Posts Tagged ‘clay’

Stains Bleeding Through Wallpaper

March 9, 2023
This is the current wallpaper, and I’m to put a new paper in this powder room.  For various reasons, this paper cannot be stripped off the wall , so I’m prepping the walls to be able to hang the new paper on top of it .  Normally, my favorite Roman Pro 977 Ultra Prime will seal this effectively enough.  But – hard to see in this photo – but this existing paper looks dirty to me.  Some of that is due to the mottled look of the pattern / colorway .  But I’m seeing tan discoloration , and I think it’s coming from under the wallpaper . 
This home was built in the early ‘90’s , and in a neighborhood where , through stripping off many old wallpapers in order to prep for new installation , I’ve noticed that someone working in that area and era used what we call clay-based paste .  This paste is made using actual clay – i.e. dirt – and has a reddish color .  I  believe that this red clay paste is able to work its way through wallpaper, and creep onto the surface, causing a subtle “dirty” cast to appear on the wallpaper. 
Once you strip the old wallpaper off the wall, the wall can then be washed , and hopefully you’ll get all the clay paste off .  But usually, no matter how much you scrub, residue will remain.  I fear that that residue will work its way through the new wallpaper, as well. 
Additionally, the most severe stains are in the vicinity of the toilet – housekeeper splashing cleaning agents?  or little boys with bad aim ??  
Yes, most homeowners will never notice this, especially since it can take years to show up.  And the paper I’ll be hanging is black , so it’s highly unlikely that any discernable stains will become visible .  But I get a little anal about wanting jobs to look perfect. 
 
So I like to use a stain blocker , which will ensure that no discoloring elements will work their way through .  My two favorites are KILZ Original , oil-based primer .  KILZ is wonderful, unparalleled stuff.  But it does have strong fumes , so you have to ventilate the room thoroughly and also wear a chemical respirator while applying it, to avoid becoming “high.”  i.e. “sick”   
My other option is BIN , which is shellac – based  .  This is also an excellent stain blocker , and has a strong smell , but nothing that will kill your brain cells .  Since my current clients have little kids, I opted for the BIN . 
Unless you want to go through a LOT of paint thinner and mess , you can’t easily wash oil-based or shellac-based liquids out of your roller cover or brush es .  So I plan to use disposable rollers and brushes.  This doesn’t mean cheap rollers and brushes – it just means that I factor in that these will be used once and then thrown away. 
Speaking of factoring in costs – the gallon of BIN was  $70 (and that was a reduced price due to dented can).  The KILZ was $40 , but I would have had to purchase a new respirator and cartridges , which would have added an additional $40 – some of the respirators went up to $70.  March 2023 prices . All this needs to be considered when figuring up the price for doing a wallpaper job.   I’ll also note that these products can be difficult to source – my local hardware store, which typically has stock even when larger outfits are out , had only one can of KILZ and one scratch-and-dent can of BIN .  Whichever I would have chosen, I sure got lucky. 
Note that these stain blockers are formulated to block lots of nasty stuff – water stains , blood , rust , wood sap / knot holes , ink , tar , grease , crayon , lipstick , cooking stains , marker , Sharpies , etc. 
Back to BIN….  It’s very watery and runny and drippy .  So you really have to cover the floors and baseboards , as well as countertops , toilets, etc.  Microfiber roller covers help a lot to minimize splatters .  Roll slowly and in an upward motion . 
Oh – additional plus … both BIN and KILZ dry quickly, so you can apply it and then move to your next step in less than an hour. 
Besides the shadow-y paste residue , this room has other issues .  Here, someone used ink pen to mark placement of the hooks for the powder room mirror .  Eeek!  Ink will bleed through paint and wallpaper even faster than clay paste residue will.  Here you can see one coat of the BIN applied – but the ink seems to have  been “resurrected” and is actually enlarging and spreading, and bleeding through the stain blocker . 
Here I’ve spot-primed with a heavier coat of BIN , and that appears to be holding the nasty ink at bay . 
Note that wallpaper paste will not adhere to oil-based products like KILZ , and probably not to shellac , either, because it dries kind of glossy.  So whichever of these primers you choose to use, you will need to top-coat with a primer formulated for use under wallpaper – and that will adhere to the stain blocker.  Tomorrow, I’m going to follow up with Roman Pro 977 , as mentioned above . 

Trick for Keeping Paste on Edges Wet and Workable

December 22, 2022

After you paste a strip of traditional wallpaper , it needs to be folded pasted-side-to-pasted-side and then set aside for a few minutes, so the paper can absorb the paste , expand , relax , etc. Preferable to place it in a black trash bag while this is going on, to help prevent it from drying out during this booking time .
But sometimes papers still dry out , particularly at the edges . The composition of the substrate , as well as the type of adhesive will come into play here.
And some papers just want to curl at the seams when they get wet with paste .
One trick to help curtail this is to paste the paper, book as usual, roll up gently, and then dip just the bottom 1/8″ of the edge into a bucket of clean water. This bit of water helps keep that paste damp and workable , and also encourages the wallpaper edges to curl toward the wall rather than away from it.
In today’s instance, because I was working with delicate paper and a contrary clay -based paste , I chose to dip the edges in water before pasting. This was my first time to try this method, and it worked great .
You do have to ensure that the water doesn’t wash the paste off the paper, or dilute it. Because you need that paste there to hold the paper against the wall!
Note: Do not do this with non-woven papers , which are also called paste the wall . Excessive moisture can cause staining .

Another Installer’s Problems With British Pulp Paper

May 31, 2022
Scroll down a few posts to see where I hung this exact same pattern, and coincidentally just a few blocks away. I had absolutely no problems. Yet this poor installer struggled and ended up with many dissatisfactory issues.
In this photo, you see where the wallpaper has shrunk at the seams and left a gap, some tears, and a patch to cover a mishap.
More tears and gaps.
Paper coming lose from the wall. Not taking primer or paint with it. But you can see the adhesive clinging to the back of the paper. I’m suspecting this is clay adhesive. Nothing wrong with clay, but I prefer one of the vinyl-based adhesives.
Not sure what the guy used as a primer (if any).

This is the popular Strawberry Thief by William Morris , usually sold by Morris & Co. I’m believing the problem here is the material on which this pattern was printed.

The site from which this was purchased called it a ” heritage ” paper. It is, indeed, made of what we call a British pulp material. Old-fashioned, it is. These days, most wallpaper coming from the U.K. is printed on non-woven stock. The paper I hung a few days ago was non-woven.

Pulp wallpapers have a nice look. But they have no protective coating, so become soiled easily. They soften when wet with paste and tear easily, and can also shred under the razor blade while trimming. They expand when wet with paste, and then shrink as they dry, which often results in gaps at the seams.

Even skilled installers can have difficulties when working with this stuff. In fact, on the private Facebook page of the Wallcovering Installers Association ( WIA ), we have just been discussing this very same topic.

I believe this previous installer had a few shortcomings, such as lack of skill and maybe used the wrong or no wallpaper primer. But I think the real and unsurmountable culprit was the substrate.

Moral: If given the option, choose a non-woven material. They are made with minimum 20% polyester content, and thus are resistant to shrinking, tearing, and tension at the seams. Many other advantages, too. Non-wovens are also referred to as paste the wall .

Rebel Walls Gives You Paste

February 24, 2022
I carry 5-gallon buckets of wallpaper paste in my van. But to make it easy for DIY’ers, rebelwalls.com includes a box of paste with every order. This is powdered paste that needs to be mixed with water. This may be lightweight and easy to ship, but I don’t like to use it when hanging a non-woven material like theirs.
Non-wovens are prone to staining and blushing (look like they’re wet but never dry out) . Most often this is caused by the paste – usually a paste that is too “wet” or, in other words, has a high moisture content. Roman 880 is notorious for this, as is Dynomite (now Roman) 234.
But a paste that you make by mixing powder into water seems even more risky for having a high water content, and causing staining. And so is the practice of dampening the back of the paper with a damp sponge, or a spritz of water from a squirt bottle. In my mind, too much water / moisture = risk of staining or blushing.
I say, skip the anxiety and use a low-moisture pre-mixed vinyl adhesive such as Roman 838 or Dynomite 780 (also now made by Roman). Clay pastes are also known for low water content – but I definitely do not recommend on a non-woven material, as I’ve seen the red clay bleed through far too many wallpaper surfaces.

Special Paste for Special Paper

July 22, 2020


Most wallpapers can be hung with standard wallpaper pastes. But some papers are more delicate or have special characteristics (silk, vintage, non-woven, prone to curling seams,) and thus call for special pastes.

When certain pastes are used, non-woven wallpapers like this one can display “blushing” or “staining,” which look like wet spots that never dry.

This manufacturer, Rebel Walls, has included a box of paste that is specially formulated to work with non-woven material. It is a powdered potato starch-based paste that is mixed with water on-site, allowed to set up, then mixed again, and then it’s ready to use.

To be honest, I probably wouldn’t use this paste. With the propensity of non-wovens to blush and stain, the less moisture you introduce, the better. So I would opt for a pre-mixed clear paste, such as Roman’s 838 or SureStik 780. But beware – some other types of clear pre-mixed pastes will stain (880, 234) and probably clay pastes will, too.

Arts & Crafts Authenticity in a 1908 Heights Home

July 16, 2020


This home in the Woodland Heights neighborhood of Houston dates back to the very early 20th Century, back when the Arts & Crafts movement was in full force. The style emphasized nature, earthy colors, blocky features, and stylized designs.

I like this look a lot, so it was really fun to work with the wallpaper and help bring their living room to their vision. They have the period furniture to go with it.

The wallpaper is by Bradbury & Bradbury, a California company that makes wallpaper in vintage and antique designs – Victorian, William Morris, Art Nouveau, Arts & Crafts, Oriental, Atomic Age, ’20’s, and more.

Their paper is a little tricky to work with. First, there is an unprinted selvedge edge that has to be trimmed off with a 6′ straightedge and razor blade (search here for other posts showing that process).

The manufacturer calls for clay-based paste, which I hate, for various reasons. But to comply with their specs, I bought a $50, 50lb, 5-gallon bucket of it – and used only about 1/2 gallon. Clay is a low-moisture paste, which helps with this material.

When wet with paste, the heavy inks on this paper absorb moisture differently from the paper backing, and the result is “waffling” or “quilting” – which is when you get wrinkles inside the unprinted areas (do a search here for more posts on this issue). To prevent this, it helps to lightly dampen the surface of the paper with a sponge and clean water. This helps even out the moisture ratio. I found that this pattern also fared better with a little water sponged lightly onto the back, as well.

To handle the 20′ long horizontal strips, after pasting, I folded the strips accordion-style. I also added blue plastic tape to the bottom edge, to prevent paste from getting onto the painted woodwork, which would eliminate the need to wipe it off during installation. Then all went into a plastic trash bag to “book” for a few minutes.

I set up two ladders, so I could step between them as I unfolded the accordion pleats, and I also used push pins to hold the booked strip up while I got down and moved the ladders.

The paper adhered nicely to the wall without curling at the edges. There were a few wrinkles in the inked areas, but these disappeared as the paper dried.

A wide decorative border like this, especially dating to this era, is called a “frieze.”

What’s really cool is that the homeowner (a former contractor), added the block wood molding because he wanted to unite the heights of the door molding with that of the windows (both just barely visible in the photos). That was way before they thought of adding a wallpaper border. Once they discovered Bradbury and started hunting for a wallpaper, turns out that the height of the space between the two moldings was exactly the height of the wallpaper frieze.

Even more amazing is that the paint colors were chosen before they went searching for wallpaper – but are magically perfectly harmonious with the colors in the frieze.

This wallpaper pattern is called “Birchwood Frieze,” by Bradbury & Bradbury. They have lots more gorgeous stuff on their website.

Dark Paper Bringing Brightness to a Harvey Hurricane Flooded Home

June 28, 2018


This home in the Bellaire subdivision of Houston was flooded during Hurricane Harvey in August of 2017. Everything below the 4′ high water mark had to be cut out and thrown out. The homeowners loved the Mid-Century Modern vibe of their 1952 home, so, as the structure was put back together, they re-created everything as accurately as they could – baseboards, doors, cabinets, flooring – they even found a funky green refrigerator designed in the style of what I can only describe as an old Studebaker sedan.

When it came to wallpaper, they wanted something to reflect the vintage vibe. After much research, they agreed on two papers from the Bradbury & Bradbury Vintage ’20’s collection. This colorful bird-flowers-and-foliage-on-black pattern went in their sun room, which can also be called the piano room.

The ’20’s Vintage wallpaper collection is pretty new from Bradbury and Bradbury, which is out in California. This company produces historic-styled patterns from eras such as Art Nouveau, Art Deco, Victorian, Asian, and more, right on through into the new offerings based on designs from the “Modern Age.”

Like many higher-end or specialty and / or “boutique” wallpaper brands, this paper came with a selvedge edge that had to be trimmed off by hand (by me!). The manufacturer’s trim guidelines were spot-on, and so the edges were nice and straight, and the pattern design matched from strip to strip perfectly.

This pattern is digitally-printed on a paper substrate with a somewhat shiny surface. I found that it accepted the paste (clay paste is recommended, to mesh with the paper which is printed on a clay-coated substrate) with no protests, and, after appropriate booking time, the paper handled nicely and the seams laid down nice and flat. That slightly shiny surface also allowed me to wipe any stray spots of paste off the surface.

Because the paper was black, I did take the extra step of using a piece of black chalk to color the edges of the strips, to keep the white substrate from peeking out at the seams.

This room holds a grand piano, and is in the back of the house, where it looks out onto the patio and backyard. It gets a lot of sunlight in the daytime, and the colors in the wallpaper will really stand out, and will bring a lot of light into this very deserving home.