Getting to Know Wallpaper-Removal Techniques

New wallcovering can transform a room, going from boring to beautiful. But before you can determine the best approach to removing wallpaper, you need to know the type of wallcovering and the type of wall surface that's under the wallpaper.

Knowing what you're up against

In most cases, walls are either drywall (gypsum sandwiched between layers of paper) or plaster smoothed over lath (either strips of wood or metal mesh). You can usually tell what you have by the feel (plaster is harder, colder, and smoother than drywall) or by tapping on it (drywall sounds hollow, and plaster doesn't). When in doubt, remove an outlet cover to see the exposed edges.

Drywall is more vulnerable to water damage; you must avoid overwetting it. And use care when you're scraping because drywall gouges more easily than plaster.

What about the wallpaper? Be optimistic — assume that the paper is dry-strippable. Lift a corner of the paper from the wall with a putty knife. Grasp the paper with both hands and slowly attempt to peel it back at a very low angle. If it all peels off, you're home free.

If the wallpaper doesn't peel off, or if only the decorative surface layer peels off, you must saturate the wallpaper or the remaining backing with water and wallpaper remover solvent and then scrape it off.

Some papers, such as foils or those coated with a vinyl or acrylic finish, are not porous. If you're removing such wallpapers, you must scratch, perforate, or roughen the entire surface to permit the solution to penetrate below the nonporous surface to the adhesive. You can test for porosity by spraying a small area with hot water and wallpaper remover. If the paper is porous, you should see the paper absorb the water immediately. After the paper is wetted, you can scrape it off.

Now that you know what you're dealing with, you can choose an appropriate removal technique for the entire surface. Depending on your situation, choose one of three wallpaper-removal approaches: dry-stripping, wallpaper remover, or steam.

Choosing a removal technique

The technique you use for removing the old wallpaper depends on what kind of paper you're taking down and what kind of surface is underneath (see the previous section, "Knowing what you're up against"). The following sections outline the steps involved in the different approaches.

Dry-stripping

If a wallpaper is dry-strippable, you just need to loosen each strip at the corners with a putty knife and slowly peel it back at a 10- to 15-degree angle.

Don't pull the wallpaper straight out or you may damage the underlying surface, especially if it's drywall.

After you remove all the paper, follow the adhesive removal procedures the next section describes. If only the top, decorative layer peels off, leaving a paper backing behind, it's a peelable paper. Dry-strip the entire top layer and then follow the steps in the next section to take off the backing and adhesive.

If you plan to repaper and the old backing is secure and in good condition, you may be able to hang the new wallcovering right on top of it. Discuss this option with your wallpaper dealer.

Soaking and scraping it off

To remove nonstrippable paper or any paper backing that remains after dry-stripping a peelable paper's decorative layer, turn first to warm water and wallpaper removal solvent. Soak the surface with a wallpaper remover solution. Although a spray bottle works, the most effective way to get the solution on the wall and not all over the floor is to use a paint roller or a spray bottle. Then scrape the sodden paper off with a wide taping knife or a wallpaper scraper.

Don't wet a larger area than you can scrape off within about 15 minutes. You shouldn't let water soak into drywall for longer than that, or it may cause unnecessary damage. Usually, you can wet about a 3-foot-wide, floor-to-ceiling section at a time.

Scrape off the wet wallpaper and let it fall to the floor. The canvas drop cloth or towels that you put down absorbs most of the dripping solution and keeps your shoe soles a little cleaner.

If the wallpaper is nonporous, you must roughen or perforate the surface so that the remover solution can penetrate and dissolve the adhesive. To roughen the surface, use coarse sandpaper on either a pad sander or a hand-sanding block. You can also use a neat gizmo called a Paper Tiger or another perforating tool devised for use on wallpaper applied over drywall. Rounded edges on these tools help ensure that you don't cause damage that may require subsequent repair. Don't use the scraper after the wallpaper is wet, though; you may damage the drywall.

If you're successful in using the soak-and-scrape approach, you can finish up the job. If not, it's time to pull out the big gun: a wallpaper steamer.

Giving it a steam bath

You're talking major work if you must remove more than one layer of wall-paper or remove wallpaper that has been painted over. And if the wallpaper was not applied to a properly sealed surface, removing it without damaging the wall can be next to impossible. For these tough jobs, you may have to rent a wallpaper steamer (about $15 for a half-day) or buy a do-it-yourself model (about $50). A wallpaper steamer is a hotplate attached to a hose extending from a hot water reservoir that heats the water and directs steam to the hotplate.

Although you can use a steamer and wallpaper scraper with relative confidence on plaster walls, use caution on drywall, which is much more vulnerable to water damage and is more easily gouged.

Fill the steamer with water and let it heat up, and keep a baking pan handy to put the hotplate in when you're not using it. Starting at the top of the wall, hold the hotplate against the wall in one area until the wallpaper softens. Move the hotplate to an adjacent area as you scrape the softened wallpaper with a wallpaper razor scraper and let it fall onto the plastic as described in the preceding section. When you're through scraping one area, the steamer usually has softened the next area, depending on the porosity of the paper.

Both steam and the water that condenses from it can drip off the hotplate and burn you. To prevent hot water from dripping down your arm, stand on a stepstool when you're working above chest height. Wear rubber gloves and a long-sleeved shirt, too.

Comments (20)

  1. Posted by Cathy
    I am trying to remove old wallpaper that has been painted over..any ideas?
  2. Posted by Sam
    I am removing wallpaper in my daughters room. I am scoring the paper, spraying it with a mixture of fabric softener(recommemned by Queen of clean) and water, using a steam sprayer and itWORKS!!!!! Good luck!!
  3. Posted by Linda
    If you are going to paint the walls the sticky residue left after you scrape off the paper backing has to be removed. I have just removed 20+ year old wall paper from plaster. It came off as described, then I used a series of 4 wet sponges one at a time per section until removed, then rinse the glue out of them. You won't have to get off the ladder as often, as you can't use a bucket cause the water will be sticky.
  4. Posted by Dave Phillips
    Excellent advice espeially for plasterboard walls.
  5. Posted by Nanette
    To paint after paper removal on plaster walls, must the area be painted with a sealer?
  6. Posted by Rosalie
    Just peeled my wallpaper off my bathroom wall with no problem, but it left a fuzzy surface on the wall & I wish to paint it now. Can I just paint a sealer over it and then paint it?
  7. Posted by Tom Grueser
    What is the best way to protect a carpeted floor when steaming off wallpaper?
  8. Posted by Stephen D. Fink
    Cathy, have you considered moving??
  9. Posted by monica mcwatt
    Just peeled my wallpaper off my bathroom wall with no problem, but it left a fuzzy surface on the wall & I wish to paint it now. Can I just paint a sealer over it and then paint it? Please help!! Please hurry!!!!
  10. Posted by Jeanie
    I would like to know your answer tonumber 9 question. Thanks
  11. Posted by Cindi
    I removed wallpaper that I found out was put on over unfinished drywall-it tore the first layer or two of paper off! How can I repair the drywall and then paint it? Please help!
  12. Posted by Christina
    Monica, I think that fuzzy stuff is part of the backing of the wallpaper, as well as the glue. You need to take that off before painting. It will show through the primer or sealer. Someone here explained how she did that.
  13. Posted by Helen
    I'm removing 30 yr old wallpaper from plastered walls. Some peels off, but a lot still sticks on. Can I spray with fabric softner as mentioned above and then re-paper the walls? Do I have to remove the glue before Re-papering? Thanks, Helen
  14. Posted by Ruth
    What worked well with old wallpaper on drywall that was painted over about 4 years ago...was getting a spray bottle fill with warm water and fabric softner and shake well. This softens the wallpaper right off then continue to peel off.
  15. Posted by Becky Brown
    Please help. I am like Cindi, and removing wall paper over drywall that was not prpared properly and the drywall in many areas is damaged. What do I do, before trying to paint? Please help as big gouges and bare wall are showing and old paint is peeling. I appreciate any advise. Becky
  16. Posted by Donna Schwieder
    We are trying to remove 30-year-old wallpaper off of wood paneling. Any suggestions? So far we are using Pirana gel, but the paper comes off in little pieces even after soaking 2-3 times. Quite tedius.
  17. Posted by Handy Man
    For your 30-yr-old paper removal from wood panelling, keep trying different removal solutions/prods, money permitting, until you find the one that works best. I am in the process of doing so. Currently I am brushing on the "remover liquid", then using a razor blade & "cutting/pushing" with short strokes, between the paper & the panel & it is separating very cleanly, but as you say, slowly & tediously. However I do not pull off strips or layers of the paper; I take the entire thickness of the paper off with this procedure. Works well but slowly. Hope this helps.
  18. Posted by wendy
    thanks
  19. Posted by christina
    i am removing 30+ year old foil wallpaper (1960's) from my bathroom. The walls are made of plaster not drywall. After peeling the wallpaper off, I have found either a canvas or string like backing on the wall. What is the best way to remove this backing? Before painting the bathroom walls, do I need to apply something first?
  20. Posted by Lynn Luther
    I had the very same problem with my wall being covered with a fuzzy coating,after removing the wall paper. fabric softener and water in a spray bottle, took it off like magic, after a short soak. Underneath was, i think, wall sizing. I can't get that off, and that is what i was trying to find advice for on this site. I have heard that a oil base primer has to be used. I am going to try some of the suggestions I found here first

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