Wallpaper Over Wallpaper? DIY Guide & When to Avoid

So, you’re staring at that outdated wallpaper, maybe something floral your Aunt Mildred picked out, and the thought of stripping it fills you with dread? The allure of simply slapping new paper on top, perhaps something from Graham & Brown’s latest collection, is strong; but before you grab your Stanley knife and start measuring, hold on a sec. The question of "can you install wallpaper over wallpaper" isn’t a simple yes or no, and ignoring prep work, like using the right Roman Pro-977 Ultra Prime, could lead to a bumpy, peeling disaster. Let’s walk through the realities of wallpapering over existing wallpaper, exploring when it works and, more importantly, when you should absolutely call in a professional from, say, your local Wallpaper Installers of America chapter.

The Great Wallpapering Debate: To Cover or Remove?

The siren song of a quick renovation often leads homeowners to a pivotal question: can you really just wallpaper over existing wallpaper? The thought of skipping the arduous task of removal is undeniably appealing. It conjures visions of weekends saved, energy conserved, and a swift transformation achieved.

The Allure of Layering: Time vs. Trouble

The temptation to wallpaper over wallpaper stems from a very human desire: efficiency. Wallpaper removal is rarely a fun task. It’s often messy, time-consuming, and physically demanding. Covering it up seems like a genius shortcut.

It appears to offer instant gratification, bypassing hours of scraping, steaming, and patching. Plus, there’s the perceived cost savings. Why invest in removal tools, solutions, and potential wall repairs when you can simply apply a fresh layer?

However, this shortcut isn’t always the most effective path, and it’s essential to understand the potential trade-offs.

Setting Realistic Expectations: Proceed with Caution

Before you grab your wallpaper paste and roller, it’s crucial to understand that wallpapering over wallpaper is not a guaranteed success. It’s not a universal solution, and it comes with potential pitfalls that can haunt you later.

Think of it like building on a shaky foundation. If the existing wallpaper is loose, damaged, or improperly adhered, the new layer will inherit those flaws. Bubbling, peeling, and seam separation can emerge, turning your quick fix into a long-term headache.

The Unsung Hero: The Case for Wallpaper Removal

While covering up offers a seductive shortcut, wallpaper removal remains a valid – and often superior – alternative. It’s the foundational approach, allowing you to start with a clean, stable surface.

Removing the old wallpaper ensures proper adhesion for the new layer, minimizes the risk of moisture entrapment, and allows you to address any underlying wall imperfections. It might require more effort upfront, but the long-term benefits often outweigh the initial inconvenience.

Ultimately, the decision to cover or remove boils down to a careful assessment of your specific situation and a willingness to prioritize quality over convenience.

Understanding the Risks: The Potential Pitfalls of Layering Wallpaper

[The Great Wallpapering Debate: To Cover or Remove?
The siren song of a quick renovation often leads homeowners to a pivotal question: can you really just wallpaper over existing wallpaper? The thought of skipping the arduous task of removal is undeniably appealing. It conjures visions of weekends saved, energy conserved, and a swift transformation…]

But hold on, before you grab that roll of new wallpaper and slather on the paste, it’s crucial to understand that covering existing wallpaper is not without its risks. It’s a bit like building a house on shaky foundations – the end result might look good initially, but underlying problems can quickly surface, leading to a far bigger headache (and expense) down the road.

The Adhesion Predicament

At the heart of the matter lies adhesion. The new wallpaper needs to properly grip the surface beneath. If the existing wallpaper isn’t firmly attached, or if it has a vinyl coating that resists paste, the new layer simply won’t adhere well. This can lead to air pockets, unsightly bumps, and eventually, peeling.

Imagine trying to stick tape to a dusty surface – it just won’t hold. The same principle applies here. A clean, sound base is essential for a successful wallpaper application.

The Moisture Monster: Mold and Mildew Concerns

Another significant risk is trapped moisture. Wallpaper, especially in areas with high humidity like bathrooms or kitchens, can act as a barrier.

If moisture gets behind the new wallpaper layer, it can become trapped between the two layers, creating a breeding ground for mold and mildew. This not only damages your walls but also poses a serious health hazard.

Ignoring potential moisture issues is simply asking for trouble.

The Unpleasant Aesthetics: Bubbles, Peeling, and Seam Separation

Even if you manage to get the new wallpaper to stick initially, cosmetic issues can arise over time. Bubbling is a common problem, caused by uneven adhesion or air pockets. Peeling is another possibility, especially at seams or corners.

Seam separation, where the edges of the wallpaper begin to lift, can also occur due to the added weight and stress on the wall.

These aesthetic issues can quickly turn your dream renovation into a homeowner’s nightmare. You could even spend extra on Wallpaper Smoothing Tools only to prolong the inevitable.

The Weighty Issue: Structural Strain

Finally, consider the added weight on the wall. Multiple layers of wallpaper can put a strain on the underlying structure. This is particularly concerning if your walls are already weak or damaged.

Over time, the added weight can cause the wallpaper to sag, crack, or even pull away from the wall entirely. Think of it like overloading a shelf – eventually, it will buckle under the pressure.

Before committing to wallpapering over wallpaper, carefully weigh these risks. It might be tempting to cut corners, but in the long run, proper preparation (including removal of the old wallpaper) is often the safer and more cost-effective option. Sometimes, the best solution requires a little more elbow grease upfront.

Wall Assessment: Is Your Wall Suitable for Wallpapering Over?

Before even thinking about slapping new wallpaper over old, a thorough wall assessment is absolutely critical. This isn’t a step to be skipped or rushed. Think of it as a pre-flight checklist for your wallpapering project – ensuring a safe and successful "takeoff."

The success of your wallpapering endeavor hinges on the integrity of the existing surface. We need to critically examine the existing wallpaper, as well as the wall beneath. Let’s dive into the key areas of inspection.

Examining the Existing Wallpaper: A Forensic Investigation

First, turn your attention to the existing wallpaper. Your goal is to understand its condition, what it’s made of, and how its design might impact the new layer.

Condition: Is It Firmly Adhered, Smooth, and Clean?

This is the first and perhaps most crucial test. Are there loose edges, bubbles, or peeling sections? Any of these issues are red flags. Weak adhesion in the existing wallpaper will guarantee problems later, potentially leading to both layers detaching from the wall.

A smooth surface is equally important. Bumps, ridges, or even embedded debris will telegraph through the new wallpaper, resulting in an unprofessional and unsightly finish.

Finally, cleanliness matters. Dirt, grease, or stains can compromise the adhesion of the new wallpaper and potentially create mold issues later on.

Type: Identifying Wallpaper Varieties

Wallpaper comes in various materials, each with different characteristics. Common types include vinyl, paper, fabric-backed, and non-woven. Vinyl wallpaper, with its moisture resistance, presents a unique challenge.

Wallpaper is difficult to breathe as it’s usually not porous. It’s more resilient but can hinder the breathability of the wall, potentially trapping moisture underneath if the wall isn’t properly prepared. Paper wallpaper, on the other hand, tends to be more breathable, but is generally more delicate.

Understanding the type of wallpaper you’re dealing with will inform your choice of primer, adhesive, and application techniques.

Pattern: Heavily Textured or Dark? (Bleed-Through Concerns)

The pattern of the existing wallpaper also plays a role. Heavily textured wallpapers will create an uneven surface. This will compromise the smooth finish of the new layer. Dark colors can sometimes bleed through lighter wallpapers, especially if the new wallpaper is thin or translucent.

Consider testing a small, inconspicuous area with a sample of your new wallpaper to assess potential bleed-through issues before committing to the entire project.

Checking the Walls Themselves: Unveiling Hidden Issues

Beyond the existing wallpaper, the condition of the underlying wall is paramount. You’re looking for signs of structural problems or moisture.

Are They Structurally Sound?

Check for cracks, holes, or crumbling plaster. These issues need to be addressed before any wallpapering takes place. Attempting to wallpaper over damaged walls is a recipe for disaster, potentially exacerbating the existing problems and leading to further structural damage.

Are There Any Signs of Moisture Damage?

This is perhaps the most critical question. Water stains, discoloration, or a musty odor are all telltale signs of moisture intrusion. Wallpapering over a damp wall is an absolute no-go. It will trap moisture, creating a breeding ground for mold and mildew. This is a health hazard, and it will ruin your wallpaper.

Address any moisture issues completely before even considering wallpapering. This might involve fixing leaks, improving ventilation, or installing a moisture barrier.

In conclusion, a meticulous wall assessment is the cornerstone of a successful wallpapering project. By carefully examining the existing wallpaper and the underlying wall structure, you can make an informed decision about whether wallpapering over is a viable option. If you have any doubts or concerns, it’s always best to consult with a professional wallpaper installer. Your walls (and your wallet) will thank you in the long run.

Essential Prep Work: Setting the Stage for Success (or Damage Control)

Before even thinking about slapping new wallpaper over old, a thorough wall assessment is absolutely critical. This isn’t a step to be skipped or rushed. Think of it as a pre-flight checklist for your wallpapering project – ensuring a safe and successful "takeoff."

The success of wallpapering over existing wallpaper hinges almost entirely on the preparation. Neglecting this phase is akin to building a house on a shaky foundation; it might look good initially, but it’s destined for trouble. So, let’s dive into the nitty-gritty of prepping your walls for their new decorative layer.

The Importance of a Clean Slate

First things first: cleanliness is non-negotiable. Think of the existing wallpaper as a magnet for dust, grime, and all sorts of airborne pollutants.

Applying new wallpaper over this gunk is a recipe for disaster.

You need to remove any loose particles, grease, or other contaminants that could hinder adhesion.

A simple solution of warm water and mild detergent, applied with a sponge, usually does the trick. Remember to rinse thoroughly and allow the wall to dry completely before proceeding.

Addressing Imperfections: Patching and Smoothing

Even seemingly minor imperfections can become glaringly obvious under a fresh layer of wallpaper.

Now’s the time to fix them.

Small holes and cracks should be filled with spackle or joint compound, smoothed over, and allowed to dry completely.

For larger imperfections, you might need to use a more substantial patching compound. Sanding down any bumps or uneven surfaces is also crucial for creating a smooth, uniform base.

The Indispensable Role of Wallpaper Primer

Wallpaper primer isn’t just another product to add to your shopping list; it’s a critical component of a successful wallpapering project.

It acts as a bridge between the old wallpaper and the new, promoting adhesion and preventing issues down the road.

Why Primer is Essential for Adhesion

Existing wallpaper can be a tricky surface to adhere to. It may be porous, non-porous, or even have a sheen that resists adhesive.

Primer creates a uniform, receptive surface that allows the new wallpaper to bond properly. This reduces the risk of bubbling, peeling, and other adhesion-related problems.

Priming to Seal Patterns and Create Uniformity

Existing patterns or colors can bleed through the new wallpaper, especially if it’s a lighter color or thinner material.

Primer acts as a barrier, sealing in the old pattern and preventing it from showing through. It also creates a uniform surface, minimizing any visual inconsistencies caused by the underlying wallpaper.

Primer and Adhesive Compatibility: A Crucial Test

Not all primers and adhesives are created equal. Some combinations may work well together, while others can lead to adhesion problems or even damage to the wallpaper.

Before you commit to a full-scale wallpapering project, it’s essential to test the compatibility of your chosen primer and adhesive.

Apply a small amount of primer to an inconspicuous area of the wall and let it dry completely. Then, apply a small piece of wallpaper using your chosen adhesive and allow it to set.

After 24-48 hours, check for any signs of adhesion problems, such as bubbling, peeling, or lifting. If everything looks good, you can proceed with confidence. If not, you’ll need to experiment with different primer and adhesive combinations until you find one that works.

Before even thinking about slapping new wallpaper over old, a thorough wall assessment is absolutely critical. This isn’t a step to be skipped or rushed. Think of it as a pre-flight checklist for your wallpapering project – ensuring a safe and successful "takeoff."

The following are steps to hanging wallpaper on wallpaper.

Step-by-Step Guide: How to Wallpaper Over Wallpaper (If You Dare!)

So, you’ve assessed the risks, prepped the walls, and decided to brave the world of wallpapering over wallpaper? Alright, proceed with caution! This step-by-step guide will walk you through the process, but remember, no guarantees are implied. Let’s get started.

Gathering Your Arsenal: The Essential Tools & Materials Checklist

Before you even think about slinging adhesive, make sure you have everything you need. A well-stocked toolkit will save you countless trips back and forth, minimizing frustration and maximizing efficiency.

Here’s a comprehensive checklist:

• New Wallpaper: Obviously! Choose a pattern and material appropriate for your space.
• Wallpaper Primer: Absolutely crucial for adhesion. Don’t skimp on this.
• Wallpaper Adhesive/Paste: Select one compatible with your chosen wallpaper.
• Measuring Tape: For accurate cuts, every time.
• Pencil: For marking measurements on the wallpaper backing.
• Smoothing Brush or Plastic Smoother: To eliminate air bubbles.
• Seam Roller: To ensure edges are tightly sealed.
• Utility Knife or Razor Blade: For precise trimming.
• Straight Edge or T-Square: A metal ruler also works.
• Paste Brush or Roller (if using paste): For applying the adhesive.
• Water Bucket and Sponge: For wiping away excess paste.
• Drop Cloth: Protect your floors from drips and spills.
• Ladder or Step Stool: If you’re tackling a tall wall.
• Seam roller: To make sure edges are sealed.

Priming the Wall: Laying the Groundwork for Adhesion

As mentioned earlier, priming is non-negotiable. It creates a stable surface for the new wallpaper to adhere to, seals any lingering patterns on the old wallpaper, and helps prevent moisture issues.

Apply an even coat of wallpaper primer to the entire surface of the existing wallpaper. Use a brush or roller, ensuring you cover every inch. Allow the primer to dry completely according to the manufacturer’s instructions. Patience is key here! Rushing this step will only lead to problems down the road.

Measuring and Cutting: Precision is Your Friend

Accurate measurements are essential to avoid wasting wallpaper and ending up with unsightly gaps or seams.

Measure the height of your wall and add a few extra inches to both the top and bottom for trimming. Roll out your wallpaper on a clean, flat surface and transfer the measurement using your measuring tape and pencil. Use a straight edge and utility knife to make a clean, precise cut. Repeat for each strip of wallpaper, carefully matching the pattern as you go.

Pro Tip: Number each strip on the back in the order you plan to hang it. This will prevent any pattern-matching mishaps.

Applying Adhesive: The Sticky Situation

Follow the manufacturer’s instructions for applying the wallpaper adhesive. If you’re using pre-pasted wallpaper, simply activate the paste with water according to the instructions.

If you’re using traditional paste, apply it evenly to the back of the wallpaper strip using a paste brush or roller. Be generous but avoid over-saturating the paper. Fold the pasted sides together (paste-to-paste) and let it "book" for the recommended amount of time. This allows the paste to activate properly and prevents the edges from drying out too quickly.

Hanging the Wallpaper: Alignment and Smoothing are Key

Carefully unfold the top half of the booked wallpaper strip and align it with the top of your wall, allowing the extra inches to overlap the ceiling. Gently press the wallpaper against the wall, using your smoothing brush or plastic smoother to work out any air bubbles.

Work from the center outwards, applying even pressure. Unfold the bottom half of the wallpaper strip and repeat the process, aligning the pattern with the previous strip. Take your time and double-check for alignment.

The Smoothing Process

Smoothing is essential for a professional finish. Use a smoothing brush or plastic smoother to remove any air bubbles or wrinkles. Work from the center of the wallpaper outwards towards the edges. If adhesive seeps out, wipe it away immediately with a damp sponge.

Trimming: Achieving a Clean Edge

Once the wallpaper is securely in place, use your utility knife or razor blade and a straight edge to trim the excess wallpaper at the top and bottom. Make sure your blade is sharp for a clean, crisp cut.

Seaming: A Seamless Transition

Pay close attention to the seams between each strip of wallpaper. Use a seam roller to firmly press the edges together, ensuring a tight and seamless transition. Wipe away any excess adhesive with a damp sponge.

Pro Tip: For tricky seams, consider using a seam adhesive for extra hold.

Congratulations! You’ve (hopefully) successfully wallpapered over wallpaper. Step back and admire your work (and hope it stays up!). Remember to keep an eye on those seams and be prepared to address any issues that may arise. And, seriously, consider removal next time!

[Before even thinking about slapping new wallpaper over old, a thorough wall assessment is absolutely critical. This isn’t a step to be skipped or rushed. Think of it as a pre-flight checklist for your wallpapering project – ensuring a safe and successful "takeoff."
The following are steps to hanging wallpaper on wallpaper.
Step-by-Step Gu…]

Knowing When to Call a Pro: Recognizing Your Limits

Let’s be honest. Wallpapering, even under the best circumstances, can be tricky. Deciding to wallpaper over existing wallpaper adds another layer of complexity, and frankly, another layer of potential disaster. While the DIY spirit is admirable, there are definitely times when calling in a professional wallpaper installer isn’t just a good idea – it’s absolutely essential. Recognizing your limits can save you time, money, and a whole lot of frustration.

Identifying the Red Flags: Complex Situations Demand Expert Help

So, how do you know when to throw in the towel and call a pro? Look for these warning signs:

• Uneven Walls: A Nightmare Foundation

  If your walls are riddled with bumps, dents, or other imperfections, wallpapering over them is just going to amplify those issues. A professional can properly prepare the surface to create a smooth, even base.

• Multiple Layers of Old Wallpaper: The Leaning Tower of Paste

  Think of it: layers upon layers of wallpaper. Each layer adds weight and stress to the wall, increasing the risk of peeling, bubbling, and, ultimately, a complete collapse of your wallpapering dreams. Professionals have the tools and experience to safely remove multiple layers.

• Signs of Moisture Intrusion: A Breeding Ground for Mold

  Never, ever wallpaper over a wall that shows signs of moisture damage.

  This isn’t just a cosmetic issue; it’s a health hazard. Trapped moisture can lead to mold growth, which can cause serious respiratory problems. A professional can identify the source of the moisture and recommend appropriate remediation before any wallpaper goes up.

The Value of Expert Advice: Avoiding Costly Mistakes

Beyond just handling tricky situations, a professional wallpaper installer brings a wealth of knowledge and experience to the table.

They can assess your walls, recommend the best type of wallpaper for your specific needs, and ensure a flawless installation that will last for years to come.

Think of it as an investment: You might pay more upfront, but you’ll avoid the costly mistakes and potential damage that can result from a DIY gone wrong.

Wallpaper Removal: Sometimes It’s the Only Sensible Option

Here’s the truth: in some cases, wallpapering over existing wallpaper is simply not an option.

If the existing wallpaper is peeling, heavily textured, or damaged in any way, removal is the only way to achieve a professional-looking result. A professional will have the correct tools such as a Paper Tiger Scoring Tool, and proper techniques to effectively remove the old wallpaper without damaging the underlying wall. They also know how to properly prepare the wall surface for new wallpaper, ensuring optimal adhesion and a long-lasting finish.

Bottom Line: Don’t let a false sense of confidence or a desire to save a few bucks lead you down a path of wallpapering regret. When in doubt, call a professional. Your walls (and your sanity) will thank you.

Design Considerations: Aesthetic Implications

Before even thinking about slapping new wallpaper over old, a thorough wall assessment is absolutely critical.

This isn’t a step to be skipped or rushed.

Think of it as a pre-flight checklist for your wallpapering project – ensuring a safe and successful "takeoff."

The decision to wallpaper over existing wallpaper isn’t just about practicality; it’s a design choice with potential aesthetic repercussions.

Interior designers approach this situation with a keen eye, understanding that layering patterns and textures can either elevate a space or create a visual disaster.

Here’s what they consider:

The Layering Effect: A Designer’s Dilemma

The biggest challenge is predicting how the existing wallpaper will interact with the new layer.

Will the old pattern subtly bleed through, creating an unwanted ghosting effect?

Will the colors clash, resulting in a jarring and disharmonious look?

Designers carefully consider the opacity of the new wallpaper.

A thin, light-colored wallpaper over a dark, bold pattern is generally a recipe for visual chaos.

They also assess the existing pattern’s scale.

A large, dominant pattern underneath can overwhelm a smaller, more delicate pattern on top.

Ultimately, the goal is to create a cohesive and visually appealing result, not a cluttered and confusing mess.

It is imperative to fully and completely consider the aesthetic implications before moving forward.

The Texture Factor: Weighing Thickness and Depth

Textured wallpaper adds another layer of complexity.

Applying new wallpaper over existing textured wallpaper can create an uneven surface, potentially compromising the final appearance.

Consider the combined thickness.

Too much texture can make a wall look heavy and dated, instead of the otherway around.

It’s crucial to ensure the new wallpaper’s texture complements, rather than competes with, the old.

A smooth wallpaper over a heavily textured one might highlight imperfections, while a heavily textured wallpaper might mask them – or, worse, exaggerate them.

Careful consideration of texture compatibility is essential for achieving a professional and aesthetically pleasing outcome.

Color Bleed and Pattern Show-Through

One of the most common problems when wallpapering over existing wallpaper is color bleed.

Dark colors from the existing wallpaper can seep through the new layer.

Additionally, patterns can show through, creating a distracting and undesirable effect.

To mitigate these issues, designers often recommend using a high-quality primer specifically designed to block stains and patterns.

This primer acts as a barrier, preventing the underlying colors and patterns from interfering with the new wallpaper’s design.

The Long-Term View: Maintenance and Removal

Finally, designers consider the long-term implications.

Wallpapering over existing wallpaper can make future removal a nightmare.

Multiple layers of wallpaper can be incredibly difficult and time-consuming to remove, potentially damaging the underlying walls.

Therefore, designers often advise against wallpapering over wallpaper unless it’s a temporary solution or if the existing wallpaper is in excellent condition and perfectly smooth.

Cost Analysis: Is It Truly More Cost-Effective?

Before even thinking about slapping new wallpaper over old, a thorough wall assessment is absolutely critical. This isn’t a step to be skipped or rushed. Think of it as a pre-flight checklist for your wallpapering project – ensuring a safe and successful "takeoff." The decision to wallpaper over, at first glance, seems like a budget-friendly shortcut. But is it really? Let’s dive into the real costs, both financial and otherwise, to help you make an informed decision.

The Initial Price Tag: Wallpapering Over vs. Removal

When you first crunch the numbers, covering existing wallpaper seems cheaper. You save on wallpaper removal tools (strippers, scrapers, steamers), disposal bags, and potentially the labor costs of hiring a professional remover.

New wallpaper, primer, adhesive – these are the basics you’d need regardless. So, at face value, you’re dodging a significant expense.

But wait! This initial saving can quickly evaporate if things go south.

The Hidden Costs of Cutting Corners

The true cost comparison isn’t just about the materials upfront. It’s about the potential for problems down the line.

Poor adhesion can lead to bubbling and peeling, forcing you to redo the entire job. This doubles your material costs and wipes out any initial savings.

Moisture trapped behind the layers can breed mold, leading to costly remediation. And that’s on top of the health risks.

A failed wallpaper-over attempt might even damage the underlying wall surface, requiring patching and repairs before you can even think about properly installing new wallpaper.

The Time Investment: A Double-Edged Sword

Wallpapering over wallpaper can be faster initially. But if you factor in the potential for mistakes, the extra prep work needed to ensure a good bond, and the risk of having to redo everything, that time saving advantage quickly diminishes.

Think about it: removing old wallpaper properly might take a weekend, but doing it wrong could cost you weeks of frustration and extra work.

Labor Costs: DIY vs. The Pros

If you’re a seasoned DIY enthusiast, you might be comfortable tackling either wallpapering over or wallpaper removal yourself. But for most homeowners, wallpapering, in general, might require a professional installer. If you attempt the DIY route for wallpapering over, and it fails, you might end up paying even more to have a professional fix your mistakes and then install the wallpaper correctly.

Hiring a professional wallpaper remover and installer might seem like a significant investment upfront, but it often saves you money (and headaches) in the long run by ensuring the job is done right the first time.

The Mistake Multiplier: When Good Intentions Go Bad

Let’s be honest: even with careful preparation, wallpapering over wallpaper is inherently riskier than starting with a clean slate. If you make a mistake – bubbles, misaligned seams, etc. – the consequences are amplified. You’re not just dealing with the cost of replacing a single strip of wallpaper, you’re potentially facing a complete do-over, including the added cost of removing both layers.

This is where the "shortcut" becomes a costly detour.

Making the Informed Decision

Ultimately, the cost-effectiveness of wallpapering over wallpaper depends on several factors: the condition of your existing walls and wallpaper, your DIY skills, and your tolerance for risk.

While the initial savings might be tempting, it’s crucial to weigh the potential hidden costs and long-term consequences. In many cases, investing in proper wallpaper removal upfront is the more cost-effective choice in the long run. It provides a solid foundation for a beautiful and lasting wallpaper installation, without the worry of underlying problems bubbling to the surface—literally.

So, can you install wallpaper over wallpaper? Sometimes! Just remember to prep right, test a small area first, and be honest about the condition of that existing layer. If in doubt, or if things start to go south, don’t be afraid to call in a pro – a perfectly smooth wall is always worth the investment. Happy decorating!