voice mail , and then we got disconnected, so I gave up.
After hanging the first few strips, I figured out that this was a flexible vinyl on a non-woven substrate, so that part was good. However, the thickness of the material interfered with getting good, tight, flat seams , as you can see somewhat in the photo. The seams aren’t horrible, but a better non-woven without the vinyl usually produces almost invisible seams.
The surface was shinier than usual. Shiny tends to show every imperfection in the wall underneath. Here the thickness was a bit of a help, as it helped cushion any slight dips or pimples on the wall.
There was also an odd orange discoloration about 1.5″ long on the edge of one strip. Very faint, but I could see it, and sometimes these things end up catching your eye. I also worry that it might be some substance that will bleed into the paper and cause a larger stain over time. Of course, this popped up after I had hung a very difficult piece in a tight spot, and then hung the subsequent strip. In other words – no way was I taking it off the wall and re-doing. I cut out a design motif and pasted it over the area.
Another thing I was unhappy with has happened a number of times with KK paper. The pattern will match perfectly at the top of the wall, but begin to slide up or down, creating a mis-match , as you move down the wall. I think that a lot of it has to do with the vinyl material, because it’s stretchy. The weight of the paste and the vinyl will cause the bottom section of the strip to sag. This simply doesn’t make sense, though, because, if the paper is going to absorb moisture from the paste and expand (which many papers do), each strip should do so at the same rate, right? But not.
I finally deduced, correctly or not, that the pattern gets distorted as it’s wound into a roll. So my theory is that if you take your 10′ strips from the same position in each roll, the pattern should match. In other words, take a 10′ strip from the top of roll #1. Take your next strip from a brand new roll #2. Third strip from roll #3. Obviously, this leaves a whole lot of unused paper. For shorter areas like over doors, where it’s harder to see, and where you can fudge the pattern a bit, I used the paper from the insides of the rolls, again, roll #1 next to roll #2, etc. But this doesn’t work on every instance, so you’re gonna be stuck with many areas where the pattern doesn’t match perfectly across the seams. The solution is to match the pattern at eye-level , and then allow it to go off as it moves toward the ceiling and floor.
There were other issues with this paper that were disappointing to me. But not overwhelmingly awful. Most homeowners would not notice. But I sure hope that this was a one-time issue, and Katie Kime will go back to its former good-quality, non-woven material.

Wallpaper Severely Discolored by Smoke

Digital Image

Digital Image

See the whitish area along the very top of the walls in the first photo? That was caused by the painters putting blue tape on the wallpaper and then yanking it off – and it’s not the topic we’re discussing today (but you can do a Search here on those terms to learn more).

What we’re looking at is the dark discoloration on the upper areas of the walls above the kitchen cabinets, all around the room.

This is a rental property, and the homeowners aren’t sure what happened, but they were told that at some point “the house was filled with smoke.”

Well, that smoke was enough to penetrate the wallpaper and permanently discolor it.

In the second picture, I have stripped the striped paper off the wall on the right side of the photo.

Above the door, the guy who hung the striped paper overlapped about 4″ of paper on top of the striped paper over the door. When I removed the overlapped section, it revealed some paper that had not been exposed to the smoke.

What a difference in color!

What’s especially intriguing is that, in the kitchen, the wallpaper was a paper, with no coating and which the smoke could penetrate easily. But in the second photo – the shot over a door in another room – this is a solid vinyl paper, which you think would be impenetrable to just about everything.

Yet the smoke got through – but it did not go far enough to damage the vinyl wallpaper underneath.

A very interesting study in science!

This Worries Me – Mildew??

These little specs of brownish red, and also circular patterns of a powdery grey/black substance, were dispersed throughout the backing of the Serena & Lily grasscloth I hung today.

What worries me is that they look like mildew that I have encountered in homes that have moisture problems. And mold and mildew can work their way through wallpaper, causing discoloration, and even interfering with adhesion.

Possibly the factory is not climate-controlled, and mildew was able to get a foothold on some of their product??

Let’s hope that my worries are unfounded. Only time will tell.