How to strip wallpaper glue
To strip wallpaper glue, prepare the surface by scoring the wallpaper, then apply a solution of hot water and stripper or vinegar. Scrape off the softened glue, rinse the walls, and allow them to dry completely before proceeding with painting or new wallpaper.
Removing wallpaper glue is often the most tedious part of a wallpaper removal project. Unlike the wallpaper itself, which might peel off in large sheets, the adhesive underneath can cling stubbornly to your drywall. Failing to remove it thoroughly will lead to peeling paint, bubbling new wallpaper, or an uneven finish. Fortunately, with the right approach and tools, you can tackle this job effectively.
Before you begin, gather your supplies. You’ll need a scoring tool (like a paper tiger or a utility knife), a putty knife or scraper (a flexible plastic one is best for drywall to avoid gouging), a spray bottle, warm water, a mild dish soap or a commercial wallpaper stripper, sponges, clean rags, and possibly a bucket. For tougher spots, white vinegar can be a helpful addition to your water mixture. Ensure you have drop cloths to protect your floors and baseboards.
Score the wallpaper residue
The first step is to ensure any remaining wallpaper or paste is porous enough to absorb your cleaning solution. If you’ve already removed the wallpaper and are left with just the glue, you might skip this if the glue is already soft. However, if the glue is dried and hardened, or if there are still small pieces of paper clinging to it, scoring is crucial. Use a scoring tool to create small perforations across the entire glued surface. Be gentle; you’re aiming to break the surface tension of the glue and any paper, not to cut into the drywall itself. Over-scoring can damage the paper facing of the drywall, leading to a much more labor-intensive repair later.
Apply a wallpaper glue remover solution
Mix your chosen solution in the spray bottle. A common and effective mixture is one part white vinegar to two parts hot water. Alternatively, you can use a few drops of mild dish soap in hot water, or a commercial wallpaper stripper mixed according to the manufacturer’s instructions. Hot water is key, as it helps to soften the adhesive more effectively. Avoid using overly harsh chemicals unless specifically designed for wallpaper glue, as they can damage drywall or be unpleasant to work with.
Generously spray the solution onto the scored wallpaper residue or directly onto the glue. Don’t be shy; the goal is to saturate the area. Allow the solution to sit for at least 10-15 minutes. You should see the glue start to soften and become gooey. If it starts to dry out, spray it again. For stubborn areas, you might need to let the solution penetrate for longer, reapplying as needed.
Scrape away the softened glue
Once the glue has softened, it’s time to scrape. Use your putty knife or scraper at a low angle (around 30 degrees) to avoid digging into the drywall. Work in small, overlapping strokes. The softened glue should come off relatively easily in gummy strips. If you encounter resistance, the glue isn’t wet enough. Reapply your solution and let it sit longer before trying to scrape again. It’s better to re-wet and re-scrape than to force the scraper, which can easily damage the drywall surface. Take your time; this step requires patience.
Rinse the walls thoroughly
After scraping, there will likely be a thin film of dissolved glue residue remaining. This is critical to remove, as it will interfere with paint adhesion. Dampen a clean sponge or rag with plain warm water (you can add a tiny bit of dish soap if you used a lot of vinegar earlier, but rinse well afterward). Wipe down the entire wall surface, rinsing your sponge or rag frequently in a clean bucket of water. You’re essentially washing the walls to remove any lingering adhesive. Pay attention to corners and edges where glue tends to accumulate.
Allow walls to dry completely
Once the walls are rinsed, allow them to air dry completely. This might take several hours, depending on humidity and airflow. You can speed up the process with fans or by opening windows. Do not attempt to paint or apply new wallpaper until the walls are bone dry. You can test for dryness by pressing a dry hand against the surface; if any tackiness or moisture transfers, it’s not ready.
Inspect and repeat if necessary
After drying, carefully inspect the walls in good light. Look for any remaining shiny spots or areas that feel slightly tacky. If you find any, repeat the process of scoring (if needed), applying the remover solution, scraping, and rinsing on those specific areas. It’s much easier to do touch-ups now than after you’ve invested time in painting.
Common Mistakes When Stripping Wallpaper Glue
| Step or Tool | Typical Mistake |
|---|---|
| Scoring Tool | Scoring too deeply, damaging the drywall paper. |
| Solution Application | Not applying enough solution, or letting it dry out before scraping. |
| Scraping | Using a metal scraper at too steep an angle, gouging the drywall. |
| Rinsing | Skipping the rinsing step, leaving adhesive residue that affects paint. |
FAQ
Can I just paint over wallpaper glue?
No, you should not paint over wallpaper glue. Even a thin, unseen layer of adhesive can cause paint to peel, bubble, or adhere unevenly. Thorough removal is essential for a professional finish.
What’s the best way to remove glue from textured wallpaper?
For textured wallpaper, scoring is even more critical to allow the solution to penetrate the texture. Use a fine-grit scoring tool and be patient. You might need multiple applications of the remover solution before scraping.
How long does it take to strip wallpaper glue?
The time it takes varies greatly depending on the type of glue, how long it’s been on the wall, and the size of the area. It can range from a few hours for a small patch to several days for an entire room, especially if multiple applications are needed.
Is there a difference between old and new wallpaper glue?
Yes, older glues might be more brittle or more water-resistant, potentially requiring longer soaking times or stronger solutions. Modern adhesives are often formulated for easier removal, but thoroughness is always key.