The complete guide
Can You Wallpaper Over Paint or Existing Wallpaper?
Applying wallpaper is a transformative design choice, but can you hang it directly over a painted wall or existing wallpaper? The short answer is yes for paint and no for wallpaper. Here is what you need to know to get it right.
The short version
- Yes, you can wallpaper over paint, but only if the wall is properly prepared. The surface must be clean, smooth, and sealed with a suitable primer.
- Wallpapering over existing wallpaper is not recommended. The weight of the new paper and paste can cause the old layer to peel, bubble, and fail.
- Proper wall preparation is the most critical step for a lasting, professional-looking result, regardless of the surface you are covering.
- Freshly painted walls must be left to cure for at least three to four weeks before any wallpaper can be applied to prevent adhesive failure.
- For the best and most reliable outcome, always remove old wallpaper completely before hanging a new wall mural or wallpaper.
Yes, you can wallpaper over paint, provided the painted surface is in good condition: clean, dry, and smooth. However, wallpapering directly over existing wallpaper is strongly discouraged. In both scenarios, meticulous wall preparation, including the crucial step of priming, is essential to ensure your new wallpaper adheres correctly and provides a beautiful, lasting finish.
Can You Wallpaper Over Paint? The Definitive Answer
You can absolutely apply wallpaper to a painted wall, and it is a very common starting point for redecoration. Success, however, is entirely dependent on the condition of the paint and the preparation you undertake. An unprepared painted surface can cause wallpaper adhesion to fail, leading to peeling corners and unsightly bubbles. The goal is to create a stable, uniform surface that the wallpaper paste can grip onto effectively.
The type of paint finish on the wall is a significant factor. Matte or eggshell finishes are more porous and offer a better natural grip for wallpaper paste. In contrast, silk, satin, or gloss finishes are less porous and much smoother, which can prevent the adhesive from bonding securely. These shinier surfaces must be lightly sanded to create a 'key', a slightly roughened texture that allows the primer and paste to adhere properly. Ignoring this step is a frequent cause of wallpaper failure.
Regardless of the paint finish, every painted wall should be primed before wallpapering. A primer serves several vital functions: it seals the paint, preventing the moisture from the wallpaper paste from soaking into the wall and causing the paint to bubble. It also creates an evenly absorbent surface, ensuring the paste dries uniformly. Finally, a properly primed wall will make removing the wallpaper much easier in the future, protecting your walls from damage. For a detailed walkthrough of every step, consult our guide on how to prepare a wall for wallpaper.
How to Prepare a Painted Wall for Wallpapering
Proper preparation is more than half the battle when it comes to achieving a professional wallpaper finish. Rushing this stage will inevitably show in the final result. Follow these steps methodically for a flawless foundation.
Step 1: Inspect and Clean the Wall
Begin with a thorough inspection of the entire wall surface. Look for any signs of damage such as cracks, dents, or holes. Check for any flaking or peeling paint, which must be scraped off completely. Once you have assessed the physical condition, the wall must be cleaned. Over time, walls accumulate a thin layer of dust, grease, and grime, especially in kitchens and high-traffic areas. This layer will prevent wallpaper adhesive from bonding. Clean the wall from top to bottom with a mild detergent solution or a sugar soap solution, then rinse with a clean, damp sponge and allow it to dry completely. This can take up to 24 hours.
Step 2: Repair Imperfections
Any imperfections on the wall surface will show through your new wallpaper, especially with solid colours or subtle designs like a Grey Stripe Mural. Fill any holes, cracks, or deep scratches with a good quality decorators' filler. Apply the filler with a putty knife, pressing it firmly into the imperfection and leaving it slightly proud of the surface. Once the filler is completely dry (check the manufacturer's instructions), sand it down with fine-grit sandpaper until it is perfectly flush and smooth with the rest of the wall. Wipe away all sanding dust with a slightly damp cloth.
Step 3: Sand Glossy or Satin Surfaces
If your walls have a silk, satin, or gloss paint finish, you must de-gloss the surface. These finishes are designed to be non-porous and easy to clean, which also means they are difficult for primers and adhesives to stick to. Using a medium-grit sandpaper (around 120-grit), lightly sand the entire surface of the wall. You do not need to remove the paint, only to dull the sheen and create a fine-textured surface for the primer to grip. After sanding, wipe the wall down again to remove all dust.
Step 4: Prime the Wall
Priming is a non-negotiable step. Applying a wallpaper primer (often called 'sizing') seals the wall and creates the ideal surface for adhesion. It prevents the paste from being absorbed too quickly into the drywall or old paint, giving you more 'slip' time to position each panel correctly. It also acts as a protective barrier, making future wallpaper removal a much simpler task. Apply a single, even coat of a quality acrylic wallpaper primer using a roller and allow it to dry completely according to the product's instructions.
Murals made to your measure
Grey Swallow Animal MuralPrinted to your wall size
Blue Crane Animal MuralPrinted to your wall size
Terracotta Arch Abstract MuralPrinted to your wall size
What Happens If You Wallpaper a Freshly Painted Wall?
It is crucial to understand that 'dry' paint is not the same as 'cured' paint. Paint may feel dry to the touch within a few hours, but it takes much longer to cure fully. Curing is a chemical process where the paint's solvents evaporate and it hardens to its final, durable state. Applying wallpaper over paint that has not fully cured can lead to significant problems. Casavono recommends waiting a minimum of three to four weeks for freshly painted walls to cure before hanging any wallpaper.
If you apply wallpaper prematurely, the moisture from the wallpaper paste becomes trapped against the uncured paint. This moisture interferes with the curing process and can cause the paint to soften and lose its bond with the wall. As the wallpaper dries and shrinks slightly (a natural part of the process), it will pull this weakened paint layer away from the wall, resulting in extensive bubbling and peeling. In the worst-case scenario, the wallpaper will fail to adhere at all or will fall off the wall within a few days or weeks.
Furthermore, wallpapering over uncured paint can cause long-term damage to the wall itself. When you eventually decide to remove the wallpaper, it will likely peel off the uncured paint and even the top layer of the drywall paper, requiring extensive and costly repairs. Patience is key. Allowing the full curing time is an essential part of the wallpaper installation process and ensures the investment in your beautiful new mural is not wasted.
Can You Wallpaper Over Wallpaper?
The short answer is that you should not wallpaper over existing wallpaper. While it might seem like a tempting shortcut, this approach introduces significant risks that can compromise the final result. The potential for a poor finish and complete failure is extremely high. The primary issue is adhesion. You are relying on the original wallpaper's bond to the wall, which is an unknown variable. The added weight of the new wallpaper, combined with the moisture from the new layer of paste, can weaken the old adhesive, causing both layers to bubble, lift, or even peel off the wall completely.
Another significant problem is surface imperfections. The seams of the old wallpaper will almost certainly create ridges that show through the new layer, disrupting the smooth finish. If the existing wallpaper has any kind of texture, embossing, or a vinyl coating, these surface characteristics will also be visible. For a made to measure mural, where a single continuous image flows across the wall, a visible seam from an old paper underneath could ruin the entire artistic effect of a design like the Blush Art Deco Mural.
Moisture from the new paste can also cause the inks in the old wallpaper to bleed through, potentially staining your new, lighter-coloured wallpaper. Ultimately, the time you think you are saving by not stripping the old paper is often lost when you have to fix the resulting problems or, in the worst case, strip both layers and start again from scratch. The most reliable path to a beautiful, long-lasting result is to always remove the old wallpaper first. Our guide on how to hang a wall mural always begins with a properly prepared, bare surface.
When Might It Be Possible to Wallpaper Over Old Wallpaper?
Although it is strongly discouraged, there is a very narrow set of circumstances where you might consider wallpapering over an existing layer. This should be seen as a last resort, for example, if the old wallpaper is so strongly bonded that removing it would cause significant damage to the plaster underneath. If you are contemplating this route, the existing wallpaper must meet every single one of the following criteria:
- It is a single, original layer. You should never wallpaper over a wall that already has multiple layers of paper.
- It is perfectly smooth. There can be no texture, embossing, or vinyl finish. A vinyl paper will not absorb paste and the new layer will not stick.
- It is flawlessly adhered. The paper must be bonded securely to the wall across its entire surface, with no lifting seams, peeling corners, or bubbles. Test this by trying to lift the edges in multiple places.
- The surface is not dark or heavily patterned. If you plan to hang a light-coloured wallpaper, a dark pattern underneath could show through, especially when wet with paste.
If your wall meets all these conditions, you must still prepare the surface. First, clean the old wallpaper thoroughly to remove any dirt or grease. Lightly sand any seams to make them as flush as possible. The most critical step is to seal the old wallpaper with an oil-based primer. This creates a barrier that prevents the moisture from the new paste from soaking into the old paper and weakening its adhesive. Once the primer is completely dry, you can proceed with hanging your new wallpaper. However, even with these precautions, the risk of failure remains. We recommend ordering a sample of your chosen design to test on a small, inconspicuous area first.
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Can You Wallpaper Over Painted Wallpaper?
Wallpapering over painted wallpaper combines the risks of both wallpapering over paint and wallpapering over wallpaper, making it the least advisable scenario of all. This situation presents a double layer of potential failure. You are not just relying on the old wallpaper's bond to the wall; you are also relying on the paint's bond to the old wallpaper. If either of these bonds is weak, your new wallpaper installation is destined to fail.
Paint applied over wallpaper can often hide underlying problems. There may be bubbles, lifting seams, or tears in the paper that are not visible under the coat of paint. The paint itself adds weight and, when you add the further weight of new wallpaper and wet paste, the combined stress can be too much for the original adhesive to handle, causing large sections to detach from the wall. Furthermore, the type of paint used is a critical factor. If it is a gloss or vinyl silk paint, it will create a non-porous surface that new wallpaper paste cannot adhere to without extensive sanding and priming, adding more work and more risk.
The only reliable and professional solution is to remove both the paint and the old wallpaper to get back to the bare wall. This will undoubtedly take more time and effort upfront, but it is the only way to guarantee a stable and sound surface for your new wall mural. Attempting to paper over this combination of layers is likely to result in a poor-quality finish and will ultimately create a much bigger and more difficult stripping job in the future. For a truly professional finish, especially with a premium product, there are no shortcuts. If you are unsure, our guide, Can You Paint Over Wallpaper?, explores the challenges of this surface in more detail.
How to Remove Old Wallpaper Before Installing a New Mural
Removing old wallpaper is a process that requires patience, but with the right tools and technique, it is a straightforward task that ensures the best possible canvas for your new mural.
Step 1: Prepare the Room
Before you begin, protect your room and yourself. Move furniture to the centre of the room and cover it with dust sheets. Lay protective sheets on the floor along the base of the walls. Use painter's tape to cover electrical sockets and light switches, and be sure to turn off the electricity to the room at the circuit breaker as a safety precaution against water getting into the electrics.
Step 2: Perforate the Wallpaper
If the old wallpaper is vinyl, washable, or has been painted over, its surface will be resistant to water. You need to create holes in it to allow your removal solution to penetrate through to the old adhesive. Use a wallpaper scoring tool, which has small rotating wheels that create tiny perforations without damaging the wall underneath. Run the tool over the entire surface of the wallpaper.
Step 3: Apply a Removal Solution
You have several options here. The simplest is a mixture of hot water and a small amount of washing-up liquid or vinegar. For more stubborn papers, a commercial wallpaper stripper solution can be more effective. Apply your chosen solution liberally with a large sponge or a paint roller, working in manageable sections from the top of the wall down. Let the solution soak in for 10-15 minutes to dissolve the old paste.
Step 4: Scrape and Peel
Once the paste has softened, the paper should come away easily. Start at a seam or a corner and use a wide wallpaper scraper or a putty knife to get under the edge. Try to peel off the paper in large sheets where possible. Be careful not to gouge the wall with your scraper. If the paper is resistant, apply more solution and wait a little longer. For very stubborn, multi-layered wallpaper, a wallpaper steamer can be highly effective, using steam to melt the old paste.
Step 5: Clean and Prepare the Wall
After all the paper is removed, the job is not finished. There will be residual adhesive left on the walls. Wash the walls thoroughly with your sugar soap or detergent solution to remove all traces of old paste. Once the wall is clean and completely dry, you can proceed with the standard preparation steps: fill any nicks or gouges, sand them smooth, and apply a coat of wallpaper primer.
Choosing the Right Primer for Your Wallpaper Project
Using the correct primer is a foundational step for a successful and long-lasting wallpaper installation. A primer, sometimes called 'size' in the context of wallpapering, is a special coating applied to the wall before the wallpaper. It creates an optimal surface that helps the wallpaper adhere better and, just as importantly, makes it easier to remove later on. Different situations call for different types of primer.
| Primer Type | Best For | Why It Works |
|---|---|---|
| Acrylic/Latex Primer. | Most situations, including bare plasterboard and previously painted walls. | Seals porous surfaces to prevent paste from drying too quickly and provides an excellent, even grip. |
| Wallpaper 'Sizing' Primer. | The standard, ideal preparation for any wallpaper job. | Specifically formulated to create a slightly tacky surface for better adhesion and easier positioning of panels. |
| Oil-Based Primer. | Problematic surfaces like stained walls, glossy paint, or sealing old wallpaper. | Blocks stains like water, ink, or smoke from bleeding through and creates a very strong moisture barrier. |
For most jobs where you are wallpapering over a sound, previously painted wall, a good quality acrylic or specific wallpaper primer is the best choice. It will seal the wall effectively and provide the perfect surface. An oil-based primer is more of a problem-solver. If you are concerned about stains bleeding through from the wall, or if you are taking the risk of wallpapering over a very well-adhered old wallpaper, an oil-based primer is essential. It creates an impermeable barrier, preventing moisture from the new paste from affecting the layer underneath. While you might see advice about using an oil based primer for painting over wallpaper, its role in preparing a surface for new wallpaper is primarily for sealing and stain blocking. Understanding how made to measure murals work from order to installation highlights why starting with the right foundation is so important.
Does the Type of Wallpaper Affect the Decision?
Yes, the type of wallpaper you plan to hang has a significant impact on how forgiving your wall preparation can be. The different materials and application methods offered by Casavono each have specific requirements for the surface they are applied to.
Peel & Stick wallpaper is perhaps the most demanding. Because it has a self-adhesive backing, it requires a perfectly smooth, clean, and well-primed wall to form a strong, lasting bond. Any texture, dust, or imperfection on the wall will prevent it from adhering properly and will be clearly visible through the material. It absolutely cannot be applied over any existing wallpaper, as it will not stick reliably and will highlight every single seam and flaw from the layer beneath. Our collection of Premium Peel and Stick Wallpaper Murals are designed for renters and DIY-ers, but their success hinges on a flawless wall surface.
Pre-Pasted wallpaper is activated with water. When you apply this type of paper over an existing wallpaper, the water can soak through and reactivate the old paste, leading to widespread bubbling and lifting. The moisture can cause the old paper to swell and then shrink as it dries, pulling at the seams and creating gaps. A clean, primed wall is the only way to ensure the water-activated paste bonds correctly and dries evenly.
Non-Pasted wallpaper uses a traditional paste-the-wall method, which creates the strongest bond of the three types. However, this strong bond also means it exerts the most tension on the surface as it dries. If that surface is an old layer of wallpaper, this tension can easily be enough to pull the old paper away from the wall, taking your new mural with it. A bold design like the Blue Cheetah Animal Mural demands a strong foundation; its dramatic impact would be lost if the surface beneath failed.
A Note on Dark Colours. When hanging a dark mural, such as the Black Damask Mural, over a light-coloured wall, consider using a grey-toned primer. This prevents any bright white wall colour from showing at the seams if minor gaps occur during installation.
Common Mistakes to Avoid When Wallpapering Over a Surface
Avoiding common pitfalls is key to a successful project. Here are some of the most frequent mistakes made when wallpapering over a previously decorated surface, and how to steer clear of them.
The first mistake is inadequate cleaning. It is easy to assume a wall is clean enough, but invisible layers of grease or dust can severely inhibit adhesion. Always wash the wall thoroughly and let it dry completely before doing anything else. Similarly, do not ignore small imperfections. A tiny nail hole or crack might seem insignificant, but it can create a noticeable dimple or line under the new wallpaper. Take the time to fill and sand every single flaw for a truly smooth finish.
A critical error is applying wallpaper to a glossy surface without proper preparation. Wallpaper paste simply cannot grip a shiny, non-porous surface. Sanding to de-gloss the paint and then applying a primer is not an optional step; it is essential for adhesion. Another time-related mistake is not respecting the curing time for new paint. As we have covered, applying wallpaper over uncured paint is a recipe for failure. Wait the full three to four weeks. Do not rush it.
When dealing with old wallpaper, the biggest mistake is making assumptions. Do not assume the paper is well-adhered just because it looks okay. Test the seams and corners. If you can lift it easily, it must be removed. Finally, a measurement mistake can be costly. Always measure your wall at its widest and tallest points and then add a little extra for trimming. Casavono recommends adding about 4 inches (10 cm) to both the final width and height to ensure you have enough material to account for uneven walls. Use our free online wallpaper calculator to ensure your measurements are accurate.
Why Proper Preparation Matters for a Made to Measure Mural
A made to measure mural is fundamentally different from a standard, repeating-pattern wallpaper. It is a single, large-scale piece of art that is custom printed to the exact dimensions of your wall. This bespoke nature means that the quality of the installation surface is paramount to the final effect. Unlike a small, repetitive pattern that can hide minor wall flaws, a mural's continuous image makes every imperfection underneath much more noticeable.
At Casavono, each mural is delivered in a set of numbered panels, typically 30 inches (76 cm) wide, that are rolled in hanging order. They are designed to be hung edge to edge without any overlap, creating one seamless picture. If there is a ridge from an old wallpaper seam or a bubble from trapped air underneath, it will disrupt the flow of the design. Imagine a delicate floral pattern like the Navy Dahlia Floral Mural being interrupted by a vertical line that is not part of the artwork; it would compromise the entire piece.
Investing in a high-quality, made to measure mural is an investment in transforming your space. Protecting that investment means giving it the best possible foundation. A perfectly smooth, clean, and uniformly primed wall ensures that every panel hangs perfectly, that the seams are invisible, and that the artwork looks exactly as it was intended. Taking the time to strip old wallpaper and prepare the wall surface correctly is not just about technical best practice; it is about honouring the artistry of the mural and ensuring it brings you joy for years to come. Explore our collection of all murals to see the stunning possibilities a perfect wall can hold.
More murals to consider
Blue Cheetah Animal MuralPrinted to your wall size
Cream Beach Landscape MuralPrinted to your wall size
Grey Stripe MuralPrinted to your wall size
Common questions
How long should I wait to wallpaper over new paint?
You must wait for the paint to fully cure, not just be dry to the touch. This chemical process can take time. We recommend waiting a minimum of three to four weeks after painting before applying any wallpaper to ensure a stable surface and prevent adhesive failure from trapped moisture.
Can I wallpaper over a textured wall?
No, you should not wallpaper directly over a textured wall, such as one with an orange peel or popcorn finish. The texture will show through the wallpaper, creating an uneven and unprofessional look. The wall must first be skim-coated with plaster and sanded completely smooth before priming and wallpapering.
What's the easiest way to tell if I can wallpaper over old wallpaper?
The easiest test is to find a seam or a corner, preferably in an inconspicuous area, and try to peel it back with a fingernail or a putty knife. If the paper lifts away easily, bubbles, or pulls the top layer of the wall with it, it must be completely removed.
Do I need a special primer to wallpaper over paint?
While you do not need an exotic product, using the right type of primer is crucial. A dedicated wallpaper primer (size) or a good quality acrylic wall primer is highly recommended. This seals the painted surface, promotes even adhesion, and makes future removal much easier. Do not use standard paint as a primer.
Can I use peel and stick wallpaper over existing wallpaper?
No. Peel and stick wallpaper requires a perfectly smooth, clean, and primed surface to adhere correctly. Applying it over existing wallpaper will result in a weak bond, and every seam, texture, or imperfection from the old layer will be visible through the new mural, ruining the finish.
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