Posts Tagged ‘laser level’

Welcoming Room for Mother-in-Law

August 24, 2022
This young couple hosts the mother / mother-in-law a few times a year, and are lucky enough to have a private spare bedroom for her. To make it special, they wanted to jazz up the area a little. Enter this fun and whimsical wallpaper pattern .
The room before was a pretty shade of murky teal – but needed personality and warmth.
The wall started out with a light orange peel texture . I skim-floated the wall, and then sanded it smooth .
Along the baseboard at the floor , here’s the dust from sanding , along with the sanding sponge I use – this is a modern take on the idea of wrapping sandpaper around a block of wood .
I tack painter’s plastic across the wall from ceiling to floor to prevent dust from getting into the room or onto the furniture .
Here’s the wall smooth and primed , ready for wallpaper .
Since this is a dark wallpaper and I want to be sure that the white wall does not peek out from behind the seams, I stripe dark paint along the wall under where the seams will fall. Because non-woven papers don’t expand when wet with paste , it’s simple to measure the width of your strips and plot out where each seam will fall. Use the laser level as your guide . Do a Search here (upper right hand corner) to read more about this technique.
I use craft paint from Texas Art Supply (or any hobby store ), diluted with water from a Gatorade bottle cap , and applied with a scrap of sponge .
Further insurance is taking a chalk pastel (never oil pastel – oil bleeds and will stain wallpaper) and running it along the edge of the wallpaper strip – from the backside to avoid staining the surface – to cover the white substrate the wallpaper is printed on. This is to prevent white from peeking out at the seams , which can happen with dark papers.
Centering the first strip in the middle of the wall, and using my laser level to ensure the strip is nice and straight and plumb .
Note: The strip is not centered on the wall. The dominant pattern element is. Notice that the center of the dominant pattern motif – the white circular flower – is 3.5″ to the right of the left edge. This means that I had to position the left edge of the wallpaper 3.5″ to the left of the center of the wall, in order to get the round white flower to fall down the center of the wall.
When you look again at the finished photo, you’ll notice that the white flower falls down the middle of the walls, and that it also appears at equal distance from both the right and left walls.
Most people wouldn’t be able to put their finger on this symmetry , but it is something they subconsciously notice , and it lends a feeling of orderliness to the room.
As orderly as you can be, that is, with pigs dancing around the meadow dandelions !
Finished accent wall . The three other walls painted in blue were a bit of a surprise, because one would think the more dominant color of green would be used. But with so much green in the wallpaper, green on the walls, too, would have been too much, perhaps. I like the cool feeling that the blue creates .
There is plenty of the exact same blue in the wallpaper pattern to tie the walls and wallpaper together.
Close up shows the stamped printing technique .
You’ve gotta love a frolicking pig in a hand-knitted sweater!
This pattern is called Hoppet Folk and is in the Wonderland line by Borastapeter , a Scandinavian company .
It’s a nice, sturdy but flexible non-woven material that can be hung via the paste the wall installation method .
In addition, this product will strip off the wall easily and in one piece , with no damage to your walls, when it’s time to redecorate.
This is a very popular pattern, and I’ve hung it more times than I can count, just in the last two or three years. It does come in other colors – but most people gravitate toward this black version.
The townhome is in the Rice Military area of central Houston .

Grasscloth Engineering and Logistics – Technical Details Post

August 21, 2022
Grasscloth is a natural material that cannot be matched from strip to strip, so all the seams will be visible . In addition, there is usually a slight but noticeable color difference between strips / panels (called shading or paneling ) . So it’s important to plot the layout of the strips to give the most visually pleasing overall look. Usually this means balancing the width of strips so they are all equal , at least on the same wall . We call this engineering .
This wall presented particular challenges , due to the widths of the elements. Grasscloth comes 36″ wide . You can use your straightedge and a sharp razor blade and trim it down to any width you want.
The width of both the large wall spaces to the right and left of the bank of windows was 34.” The width of each window was about 35.” The width of the two spaces in between the windows was 7.”
So you’d think I could trim my panels on either side of the windows, and then over the windows, to about 34″-36″ – give or take a few inches (or fractions thereof).
But that would leave me with two 7″ wide strips between these 35″ panels. Although the look would be uniform and mirror-image from the center outward, moving from right to left you’d have: 35,” 35″, 7,” 35,” 7,” 35,” 35,” … those 7″ breaks were just not going to look right.
One option was to determine the width of the wall (189″) and make each strip an equal width. This worked out to six strips, each at 31.5″ Not good, because this would mean a seam down either far side. And since those sides were 34″ wide, that would mean a 31.5″ wide strip and a strip 2.5″ wide. Not attractive at all, and it would use up an extra strip of wallpaper.
This six strips @ 31.5″ wide scenario might also land with a seam smack in the middle of those 7″ wide interludes in between the windows. Not attractive at all.
So I decided to make the two outer strips 35″ wide. That left 119″ of wall space above the windows to be covered with wallpaper. Do some math and you get four panels of 29.75″ wide. This gave a balanced and uniform look to the area over the windows, and also prevented seams from landing between the windows.
Moving right to left, I cut and hung the full length outer strip first. Then I cut and hung the strip over the window on the right. Then I measured to find the centerpoint of the window in the middle. Turns out it was a bit less than 29.75″ away. So I trimmed that next over-window strip accordingly.
Once that was in place, I measured from that center point above the middle window out to where my left full-height panel would fall, 35″ out from the wall. Took the resulting measurement and divided by 2. Lo and behold, each of the next two panels over the window was going to be a bit wider than 30.” No problem. No one (but a paperhanger or maybe an engineer) is going to notice a 1/4″ or even a full 1″ difference in widths between this strips over the windows.
Another thing to point out … it’s important that I took measurements before cutting these strips for this second left-hand section. Because, since grasscloth comes at 36″ (and walls can be wonky), if my strips had been narrower (say, 28″), that last full-height panel on the left might have ended up needing to be 37″ wide – and that wouldn’t work because it only comes 36″ wide – plus you need at least 1/8″ to wrap around the corner.
Luckily I had the flexibility to be able to trim the panels over the windows to any width needed, to accommodate all this.
If you’ve followed all this so far, let me also toss in that we also need to figure how to get paper in between those windows. More on that below.
In this scenario, I’m moving from right to left.
Area beneath the windows needs to be treated in the same way, and preferably with widths that match what’s going on above the windows. In addition, it’s tricky because after you move across 12′ of wall space, the strips above and below the windows are going to twist and torque out of shape, so that last full-length panel on the far left might not butt up perfectly with the last strip under the windows.
The grasscloth is black , and my wallpaper primer is white . It’s common for teeny gaps to appear at the seams . In this case, it’s likely that white wall would peek out from those gaps. So I like to stripe under where the seams will fall with dark (diluted) paint . This takes measuring , plotting , and also a heat gun to get the paint to dry before the wallpaper hits it, to avoid staining. You can do a Search here to read more about this technique .
Now let’s talk about getting wallpaper in between those windows.
As you can see in the photo, if I hang a 30″ wide strip, a whole lot of paper is going to be cut off and thrown away. Also, a whole lot of sticky, pasted paper is going to bump against that window molding and maybe even the window glass. A lot to clean up! And unwieldy, to boot.
My solution was to stop the wallpaper just a little below the tops of the windows. Then I would patch in a 7″ wide strip in between the windows. This is trickier than it sounds, because, if it were a paper wallpaper, I could simply cut along a design motif and overlay the 7″ wide piece. But grasscloth is thick and overlaps don’t look good. Also grass has no design elements , and the reeds of grass don’t necessarily fall perfectly horizontal , and even if you cut everything perfectly true to square , if the window molding is a teeny bit off-plumb , then your edges won’t butt up perfectly.
So that’s a good reason for striping the black paint under where the butt join will occur.
Same thing for the sections under the windows. I measured and positioned the strips so that the top edge (which I had trimmed to be perfectly horizontal) fell between the narrowest part of the windowsill molding, for less visibility.
I admit, instead of butting the two pieces, here I did overlap the 7″ wide strip about 1/4″ onto the piece under the window, right at that narrow junction. It’s only about 3″ wide, and I figured no one is going to be examining it that closely, anyway. This saved me about a half an hour of measuring, trimming, testing, repeat, repeat.
This is my second window interlude, and by this time I had realized that it’s hard to trim stiff grasscloth around intricate moldings precisely . So I used paint to fill in the edges around the window molding, just in case there might be any gaps between the grasscloth and the molding, so you would see black instead of the white molding paint. I did this with a small sponge; if I had used an artist’s brush it would have been a bit neater and tighter to the conforms of the molding. But sometimes you’ve gotta relax and realize that no one’s going to be scrutinizing the insides of moldings below shin-level.
Area over windows finished, with drapes back in place.
Turns out this particular grasscloth is so uniform in color (quite unusual, I will add), that you can’t really see the panels , nor their equal widths , anyway. I’m still glad I took the time to do all this math and trimming.
Area below the windows, done. That last seam on the left bears some explanation, too. Moving across the top of the windows, I measured that that last strip – the full-length strip – would need to be exactly 35″ wide. It butted up nicely to the last strip above the windows.
But, due to twisting , shifting , expansion , unlevel and unplumb walls and ceilings , and other factors, there is a really good chance that that last 35″ wide strip would not butt up perfectly with the last 30″ wide strip under the window . So I planned to splice these last two strips together.
Yeah, the drapes are hanging there, I coulda overlapped the two strips about 1/2″ and the drapes would have covered it. With a thin wallpaper, I probably would have done this. But grasscloth is thick, and an overlap would be visible , and also the adhesive / paste can’t be trusted to adhere as well to grass as it would to paper .
So I plotted for a splice. Instead of trimming my last strip under the window to 30″ (read above), I trimmed it to 32″ wide. That way, when I hung the last full-length strip to the left, which was 35″ wide, it overlapped the piece under the window by a few inches. Then I did a double cut and spliced the two pieces. See below for details about that technique.
Grasscloth is 36″ wide, and this wall area is wider than that. So two strips were needed. This means you’re going to have a seam, and since grasscloth seams are always visible, it looks best to plot to have the seam fall down the center. It uses more wallpaper to do this, but it looks much better than having, for example, a 36″ wide strip next to an 8″ wide strip.
As mentioned above, in case you get thin gaps at the seams, a dark stripe of diluted craft paint under where the seam will fall, will prevent white wall from showing through.
Rounded / bull-nosed edges and corners have been popular in new construction for at least 10 years. I wish they’d go away. They’re very difficult to trim around, and hard for the paper to conform to and adhere to.
It’s very hard to trim around that rounded edge, because the paper is hanging over and blocking your view, because grasscloth is thick and stiff and your fingers can’t feel through it, and because the edges aren’t necessarily true and plumb so a laser level or other level won’t help you much.
I use this little gadget as a trim guide. It’s actually a small section of the same corner bead material that drywallers use when they assemble these walls. Cut to about 1″ long and notched in different places where you might trim along the edge of the wall.
It’s intended that you place your trimming knife in one of the notches and slide the gizmo along the edge and make your cut. I find that awkward and also inaccurate. So I prefer to use the notches as a guide and mark where I plan to trim with a pencil. Since this wallpaper is black, I used this marking pencil from my home sewing kit instead. Chalk might work, but I was afraid it might now wipe off completely.
The pink pencil line was barely visible, but it was enough for me to use a scissors to trim along the grasscloth. I like this better than using a razor blade as I can see better, and also less chance of scoring into the primer or wall. Which raises its own set of issues – do a search here to find previous posts.
Inside view of the trim guide.
Finished arch. Note the four panels of equal width above the arch. And two flanking full-height panels also the same widths.
I was lucky that there was no pattern to match, so I was able to butt my two flanking strips right up to the edge of the bull-nosed corner. No trimming needed! Then I measured the remaining width between these two strips (the area over the arch), divided by four, and cut four strips of equal widths.
I hung the two on the left, and then one on the far right. This left one strip still to be positioned to the right of center. So the pieces are going to meet over the arch, rather than the last strip falling in a corner.
Same as the last strip under the window (discussed above), it’s really difficult to get your last piece to fit in here perfectly. I’ve done it, but it takes a lot of measuring, trimming, testing, retrimming, and often starting all over again.
So I did a double-cut / splice.
A double cut involves cutting each strip an inch or so wider than it should be, and overlapping the two. Then you take a straight edge and sharp razor blade and cut through both layers. This handy tool is a wonderful non-slip guide for this process. It was invented by an installer colleague in the Wallcovering Installers Association ( WIA ) and she has them fabricated in various lengths (along with other cool tools ) and sells them on-line. Contact me if you’re interested.
Anyway, it takes a lot of strength to cut through two layers of grasscloth, so somewhat difficult for lil’ ol’ me.
You also want to be sure to not cut / score into the wall, because the tension of drying wallpaper can tug at the wall and cause it to actually come apart, leaving an open seam that’s difficult to repair.
So you’ve got to put some padding under the wall where the cut will take place. I use special strips of polystyrene (hard but flexible plastic) to pad the wall. Also invented by a colleague in the WIA , who also sells other cool tools and supplies. Contact me if you’re interested.
This black grasscloth was printed on a white substrate. If the seams aren’t absolutely tight, there can be worries about the backing showing through to the front. So sometimes we’ll take a piece of chalk or pastel (never oil pastel or permanent markers because they bleed and stain ) and run it along the edge of the paper – from the back, and taking care to not get chalk on the surface.
I do this frequently with dark papers ( do a search here to see previous posts ) but opted not to do it with this grasscloth. It wasn’t necessary, and might have stained the porous reeds of the grass. It was beneficial, though, to have striped dark paint on the wall under the seams, as mentioned above.
Ugh. Grasscloth comes 36″ wide, and this section of wall is 38″ wide. It’s not visually pleasing, nor is it easy from an installation point of view, to have a 36″ wide strip next to a 2″ wide strip. Or to use scraps and put a 25″ wide strip next to a 13″ wide strip.
So best to plan two strips of equal widths. Two strips, each 19″ wide, with the seam down the middle.
Actually, the strip on the left was 19″ wide, but I trimmed the strip on the right to 21″, because I like the wallpaper to extend 2″ over the top of the door molding. This provides a more stable surface in case of shifting foundation or walls, and less likelihood (knock on wood) of the seam opening up should the house / drywall experience shifting.
Note that design “rules” caution against seams down the middle of spaces. But it would have been more visually distracting (and used up more paper) to have made three strips of each 12.75″ wide. And would have looked even dumber to have used scraps left from other walls and put together two strips of disparate widths.
So the homeowner and I discussed during our initial consultation , and she was happy with the center seam. Once it was all finished, this particular grasscloth was so even in tone that you barely see the seams, anyway. Win-win!
This did use up additional paper, though, as noted in a previous photo above.

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 décor 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 .

Powder Blue and Mint Small Print in West U Bungalow Bathroom

July 21, 2022
Before, primed and ready for wallpaper.
For various reasons, removing these mounting brackets for the light sconces would have created more problems than it solved, so I left them in place and worked carefully around them. The difficulty is that the sconces are exactly the same size as the mounting plates, so it’s difficult to trim around these plates that jut out from the wall and still get the paper close enough that no gaps show around the base of the light fixtures. When possible, it’s much easier to remove them and put the paper behind them.
I chose to center the design on my first strip in between those two sconces, rather than on the faucet. Good thing this is a small and busy pattern, because neither the mirror nor the sink faucet were centered between the sconces. But no one’s gonna notice.
If you look in the middle of the photo, you’ll see the vertical red line of my laser level. I’m using this as a guide to place the motifs down the center of the space.
Here’s a shot of my laser level. Less than $100 at Lowe’s maybe eight years ago.
Finished sink wall. The hooks are for the large, white framed mirror.
Window corner next to the toilet. The mint green paint on the woodwork next to the light blue wallpaper print ties this room in beautifully with the other rooms on the first floor of this house. The colors also coordinate beautifully with some artwork in the dining room just steps away.
The pattern is called Aboreta and is by Thibaut , one of my favorite brands. It’s a traditional paste-the-paper material , and was nice to work with. Thin and breathable and should hold up nicely in a humid bathroom.
This was purchased from my favorite source for wallpaper and for help in finding what you’re looking for – Dorota at the Sherwin-Williams on University in the Rice Village . Her hours vary, so call before you head over.

Bright Colorful Wildness On Bedroom Accent Wall

May 29, 2022
Textured wall has been skim-floated, sanded smooth, primed, and ready for wallpaper.
Done!
Here’s how we got there …. First, this is a non-woven , paste-the-wall material. It’s nice paper, but very stiff and wants to remain curled up. So to get it to cooperate, after cutting my strips, I roll them backward, backing side facing out, and secure with an elastic hairband.
This helps get rid of the curl, and also ensures that when I’m on my ladder at the wall and unroll the strip, the face will not bump into the pasted wall.
After finding the mid point of the wall, and the center of the wallpaper pattern (beware – it’s usually not perfectly in the center or at the edge of the paper), I draw a plumb line (or use my laser level) and hang the first strip against it.
It’s important to start in the middle, first to get the pattern centered.
Next, because ceiling lines are never perfectly level, the pattern can start to go off-track as it moves across the wall. Meaning, the motif I placed at the tip of the wall may start drifting up or down.
By starting in the middle and working outward, any drifting is lessened because it’s split between the right and left sides of the wall.
Close up.
Called Amazon , this is by Clarke & Clarke, in their Animalia line. I hung some very colorful zebras from this same company just a few weeks ago – go Search and find the photos!
Matching pattern on the throw pillow, and a bolster pillow in the same colors against the white bedding really pulls the room together, and gives the colors more impact. The homeowner dabbles in interior design , and has really put together a Wow Factor guest bedroom !
The home is in the Garden Oaks neighborhood of Houston . installer

Dark Wallpaper – Preventing White Gaps Showing at Seams

February 24, 2022
Dark papers are popular right now. But since wallpaper shrinks a tad when it dries, and since it’s usually printed on a white substrate, it’s possible that hairs’-breadth gaps of white wall may show at the seams. One way to prevent that is to stripe the wall under where the seams will fall with a color similar to the background of the wallpaper. Be careful to not get it too dark, as too much pigment may interfere with the wallpaper primer’s ability to perform optimally.
I measured the width of the strips, and then used a laser level to guide my stripes.
I use craft paint from the hobby store, and daub it on with a scrap of sponge (right) and dip into a bit of water, which I keep in a Gatorade bottlecap (left).
To get rid of the white edges of the substrate, I use a bit of chalk (some folks use paint – but make sure it’s water-based …. NEVER use oil-based paint, markers, or chalks, as they will bleed onto the surface of the wallpaper). I run the chalk along the edge of the wallpaper strip, making sure to work from the back side, to prevent the chalk from working its way onto the surface of the wallpaper. Use a light touch, but cover all of the white edge.
Finished wall. Don’t see no stinkin’ white gaps! 🙂
The mural pictured is by RebelWalls.com

Paint Stripes to Prevent White Wall Peeking Out

January 8, 2022
Sometimes (usually) wallpaper expands when it gets wet with paste and then shrinks just a tad when it dries. This can result in hair-breadth gaps at the seams. Usually not a big deal. But when the paper is dark and the sub-surface is light, you can end up with white wall visible at the seams.
So sometimes I’ll paint a stripe of matching color behind where the seams will lie. Measure to plot where the seam will fall, then use a level and pencil, or a laser level, to indicate where, and then run a stripe of paint along that line. Make the stripe wide enough to accommodate slight variations in measurements and wallpaper expansion.
I use craft paint from the hobby store or Texas Art Supply. The photo shows an outdoor paint – not the best option, but it’s what I had in the truck. 🙂 I use a small rectangle of sponge dipped in water and then in the paint.
For extra assurance, on thick papers, dark surface printed on a white backing, you can also use artist’s chalk pastels (chalk only and NOT oil pastels) to color the edges of the seams. Do a Search here (upper right corner) to find previous posts about that.

Soft Geometric Accent Wall in Mother In Law’s Suite

October 22, 2021
Headboard accent wall before. Textured wall was skim-floated and sanded smooth, then primed. Now it’s ready for wallpaper.
Finished.
Closer look.
Detail. The seams were invisible. The lines on this paper are raised a bit, so there is a 3-D effect.
I hung this non-woven wallpaper by the paste-the-wall method. Here I have rolled the strips backward, to prevent the decorative surface from hitting the paste on the wall. When I’m at the top of my ladder, I will take off the elastic hairband and let the paper unfurl down to the floor. It’s rolled so the top of the strip comes off first.
I have measured the wall and noted where the center point is, then determined where I want my first strip to fall. The black box in the foreground is my laser level, and you can see the vertical red line it’s shooting at the wall, which is where I am going to line up my first strip.
Positioning the wallpaper strip along the vertical laser line.
This muted geometric pattern is in the Jaclyn Smith Home line by the Trend division of Fabricut. It was mighty nice to work with, and will hold up for years until the family is ready for a change of decor. Then, the polyester-content non-woven material is designed to strip off the wall easily and in one piece.

The home is in the Memorial Villages neighborhood of Houston.

Dining Room Is Brightened and Warmed at the Same Time

September 11, 2021
Before. Walls are primed and ready for paper.
After
The homeowner raved about how the wallpaper made the room look so much brighter. And it coordinates so nicely with the color of the woodwork and wainscoting.
Detail. There is a slight raised-ink feel.
Using my laser level to get the first strip plumb, and the motifs centered vertically between the windows.
The pattern name “Kashmira” reflects the slight ethnic feel of this pattern. The manufacturer is Baker Lifestyle, in their Echo Collection.

Here’s a dining room in the Woodland Heights neighborhood of Houston that feels both cheerful and snug at the same time.

The material was “non-woven” and could be hung using the paste-the-wall method. However, I prefer the flexibility and accuracy that comes with pasting the paper.

The interior designer is Stacie Cokinos of Cokinos Design, who works mostly in the Heights area of Houston.

Preventing White From Showing At The Seams

July 8, 2021
Chalk pastels for coloring the edges of the wallpaper. (Do NOT use oil pastels – they stain wallpaper.)
Craft paint from the hobby store used to stripe the wall where the wallpaper seams will fall. Note the red vertical line from my laser level, which serves as a guide. I use a small square of dampened sponge to wipe on the paint. Be sure to let it dry before hanging the paper.

Manufacturers have a bad habit of printing dark wallpapers on white substrates. Since wallpaper expands when it gets wet with paste, and then shrinks as it dries, you have the potential for the white edges of the paper showing at the seams. There is also the possibility that the white wall behind the paper will be exposed, too.

To minimize these chances, I use chalk pastels to color the edges of the wallpaper, and diluted craft paint to stripe under where the seams will fall.