How to Hang Wallpaper

The two cross-link and never absorb each other. Written for the person doing the job.

Job: hang new wallcovering — planned, cut, pasted, plumb, smoothed, seamed, and trimmed — on a prepared wall.

Difficulty: the skilled half of wallpaper work. Removal is patience; hanging is precision. The first strip and the first seam are the entire learning curve.

Before you start: read the roll, read the room

Identify the material class — from the label, not from habit. Everything downstream branches here. Unpasted stock takes paste on the strip and then books (Step 7). Pre-pasted stock activates in a water tray. Paste-the-wall (most modern non-wovens) takes paste on the wall and hangs dry off the roll — no booking, no expansion to manage, which is why non-wovens are the beginner's honest friend. The label also names the match (straight, drop, or free), the repeat distance, and the hang direction — and on plain textures it may call for reverse-hanging alternate strips to defeat shading. Wherever this guide and the label disagree, the label wins; the manufacturer knows their paste chemistry and nobody else does.

Check every roll's batch (dye-lot) number. Rolls printed in different runs differ slightly in color, and a half-shade difference invisible in the hand is a stripe on the wall. All one batch, or plan which wall the odd roll gets.

Count your drops honestly. A drop is wall height plus about 4" of trim allowance — 2" lapping the ceiling, 2" the base. With a straight or drop match, round each drop UP to a whole number of repeats: that rounding is the waste the pattern costs you, and on a big repeat it is real money. Divide the roll's printed length by the rounded drop for strips-per-roll, count the room's drops wall by wall, and buy one roll beyond the math — a hanging error costs a strip, but a re-order costs a batch match.

Plan the seams while everything is dry. Start against a plumb line beside the least-lit corner — behind or above the entry door is classic — and work the room in one direction. The final seam, the kill point, is where the pattern will not meet itself; park it in the shortest, least-seen run. On a focal wall (chimney breast, the wall you see first), do the opposite: center the pattern and work outward both ways. Now walk the plan: any seam landing on an outlet, or a sliver-width strip dying into a corner, gets re-planned by shifting the start line a few inches — decided dry, not discovered wet.

Kill the power to the room's outlets and switches at the panel, and take the cover plates off. You will be trimming paste-soaked paper into those openings with a razor blade. Same rule, same reason, same step-one placement as the removal guide.

The hand-off: this guide starts on a finished wall

Hanging is the last trade to touch the wall, and it inherits every sin. If old paper is still up, that is the sister guide — strip-wallpaper, the removal exemplar — and it ends exactly where this one begins: repaired, washed, primed. If the wall is scarred or lumpy, that is the skim-coat-a-wall guide, and be warned that paper *telegraphs*: under raking light a papered wall shows every dip a painted one does, plus a peak at any seam that crosses unflat substrate. On the day this guide begins the wall is stripped, repaired, sealed with a wallcovering primer-sealer (paste grips it now, and the *next* stripping crew — probably you — gets a release layer instead of a demolition), dust-free, and dry. Hanging over raw drywall face paper is how removals turn into drywall replacement; the store's own removal guide says so and this one repeats it.

Cut and paste

Cut strips dry, at the table (34015). Measure the drop, add the allowance, decide which pattern element you want riding the ceiling line, and cut with the shears in one or two long closing strokes — eleven inches of blade exists to make a 20"-plus strip a one-stroke cut, because every re-entry is a candidate jag. Score the cut line first with the shears' precision tip so springy vinyls and non-wovens don't walk off the mark as the blades close. For a drop match, lay strip 2 against strip 1 on the table and match them edge-to-edge *before* pasting, and pencil-number every strip's back at the top — sequence and which-end-is-up both die in a booking pile otherwise. On a straight match, cutting several drops ahead is efficient; on a big drop match, stay two ahead and keep re-checking.

Paste and book — by class, label first.

Unpasted: strip face-down, paste from the center out and *over* the edges (a starved edge is a curled seam tomorrow — the edges matter more than the field), then book: fold each pasted end gently to the middle, paste-to-paste, edges square, no crease at the folds. Booking keeps the paste open and lets the paper finish its expansion — wet paper grows, and paper that does its growing on the wall instead of in the book makes the bubbles and gapped seams of the what-goes-wrong section. Book every strip the label's stated time, and every strip the *same* time: strips booked differently expand differently and refuse to seam.

Pre-pasted: roll the cut strip loosely, submerge per the label, draw it out, book the same way. (Plenty of professionals brush on a thin coat of activator or dilute paste anyway, for open time and grip — if you do, do it identically on every strip.)

Paste-the-wall: roll paste one strip-width-plus onto the wall and hang dry, straight from the roll or a cut strip. Keep the paste band ahead of you, not the whole room — it skins.

The first strip is the whole job

Strike a plumb line. Measure out from the starting corner one strip-width minus about 1/2" — the sliver that will wrap into the corner behind you — and mark true vertical with the level: light pencil ticks, or a laser line the wall never touches. Never align to the corner itself. No corner in any house is plumb, and every strip that follows references this one; a first strip 1/4" off plumb is a pattern running visibly downhill by the third wall.

Hang it. Carry the booked strip up, unfold the top half, and place it with the allowance lapping the ceiling and the strip's edge *kissing* the pencil line, not crossing it. Slide it — wet paste is a bearing surface and the strip floats small distances willingly. When the edge lies dead on the line top to bottom, release the lower fold and let it fall against the wall.

Smooth and set

Set the strip center-out (45807). Smoother down the center spine first, top to bottom, then overlapping strokes outward to each edge on a slight downward diagonal. You are not pressing paper down — you are displacing paste and air, driving a small bow-wave ahead of the blade's contact line, and every stroke must give that wave an escape path to an edge. Chase any bubble to its *nearest* edge, never inward — flattened point-first it becomes a paste void that dries into a blister. Firm enough to move paste, light enough not to stretch the strip or squeeze the bed dry. Wipe squeeze-out off the face the moment it shows at the edges: clean sponge, clean water, blot.

Or set it with the brush (35789). Hand-printed papers, deep embossing, flock, and fragile matte stock punish a hard poly edge — it burnishes, streaks, and crushes relief. The smoothing brush is the same center-out choreography with the pressure distributed across bristles, seating the strip without flattening anything.

Butt every standard seam. Hang the next strip as you hung the first, but its master is now the pattern: match at eye level — where people look — then let top and bottom follow. Float the edge up against the previous strip until the two factory edges kiss: touching full-height, never overlapped, never gapped, no wall showing. Wet strips slide; walk the edge in with flat palms on the field of the strip, not fingertips on the seam.

Roll the seams lightly, at the right moment (30100 / 30160 / 30250). A few minutes after each seam closes — once the paste has begun to tack — run a seam roller down the joint in one or two light passes to marry both edges into the paste bed. These are the roller line's dedicated seam tools, the rollers that never touch paint, and their discipline is the point: a leaned-on seam roller squeezes the joint's paste out (tomorrow's curling edge) and burnishes a shiny stripe down the wall (permanent, visible from the doorway). On embossed or delicate stock don't roll at all — tap the seam closed with the smoothing brush's bristle ends.

Double-cut where butting won't do (31550 + 45810). Thick commercial vinyls, murals, and anything without a trustworthy factory edge get the paperhanger's seam: hang the second strip overlapping the first by an inch with the pattern aligned, seat the 45810's stainless edge down the overlap's center, and cut through both layers in one continuous, firm pass — the freshest blade in the kit, no stops. Peel the top offcut; lift the seam edge gently and draw the bottom offcut out; close and roll. The edges mate perfectly because they are the same cut.

Inside corners get split, not wrapped. Measure from the last strip's edge to the corner at top, middle, and bottom; cut the next strip lengthwise on the table (34015) to the *widest* figure plus about 1/8" of wrap, and hang it into the corner. Then strike a new plumb line on the next wall and hang the leftover width to that line, its cut edge riding into the corner over the little wrap. The corner swallows the overlap and the pattern restarts true. A full strip folded through an out-of-plumb corner creases, bubbles, and exits crooked — and every strip after inherits the lean; this step is where pattern drift is born or killed. One material note: vinyl will not stick to vinyl with ordinary paste, so a vinyl-over-vinyl corner overlap gets a stripe of vinyl-to-vinyl seam adhesive.

Trim at ceiling and base (31550 or 42045, riding a guide). Crease the allowance into the ceiling and base junctions with the 45807's edge so the cut line is defined. Seat the guide in the crease and draw the knife along it in one continuous low-angle pull — slicing, never pushing — then leapfrog the guide, overlap the cut's end an inch, and continue; stopping mid-run is where visible jags live. The 31550 and the 9mm snap-off are siblings on this cut, not rivals: a backed single-edge razor in a rigid quick-change frame (stiffer, a whole fresh edge per change) versus a slim tip with thirteen snap points that steers curves and renews mid-strip. Decorators snap or swap *by schedule, not by feel*, because wet paper's first dullness report is a tear. Peel the offcuts away wet.

Outlets and casings. At every dead outlet box: pierce the paper over the opening's center, cut diagonals out to the four corners (31550), crease the flaps into the box edges, trim each flap against the 45805 Mini — its short blade lives in exactly these placements — and let the plate cover the cut line. At door and window casings: hang the strip over the opening, make a long diagonal relief cut with the shears toward the casing's corner until the strip lies flat in both planes, crease into the casing's profile with the smoother, and trim on the guide. Wipe paste off trim, plates, blades, and guide edges as you go; dried paste is tomorrow's scraping job.

Inspect while it can still be fixed. Raking light, full circuit of the room: a surviving bubble gets chased to an edge while the paste is open; a proud seam gets one more light roller pass; paste haze on the face comes off with clean water and a blot, not a scrub. Then leave the room alone at normal temperature — no heat gun, no space heater aimed at a slow wall. Paste that dries too fast at the seams is how edges lift. And don't judge bubbles at breakfast: small drying bubbles in paper stock commonly pull flat as the paper shrinks back overnight; what survives full cure is what gets fixed.

Bag the offcuts. Trimmed pattern ends, labeled with the batch number, are the future repair kit — a patch cut from the same batch disappears into the wall; one from a fresh order usually doesn't.

What goes wrong (and the fix)

Seams opening as they dry. Starved edges (paste over the edges, always), inconsistent booking (same time, every strip), or a room dried hot. Re-paste a lifted edge with seam adhesive on a small brush, press, roll once, lightly.

Bubbles that survived cure. Missed air, or a paste void made by chasing a bubble inward. Fix without stripping: nick inside a pattern line (or syringe through a pinhole), feed paste in, work flat to the nick.

Pattern drifting off the ceiling line. The house's fault, prevented by method: match at eye level, and re-plumb at every corner (Step 15) so drift never compounds wall to wall. Where a long run must drift, spread the loss across several strips rather than jumping it in one.

A tear in a wet strip. A dull blade or an overworked strip, almost every time. Change edges ruthlessly — and know that wet tears usually close invisibly: fibers mesh; smooth the flap back aligned and roll it. Do not peel a smoothed strip off the wall unless there is no other way — it stretches the moment it leaves, and a stretched strip never seams right again.

The strip went up crooked. While the paste is open you have minutes: peel back to the error, float it over, re-set, re-smooth. Past tack, hang the loss — strip it and cut fresh; see the stretching rule above.

"The paste isn't grabbing." Unsealed or dusty wall, cold room, or a strip booked far past the label. There is no tool on this page that fixes it — the fix lives in the hand-off guides, which is why the hand-off is a section and not a sentence.

The history footnote (because these pages should be worth reading)

The hanging trade is the machine's child. Potters & Ross patented the first wallpaper printing machine in 1839, and British output exploded from about one million rolls in 1834 to nearly nine million by 1860 (V&A — a brief history of wallpaper) — millions of cheap rolls created a profession to hang them. The paperhanger's manual era runs from about 1875 through trade-school texts like A. Ashmun Kelly's *The Expert Paper-Hanger* of 1912 ([R. The butt seam this guide teaches is the luxury factory-trimmed edges made of that job's disappearance. One page, one trade each.

Every linked PDP lists this guide under its applications — the graph runs both directions.