Why is my wallpaper peeling at the seams?
Seams lift when the adhesive loses its grip: too much moisture while the paper was hung, the wrong adhesive or a poorly prepared wall, or damp air and a damp wall afterward. Fix the moisture first, then glue the seam back with seam adhesive. If the wall is soft, stained or smells musty, stop and have it checked.
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By Kasra Taheri, Founder, LoclisPublished
Researched and drafted with AI, then checked claim by claim against the sources listed below before it was published. Prices and rules change; the dates beside each source say when it was last checked.
Step by step
Read when to stop and call a pro, further down this page, before you start.
Step 1: Look for the cause
Check whether the lifting seams are in a bathroom, kitchen or laundry, near a window that fogs, or on an outside wall. A steamy room is the usual suspect.[2]
Step 2: Check the wall behind the seam
Press the wall beside the open seam. If it is soft, stained or smells musty, stop and read the section on when to call a pro.[2]
Step 3: Let it dry
Run the exhaust fan or open a window when showering or cooking, and leave the seam open to air for a day if the paper or wall feels damp.[2]
Step 4: Clean the edges
Lift the loose edge gently and wipe dust and old dried paste off the back of the paper and the wall with a barely damp cloth.
Step 5: Apply seam adhesive sparingly
With a small brush or a toothpick, put a thin line of seam adhesive made for your paper type on the back of the edge. More paste means more moisture, which can slow drying and reopen the seam.[1]
Step 6: Press and wipe
Press the seam flat against the wall and wipe off any squeezed-out adhesive at once with a damp cloth so it does not stain the surface.
Step 7: Roll lightly and hold
Roll the seam once with light pressure, and hold it with low-tack painter's tape for an hour or so if it springs back. Peel the tape off slowly.
The short version
Wallpaper seams peel when the paste behind them stops holding. Three causes cover most cases: the paper was hung with too much moisture or the wrong adhesive, the wall was not prepared properly, or the room stays damp. Find which one you have before you glue anything, because gluing a seam in a wall that is still wet just fails again.
Causes from the day it was hung
Seams that open within days or weeks of installation usually trace back to the hanging. A wallcovering manufacturer's problem guide says edge curl during installation is generally because of improper surface preparation and/or the wrong adhesive being used, or incorrect soaking time.[1] Its advice is to make sure the surface is properly sealed, sanded, dusted and sized and that the appropriate adhesive is being used.[1]
Too much wet paste causes trouble too. The same guide says too much moisture stops adhesion at the seams.[1] A common reflex makes it worse: applying more paste to the seam area adds more moisture, which delays the drying of the seam so it dries last, and that can cause the seam to open during the drying process.[1]
If the paper is new and several seams are lifting, tell the installer. This is usually a workmanship or materials question that belongs with whoever hung it.
Causes that build up over time
Seams that were fine for years and then lift are usually a moisture story. Steam from showers, cooking and laundry keeps paste damp, and damp paste lets go. The EPA's guidance is to keep indoor humidity below 60 percent (ideally between 30 and 50 percent) relative humidity.[2] It also says to run the bathroom fan or open the window when showering.[2]
An outside wall, a wall under a leaking window, or a wall near a plumbing line can also hold moisture. Seams that lift in one patch while the rest of the room is fine point to a local source, not a room-wide humidity problem.
How to re-glue a seam
This works for one or two lifting seams in sound, flexible paper over a dry wall. A wallpaper seam adhesive and a small brush or toothpick are the only supplies you need, plus a damp cloth and, if you have one, a seam roller.
Before you reach for the adhesive, press the wall beside the open seam. A dry, firm wall is the green light. Fix the humidity first by running the fan, opening a window, or moving a humidifier out of the room, and give the seam a day to air if it felt damp.
Clean the back of the paper and the wall edge of dust and dried paste with a barely damp cloth. Then use a thin line of adhesive made for your paper type, not a thick bead. Press the seam flat, wipe any squeezed-out adhesive at once, and roll it once, lightly. If it springs back, hold it with low-tack painter's tape for an hour or so and peel the tape off slowly.
Stop and call a pro if
- The wall behind the seam is soft, stained or musty. The EPA says mold may be hidden in places such as the back side of dry wall, wallpaper, or paneling.[2] The EPA warns that removal of wallpaper can lead to a massive release of spores if there is mold growing on the underside of the paper,[2] so do not strip it back to look.
- You suspect hidden mold. The EPA says if you believe that you may have a hidden mold problem, consider hiring an experienced professional.[2]
- A leak is the cause. Seams lifting under a window, below a bathroom or along a pipe wall mean fixing the water source first, which is a plumber's or roofer's job.
- Many seams are lifting, or the paper is brittle. That is a failed installation or a wall problem, not a seam repair.
Getting help in Virginia
Once the wall is sound, repairing or re-hanging paper is painter's work. Read how to remove old wallpaper if the paper has to come down, what removal costs in Virginia, and whether to hire someone to hang wallpaper. More are in painting answers, and you can browse painters on Loclis.
When you would rather hand it off, describe the wall and local painters will quote it.
Common questions
- Why do wallpaper seams peel in a bathroom?
- Steam and humidity keep the paste damp. The EPA advises keeping indoor humidity below 60 percent, ideally between 30 and 50 percent, and running the bathroom fan or opening a window when showering. A seam that keeps lifting in a steamy room usually needs better ventilation before any glue will hold.
- Can I just use regular white glue or a glue stick on a lifting seam?
- It is better not to. A wallcovering maker's guidance is that the appropriate adhesive has to be used for the paper, so check the label or the paper's instructions before gluing.
- Should I add more paste and roll the seam hard?
- No. A wallcovering maker warns that too much moisture stops adhesion at the seams, and that extra paste adds moisture, delays drying and can cause the seam to open as it dries. Use a thin line of adhesive and light pressure.
- Is peeling at the seams a sign of mold?
- Not by itself, but the EPA notes that mold may be hidden behind wallpaper. If the wall is stained, soft or smells musty, do not keep peeling the paper back; the EPA says to consider hiring an experienced professional.
- When is it better to replace the paper than repair the seam?
- When many seams are lifting, the paper is brittle or torn, or the wall behind it is damaged. Re-gluing one or two seams on sound paper over a dry wall is a reasonable repair; a whole wall of failing seams usually means the cause has not been fixed.
Sources
- [1] Wallpaper problem solver: curling edges, lifting joins, Resene Paints (paint and wallcovering manufacturer). Checked October 28, 2026.
- [2] A Brief Guide to Mold, Moisture and Your Home, U.S. Environmental Protection Agency. Checked October 28, 2026.
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