Bubbles under the paper, mismatched patterns at the seams, a strip that starts lifting off the wall after a week. If you’ve searched wallpaper hanging how to because your first attempt went wrong, or you’re trying to avoid that mess altogether, you’re in the right spot. This guide walks through hanging wallpaper the way a professional decorator would, not the way most YouTube shortcuts suggest.
So, is hanging wallpaper difficult? Not if you follow the right order of steps. We’ll cover wall preparation, cutting your drops to size, working out where to start in the room, applying paste correctly, and smoothing out air bubbles before they set. These are the exact wallpaper hanging tips we rely on for jobs across Dublin homes, adjusted for someone doing this for the first time without a team behind them.
By the end, you’ll have a clear, room-by-room process you can actually follow, from measuring and cutting through to trimming the final edges. If your walls are tricky, your pattern is large, or the job feels bigger than a weekend project, that’s exactly when it makes sense to bring in help instead of risking a costly redo.
What you need before you start hanging wallpaper
Gathering the right kit before you open a roll saves you from the classic beginner mistake: mixing paste halfway through a strip because you ran out, or realizing your only blade is blunt after three cuts. A proper wallpaper installation needs specific tools, not whatever you happen to have in the shed, and skipping this step is where most first attempts start going wrong.
Start with the essentials. You’ll need a pasting table (or any flat surface longer than your longest drop), a wallpaper brush or roller for spreading paste evenly, a smoothing brush or plastic smoother to push out air, a seam roller for the joins, a sharp trimming knife with spare blades, a straight edge or metal ruler, a tape measure, a spirit level or plumb line, a bucket for mixing paste, and a sponge for wiping off excess. Dust sheets protect your floor, and a step ladder gets you to the top of the wall without stretching and misaligning the paper.
The right tools don’t make the job easier, they make the mistakes avoidable.
Choosing your paste and paper
Paste type depends on the wallpaper you’ve bought, and using the wrong one is a common reason paper lifts off the wall within weeks. Most standard papers need a ready-mixed or powder paste, while heavier vinyls or textured papers often need a stronger, high-tack formula.
| Wallpaper type | Recommended paste | Notes |
|---|---|---|
| Standard paper (lightweight) | Cellulose paste (powder mix) | Cheapest, easy to work with |
| Vinyl or washable | Ready-mixed vinyl adhesive | Higher tack, resists moisture |
| Heavy textured or fabric-backed | Heavy-duty paste | Check manufacturer’s specific guidance |
| Paste-the-wall paper | Paste-the-wall adhesive | Applied to wall, not paper |
Check the label on your roll. Manufacturers print the exact paste recommendation right there, and ignoring it is how strips end up sagging or bubbling later.
How much wallpaper to buy
Rooms rarely need a neat number of rolls, so measure carefully and round up rather than down. A standard roll covers roughly 5 square meters, but pattern repeats eat into that coverage.
- Measure the height and width of each wall
- Add 10cm to each drop for trimming
- Buy an extra roll for large-pattern repeats or mistakes
- Check the batch number matches across all rolls to avoid color variation
Step 1. Prepare and prime the wall
Walls that look fine at a glance often hide the small flaws that ruin a wallpaper job later. Before anything else, strip off old wallpaper, sand down flaking paint, and fill every crack or nail hole with a proper filler. Run your hand across the surface once it’s dry. If you can feel a bump or dip, your smoothing brush will find it too, and it’ll show through the finished paper as a shadow or seam that won’t sit flat.
Once the surface is smooth, wash it down with sugar soap to remove grease, dust, and any residue from old adhesive. Let it dry fully before moving on. Skipping this step is one of the fastest ways to end up with paper that won’t stick properly, no matter how good your paste is.
A wall that’s smooth, clean, and sealed is half the job done before you’ve even cut a strip.
Why priming matters more than people think
Plasterboard and freshly plastered walls soak up paste like a sponge, pulling moisture out of the adhesive before it’s had a chance to bond. That’s why size or a diluted paste coat, sometimes called a wall primer for wallpaper, makes such a difference. It seals the surface, slows down absorption, and gives you more time to slide and align strips before the paste grabs.
Skip this on porous walls and you’ll notice the paper drying unevenly, edges lifting within days, or patches where the paste has dried patchy under the paper. A coat of primer takes twenty minutes. Redoing a wall takes a weekend.
Step 2. Measure, mark and cut your wallpaper
Getting your measuring and cutting right sets up every strip that follows, so slow down here even if you’re itching to get pasting. Measure the height of your wall from skirting to ceiling, then add 10cm at the top and 10cm at the bottom for trimming slack. Cut your first strip to that length, then hold it against the wall before committing scissors to the rest of the roll.
When it comes to how to fold wallpaper for hanging, most decorators use a technique called booking. Paste the strip, then fold the pasted sides together without creasing the fold itself, top edge to about two-thirds down, bottom edge up to meet it. Leave it to rest for the time stated on the label, usually five to ten minutes. This lets the paper relax and expand evenly, so it doesn’t stretch or shift once it’s on the wall.
Cut once, measure twice, and let the paper rest before it ever touches the wall.
Matching the pattern before you cut
Large or complex patterns need extra care at this stage. Unroll two lengths side by side and check the repeat lines up before you cut either one.
- Lay the first cut strip flat and match the second roll’s pattern against it
- Mark your cut line with a pencil, not a guess
- Number each strip on the back edge in the order you’ll hang it
- Cut a couple of spare strips if the pattern repeat is over 50cm, mistakes cost less than a mismatched wall
Step 3. Paste the wall and hang your first strip
When hanging wallpaper, where do you start matters more than most beginners realize. Never start in a corner, since walls are rarely perfectly straight and a crooked first strip throws off every pattern match after it. Instead, measure out from a focal point, usually the wall you’ll see first when entering the room, or a chimney breast if you have one. Draw a plumb line from ceiling to floor using a spirit level, and use that line as your true vertical guide for the first strip.
Your first strip sets the line for the entire room, so get it plumb before you paste anything else.
Applying the paste and hanging with confidence
For hanging wallpaper with paste, load your brush or roller evenly, working from the center of the strip outward to avoid dry patches at the edges. If you’re using a paste-the-wall product, apply the paste directly to the plaster instead, working in sections slightly wider than one drop.
- Unfold the top half of your booked strip and position it against the plumb line
- Smooth from the center outward with a brush, pushing air toward the edges
- Unfold the bottom half and repeat the smoothing motion
- Run a seam roller lightly along any joins once the strip sits flat
Don’t rush the smoothing stage. Bubbles left now are far harder to fix once the paste has set.
Step 4. Hang the rest, trim and finish around obstacles
Work your way across the wall, butting each new strip against the last without overlapping, and check the pattern lines up before you smooth it flat. Keep matching against your plumb line every second or third strip, since even a tiny drift compounds fast across a full wall. Wipe excess paste off the ceiling and skirting edges with a damp sponge as you go, rather than leaving it to dry and smear later.
A wall goes wrong one small drift at a time, so recheck your line every few strips, not just at the start.
Trimming clean edges
Trimming makes the difference between a job that looks hung by a professional and one that looks rushed. Press the paper into the join between wall and ceiling with your smoothing brush, then run a sharp blade along that crease using a straight edge as your guide. Change blades often since a dull one drags and tears rather than slicing cleanly.
Working around sockets, switches and corners
Switches and corners trip up most beginners, so slow down here.
- Turn off the power, then cut diagonal slits over the socket and trim around the plate
- For corners, never wrap paper more than 2cm around; cut and overlap a fresh piece instead
- Around window and door frames, cut close, then smooth with the brush before trimming excess
Getting these details right is what separates a tidy finish from one that draws the eye to every flaw.
Living with your newly wallpapered wall
Once the final strip is trimmed and the paste has dried, avoid the urge to open windows for a quick breeze. Let the wall cure for at least 24 hours before switching on heating or letting draughts hit it, since rapid drying pulls seams apart before the adhesive has fully set. Check back after a day or two for any edges that lift, pressing them down with a little extra paste on a fine brush before they curl further.
Following this process step by step is what separates a wall that looks professionally hung from one with visible seams and bubbles. Hanging wallpaper rewards patience more than skill, but large patterns, tall stairwells, or a room full of awkward corners can still turn a weekend job into a costly mistake. If that sounds like your project, get in touch with Alex Trend Painters for a free quote and let our experienced team handle the walls that matter most.