Posts Tagged ‘slip’

Wallpaper Inks Easily Marred

December 21, 2022

The rich colors and clay coating give this wallpaper a truly luscious , velvety look. But they’re also fragile and can be damaged easily . Here you see damage caused at the factory simply by folding back the last 2″ or so of paper, before rolling it up. The company does provide and extra foot or two to accommodate this.
You have to be extremely careful handling this stuff. Even a fingernail or your wallpaper tools can cause scratches or marring . Per the manufacturer’s suggestion, I covered my smoothing brush and plastic smoother with microfiber towels , to minimize chances of scratching the paper .
In fact, the manufacturer suggested that, during installation , that you wipe the entire surface uniformly with a damp microfiber rag , to even out any imperfections that might have resulted .
Now, just between you and me – if you know you have a product that’s likely to end up with blemished areas, why not just switch to a better , tried-and-true ink ? SMH Luckily project this is a border that will be butted up under the ceiling , so no one’s going to zero in on a few shiny areas in the matt ink. But , think of all the homes that will have this same material as a wall paper , that will be viewed close-up .
Not all colorways from Bradbury do this. I’ve hung plenty of it and not had a problem with most. In fact, the “fishnet” area you see at the bottom of this picture is not delicate at all. It’s the very matt finish green and brown colors in the center of the border that are so delicate .
The inks and clay coating the manufacturer uses on this particular colorway are very fragile and mar easily , so I’ve used ankle socks to cover the edges of my straightedge, and also a weight I’m using to prevent the paper from rolling around on my table. And that scissors is just there as demonstration for the photo … you can bet that tool was not touching the surface of the border at any other time.
This material has a selvedge edge that has to be trimmed off by hand , with a straightedge and razor blade . Normally I set my straightedge on top of the wallpaper , because it’s easier to see where I need to make my cut , and also because the weight of the straightedge helps hold the wallpaper down.
But even with cushioning socks on either edge of the 6′ long tool , and with padding on the underside, I was afraid that it might harm the inks .
So I placed it on the outside edge of the wallpaper. This left very little for the tool to grab on to, so I made sure to press it tightly against my work table , so the wallpaper strip wouldn’t slip around while I was trimming .
The manufacturer is Bradbury & Bradbury . They specialize in historic and period-correct patterns from the 19th and early 20th centuries.

Paint Pulling Off Wall Where Tape Was Removed – Surface Stability Test

May 12, 2021
Paint pulling off wall where tape was removed.
Paint pulling off wall when painters tape was removed.
Paint pulled off wall and stuck to back of tape that was pulled off wall on new construction site.

It’s important to have a stable surface under wallpaper.

That’s because, when wallpaper gets wet with paste, absorbs moisture from the paste, and it expands. Then, as it dries, it lets go of the moisture and shrinks. When wallpaper dries and shrinks, it puts tension / torque on the walls.

If the surface under the wallpaper is not stable, the tension of the drying wallpaper can cause the underlying surface to pull away.

This photo is not showing the wallpaper pulling away from the wall. What is happening (usually) is that the paint (or whatever has been applied to the wall), has actually delaminated (come apart) from the wall.

This results in a “curled” seam, or a “popped” seam.

One way to test for this is to apply a strip of tape (blue painters tape, tan masking tape, clear Scotch tape, or other), let it sit a few minutes, and then yank it off. If the tape takes any paint along with it, you have a potential problem of the wallpaper not adhering correctly.

This is why it’s important to:

1, Before applying any coating, you must remove all dust from the wall, using a damp sponge, which must be rinsed frequently

2, Before hanging paper, a primer formulated specifically for wallpaper should be applied / rolled on and cut in to edges

A wallpaper-specific primer is designed to withstand the torque put on the wall as wallpaper dries. And it facilitates installation by allowing sufficient “slip” (maneuvering the paper) and “stick” (adhesion). The chemistry behind all this is fascinating – but too complicated to get into here.

If a wall is too “iffy,” and you don’t feel like the mess and expense of scraping off all the old paint, a liner can be applied before the actual wallpaper is hung.

A liner lessens the drying time of the wallpaper, which reduces the time there will be stress on the wall. A liner also redistributes stress on the wall, so much less chance of having seems detach from the wall.

A liner also adds additional cost to the job – for both material and labor, which may include an additional day(s).

Don’t Skip the Wallpaper Primer!

October 30, 2019


A primer is imperative for a good wallpaper installation – and I mean a primer designed to be used under wallpaper, not a generic primer or a paint primer.

A good primer will

seal porous surfaces
mitigate a glossy surface (paper won’t stick to gloss)
allow for “slip” and repositioning while installing the paper
provide “tooth” for the adhesive to grab ahold of
withstand the torque created when wallpaper dries and pulls taught,
preventing “popped seams”
protect the surface, making future removal of the paper easier while
preventing damage to the wall

Ultra Prime Pro 977 by Roman’s is my preferred primer.

But different situations call for different primers. When hanging on a thirsty surface like new drywall or a textured wall that has been skim-floated, I will use Gardz by Zinsser. Other primers could be called for in other situations.

No Primer Under Wallpaper = Torn Drywall

July 24, 2017

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Today I stripped wallpaper off a kitchen where the previous installer had not bothered to prime the walls first, but hung his paper right on top of new Sheetrock.

This is very bad for many reasons.

` The walls will not have stick, so the new wallpaper will not have a proper surface to cling to – and this can cause curling seams, loose areas, and other problems.

` The walls will not have slip, which will make it much harder to install the new paper.

` With nothing separating the new wallpaper from the drywall, the paper will bond to the drywall, making it darned near impossible to get it off later.

This is what happened today. After I removed the top inked layer, and after I soaked the remaining paper backing for a while, the old wallpaper came away from the sections of the wall that were coated with joint compound or paint or wood stain.

But in areas of the wall that were just uncovered Sheetrock, the wallpaper grabbed tightly and could not be pulled off or scraped off. In stripping the wallpaper off these areas, some of the drywall came away, too, leaving areas that were torn and damaged.

These uneven, torn areas are problematic, because they leave bumps and ridges showing under the new wallpaper, and because, since they have no protective coating, they absorb moisture – from water, wallpaper paste, wallpaper primer, or other, and then they expand and then they bubble. Ridges and bubbles look like Hell under wallpaper.

The first photo is a wall to the right of the kitchen counter, where differing layers of drywall have been pulled off the wall. The dark brown area is the deepest.

The third photo is a newish product that is wonderful for sealing and “repairing” torn drywall. Gardz (by Zinsser) is a penetrating primer / sealer that soaks into the surface, binding things together. It dries quickly. When it is dry, it is impervious to moisture – which means that you can apply a water-borne primer over it, or you can skim-float it with joint compound, and not worry about bubbles appearing.

I applied Gardz to these areas of torn Sheetrock, let it dry, then skim-floated over it with joint compound, and then sanded it all smooth. Then I applied a second coat of Gardz.

In addition to making the surface very stable, Gardz serves as a good primer for wallpaper, because it’s molecular structure on its dry surface is such that the molecules of paste, attached to the new wallpaper, will grab on and hold tight.

In this case, because I like a white pigmented primer, and because I like hanging on it, I went over the walls with a coat of Roman’s Ultra Prime Pro 977, a primer made specifically for wallpaper. The last photo shows the wall after all that work. Finally ready for wallpaper!