Posts Tagged ‘crackle’

Thin Blue Plastic Tape Keeps Paste Off The Wall

August 7, 2022
Panel of wallpaper lying on my pasting table. The left edge will go up against a painted wall that is not to be wallpapered. It’s important to keep paste off this wall, because the paste can cause the paint to crackle and flake off. Yes, you can wipe paste off the wall, especially if it’s a gloss paint. But better to not get paste on the wall in the first place.
So I’ve placed a strip of this cool blue plastic tape along the edge. It sticks to the pasted wallpaper, but will not let paste get onto the wall.
Here is the wallpaper in place, with the little 1″ overage wrapping onto the wall to the left. See how the blue tape is preventing paste from getting onto the wall?
Once I finish trimming, I will remove both the excess paper and the blue tape. Be sure to remove any blue tape that is still behind the wallpaper.
This also works for ceilings and for abutting another strip of wallpaper.
This tape is much better than painter’s plastic or ” caution tape ” because it is lightly tinted so you can see it, it’s translucent so you can see through it, it has the perfect body – thicker than painter’s plastic but more flexible than caution tape, and has a unique textured surface that makes it handle nicely, plus you can easily snap it apart so there is no need for scissors or razor blades.
It’s made in Japan and tricky to get. If you’re interested, email me at wallpaperlady@att.net and I’ll hook you up with the supplier.
The very edgy wallpaper? It’s by Spoonflower and called Serpents and Apples .

Sneaky Snaky Dining Room Accent Wall

August 6, 2022
Beautiful symmetry …
But look closer – those intertwining lines aren’t fronds of vegetation – they’re snakes !
The wall before. It’s a mid-century home, but the drywall here is new. Per my request, the contractor left it taped and floated , but not painted or covered with any coating .
I had planned to simply prime this wall. But after examining it more closely, the surface was a little grittier than I like. So I ended up applying a very light skim-coat and sanding it smooth .
Here the smoothed wall has been primed with Roman Pro 977 Ultra Prime .
I’m plotted out the center of the wall and am using my laser level to ensure that the design in my first strip falls right along the center, and also is nice and plumb .
My work table with two strips of wallpaper . Spoonflower packages its wallpaper differently from other companies. It comes in widths of 24″ and lengths of your choice of 3,’ 6,’ 9,’ or 12.’
Get their Pre-Pasted Removable Smooth option, which is water-activated , and is wonderful stuff.
Do NOT get the Peel & Stick , nor the Traditional Pebble . The P&S and the Traditional are both very difficult to work with, and can lead to bubbles and creases on your walls , plus cause damage when the wallpaper is stripped off later.
Back to the photo – the blue cube thing in front is my laser level , shooting its red line at the wall.
Close-up
I’m using this blue plastic tape on the edge of this strip of wallpaper. This will prevent paste from getting onto the wall or ceiling.
The accent wall stops in this left hand corner, so I need to trim off the excess. But I don’t want to get paste onto the un-papered wall. Paste can cause the wall paint to crackle and flake off.
So here you see how the blue tape is keeping paste off the wall. Once I finish trimming, I’ll check the back to make sure all of the blue tape has been removed. Any areas where the blue tape might be still on the back of the wallpaper , the paper won’t adhere to the wall .
This tape is available to paperhangers / installers . If you’re interested, shoot me an email wallpaperlady@att.net
Another thing about Spoonflower , the seams are meant to be overlapped, by 3/4″ . Note that this does create a ridge that runs vertically the length of each seam. In the grand scheme of things, this isn’t very noticeable.
Actually, there are advantages to overlapping seams in this manner. No worries about white substrates showing at the seams, nor the paper shrinking and leaving gaps at the seams.
Also, in case of unstable walls that might come apart ( delaminate ) under the tension of the drying / shrinking wallpaper, overlapping disperses the tension and helps prevent wall failure.
This pattern is called Serpents and Apples and is by Spoonflower . Spoonflower has a lot of cute designs , and also a good number of fun avant garde patterns like this one.
The homeowners have some other non-typical d├ęcor that will meld perfectly with this wallpaper. Think life-sized skeletons .
… Notice how that light fixture hanging in the center of the wall kinda looks like a skull ? …
The home is in the Oak Forest area of northwest Houston .

Wallpaper Paste Residue = Crackled Paint on Bathroom Cabinet

July 14, 2022
Adding to my previous post, here is the wooden door to the medicine cabinet, which took on a lot of paste when the previous installer hung wallpaper. He evidently was unable to successfully wipe off all the paste.
The unfortunate aftermath is that the paste will eat into paint that is existing, or that is applied later, and cause it to crackle and flake.

Wallpaper Paste Residue = Crackled Ceiling Paint

July 13, 2022

You’re looking at the junction between a wallpaper border at the top of a wall and the ceiling. You can see crackled and flaking paint on the ceiling.

This was almost surely caused by the previous wallpaper installer getting paste on the ceiling (which is typical and normal) but failing to wipe it off completely.

The paste is clear and difficult to see. Even when you do a diligent job, it’s easy to leave some residue behind.

The problem is that wallpaper paste attacks water-based paint, and will cause it to do what you see above … crackle, flake, chip off. This can happen if the paint was in place before the wallpaper paste got on it, or if there was paste residue and fresh paint was applied on top of it.

In fact, the decorative paint finish called “crackle finish” is accomplished by applying hide glue onto a surface and then coating it with latex paint.

The crackly paint on the ceiling is unattractive, and impedes adhesion. It takes a lot of scraping and sealing and skimming the wall to rectify this.

A way to avoid this is to astutely wipe off all paste residue. Better yet, what I do is to use special plastic tape at the top of my wallpaper strips, so that no paste gets onto the ceiling in the first place. Do a Search here to see previous posts describing that technique.

You can also use a stain blocker like KILZ Original oil-based primer, or BIN shellac-based primer, to seal off the area before painting. There are water-borne primers that claim to seal such problem areas – but I prefer to stick with oil or shellac.

Whoops! Someone Painted Over Old Wallpaper

April 21, 2021

Just looking at the walls, I had not noticed . But when I removed the light switch cover, it was clear that someone didn’t bother to remove the old wallpaper, and just painted over it.

Actually, they probably did do some prep, because you could not see seams under the paint. They must have taken steps to cover the seams.

And there was no flashing … difference in texture between paint over wallpaper, for instance, and paint over smoothing compound that was used to disguise those seams.

And there were no bubbles (caused by latex paint on top of wallpaper that absorbs moisture from the paint and swells) and only a few tiny loose areas.

Still, it would have been better if the previous guy had put some effort into removing the wallpaper, and then washing the paste off the wall and then sealing with a stain blocker, to prevent paste residue from causing the new paint to crackle and flake off the wall. Then the room would be adequately ready for paint.

Doing the Opposite Today – Removing Wallpaper

September 30, 2020


The large medallion on soft lavender on all walls of this large bedroom worked well for this gal for many years – but now that she’s an older teen, it was time for an update.

So instead of putting wallpaper up, today I took it down.

Most people think that stripping wallpaper is difficult. But if the walls were prepped properly, and if the paper was hung properly, and if the proper removal steps are followed, it should all go well, with minimal damage to the walls. See my link at right, on how to strip wallpaper.

The most important thing is to separate the top, inked layer of paper from the backing / substrate layer. I find that wetting this top layer with a sponge and plain water helps strengthen the fibers, so the top layer can be pulled off in larger strips.

In the second and third photos, you see how the purple layer has been stripped off, leaving the white backing attached to the wall. This top layer has to be removed, because it has an acrylic (or vinyl) coating, and will not allow water to pass through it.

The next step is to soak the backing with plain water and a sponge (see photo). No chemicals, no additives – just plain warm water. You will have to reapply water several times. The idea is to let water soak through this backing layer, to reactivate the paste underneath. Once that paste is good and wet, it should release from the wall. Sometimes you have to gently scrape the backing from the wall. But in my case today, once that paste was reactivated, the substrate layer came away from the wall in full, intact sheets. Easy peasy!

One photo shows my “dull” 3″ stiff putty knife. I call it “dull,” because it’s old and beaten up. But it’s really rather sharp. I use it to carefully get between the inked top layer of wallpaper and the bottom substrate layer. And then I use it to gently scrape wallpaper from the wall.

In my case today, the previous installer had done a superb job of hanging the wallpaper. He applied a primer before hanging the paper. That primer helped make this whole removal job go well, and it protected the walls from damage.

The family will need to apply a stain blocker to prevent any residual paste from causing the new paint from crackling or flaking off. Once that’s dry, the walls can be textured and / or painted. The room’s resident told me that she is planning to go all white.

This home is in the West University area of Houston.

Keeping Paste Off The Paint

March 10, 2020


My next strip of wallpaper will be placed to the right of the strip in the photo, and it will need to be trimmed horizontally along the rounded (bull-nosed) edge of the wall.

To keep paste from the wallpaper from getting onto the wall paint during trimming, I have placed special 2″ wide, thin blue plastic tape along the edge of the wall.

Once I have finished making my trim cuts, I will remove the blue tape. There will still be sufficient paste on the wallpaper to hold it to the curved edge.

No need to wipe anything, no paste on the paint, and no worries about paste causing the paint to crackle and flake off the wall down the road.

Crusty, Flaky Stuff on Woodwork

March 2, 2018


You’re looking at a section of crown molding. See that flakey stuff? That is the enamel paint on cracking and chipping off the woodwork. Why? When the original wallpaper was installed, some paste got on the crown molding. This is normal.

But in this case, the paperhanger didn’t wipe off all the residue (this can be hard to do, because it’s really hard to see). Over time, that paste residue ate into the paint and caused it to crackle and chip off the wood.

This can be avoided by making sure that all paste residue is completely wiped off any painted surfaces. I like to use a thin blue plastic tape on the top edge of wallpaper, which keeps paste from coming in contact with the crown molding or ceiling.

Crinkly Paint Caused by Paste Residue

July 12, 2016

Digital Image

Digital Image


Hard to discern, but the red / brown at the top of the photo is wallpaper, on the vertical side of a soffit around the top of a dining room. The greenish area is the bottom of the soffit.

The craggly looking stuff at the junction is crackling paint. Why is this paint getting crackly and crumbly?

Wallpaper paste will cause paint to crackle. The original installer must have left a teensy bit of adhesive on the wall (which is easy to do), and, over time, a reaction occurred, and a very small strip of paint began to crack and flake.

This was only about 2″ long, and 1/16″ wide, and 10′ up in the air, so, not anything anyone is really going to notice. And, over a decade and a half, nobody ever did. Only me, when it was time to strip off the old paper.

I do find these little things interesting, though, because they help me be aware of things that can happen, and help me to take measures to prevent them when I am installing a wallpaper job.