Wallpaper Installation: A Step by Step Professional Guide

Professional wallpaper installation involves preparing the wall surface meticulously, measuring accurately, and hanging each panel methodically using the correct tools. The process begins with creating a clean, smooth surface and marking a vertical guide line, ensuring a perfect finish from the first panel to the last.

What do I need for wallpaper installation?

For a successful wallpaper installation, you need a combination of measuring, cutting, and application tools. Having everything ready before you start prevents interruptions and helps you achieve a more professional result. The specific tools for applying the paper will vary slightly depending on the type you choose.

Essential tools for all wallpaper types:

• Tape measure
• Pencil
• Spirit level or plumb line
• Sharp utility knife with plenty of fresh blades
• Wallpaper smoothing tool or brush
• A clean, damp sponge
• Step ladder
• Dust sheets or floor protection

Additional tools based on paper type:

• For Non-Pasted wallpaper: A bucket for mixing paste, a paint roller or pasting brush, and a pasting table (optional, as you paste the wall).
• For Pre-Pasted wallpaper: A water tray large enough to submerge a panel, or a sponge and spray bottle.
• For Peel & Stick wallpaper: A plastic squeegee is often preferred over a brush for applying firm, even pressure.

Gathering all your equipment in the centre of the room on a dust sheet makes the process much more organised. A dull knife blade can tear the paper, so changing the blade frequently is one of the simplest ways to ensure clean, sharp cuts.

How to prepare a wall for wallpaper

Proper wall preparation is the foundation of any wallpaper project. A well-prepared surface ensures good adhesion and a flawlessly smooth finish. Skipping these steps can lead to bubbles, peeling, and visible imperfections through the paper.

First, the wall must be completely clean, dry, and structurally sound. Start by washing the wall with a sugar soap solution or a mild detergent to remove any dirt, grease, or grime. Rinse with clean water and allow it to dry completely. Next, inspect the surface for any damage. Fill any cracks, holes, or dents with a suitable filler. Once the filler is dry, sand it down until it is perfectly flush with the wall surface, then wipe away any dust.

You must remove any old wallpaper and any loose or flaking paint. If your walls have been freshly painted, you need to wait at least three to four weeks for the paint to fully cure. Applying wallpaper to uncured paint can cause bubbling as the paint off-gases. For a more detailed walkthrough, see our complete guide on how to prepare a wall for wallpaper.

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How do you measure a wall for wallpaper?

Accurate measurement is crucial, especially for made to measure products. An incorrect measurement can result in a design that doesn't fit your space. The correct method is to measure the total width and height of the wall at its widest and tallest points, ignoring any obstacles like doors, windows, or sloped ceilings.

Use a metal tape measure for accuracy. Measure the width from one corner to the other at the top, middle, and bottom of the wall, and take the largest of the three measurements. Do the same for the height, measuring from ceiling to floor on the left, in the centre, and on the right. Again, use the largest measurement. This ensures the mural will cover the entire surface, even if your walls are not perfectly square.

Once you have the maximum width and height, Casavono advises adding approximately 4 inches (10 cm) to both measurements. This extra material, known as bleed, provides a margin for error during hanging and allows for precise trimming to the exact contours of your wall, ceiling, and skirting boards. You can enter your final dimensions into our free online wallpaper calculator to see how your mural will be divided into panels.

Choosing the right wallpaper type

The type of wallpaper you choose affects both the installation process and the final result. Each paper has distinct characteristics suited to different environments and skill levels. Understanding these differences helps you select the best option for your project.

Casavono offers three PVC-free paper types, each with a specific application method. The choice depends on your room's conditions, such as humidity, and your comfort level with DIY projects.

For beginners, Premium Peel and Stick Wallpaper Murals are often the most approachable choice due to their forgiving, repositionable nature. For a permanent, classic finish in a living room, Non-Pasted paper provides maximum durability, perfect for designs like a sophisticated Ochre Dahlia Floral Mural. For rooms with more moisture, our Effortless Prepasted Wallpaper Murals offer a practical and beautiful solution.

How do u wallpaper? The step by step process

With your walls prepared and tools at hand, you are ready to begin the wallpaper installation. This process requires patience and precision. Working methodically, one panel at a time, is the key to achieving a professional look. Casavono murals are delivered in numbered panels, rolled in hanging order, making the sequence clear.

1. Step 1: Mark your starting line

   Never assume your wall corners are perfectly vertical. To ensure your first panel is straight, you must create a plumb line. Measure out from the left corner by 29 inches (74 cm), which is one inch less than the panel width of 30 inches (76 cm). Make a small pencil mark. Use your spirit level to draw a faint, perfectly vertical line from the ceiling to the floor through this mark. This will be the guide for the right edge of your first panel. The extra inch of paper will wrap around the corner, to be trimmed later.

2. Step 2: Prepare your first panel

   The preparation depends on your paper type. For Non-Pasted, use a roller or brush to apply a thin, even layer of wallpaper paste to the wall section where your first panel will hang. Apply paste slightly wider than the panel itself. For Pre-Pasted, lightly sponge the back of the panel with water or pass it through a water tray to activate the adhesive. For Peel & Stick, simply peel back the first 12 inches (30 cm) of the backing paper from the top of the panel.

3. Step 3: Hang the first panel

   Start at the top of the wall, leaving about 2 inches (5 cm) of excess paper overlapping the ceiling. Carefully align the right edge of the panel with the vertical plumb line you drew. Let the rest of the panel hang down. Once the edge is perfectly aligned with your guide line, gently press the top section of the panel onto the wall.

4. Step 4: Smooth out bubbles and wrinkles

   Using your wallpaper smoothing tool or a squeegee, work from the centre of the panel outwards to the edges. Apply gentle, firm pressure to push out any trapped air bubbles. Use diagonal strokes, moving from the centre towards the top, bottom, and side edges. For any stubborn bubbles, you can gently lift the paper back to the bubble and re-smooth. Wipe away any excess paste from the seams with a clean, damp sponge as you go.

5. Step 5: Hang subsequent panels

   Take your next numbered panel and align it with the edge of the previously hung panel. Casavono murals are designed to be hung with a butt joint, meaning the edges meet perfectly without any overlap. This creates a single, continuous image. Take your time to match the pattern at eye level first, then adjust the rest of the panel. Smooth it down just as you did with the first one, ensuring the seam is tight and clean. The effect is particularly striking with large-scale designs, such as a Terracotta Mountain Landscape Mural, where each panel is a crucial part of the whole view.

6. Step 6: Trim the excess

   Once all panels are hung and the adhesive is dry (check the paste manufacturer's instructions, but it's often best to trim when semi-dry), it's time to trim the excess paper at the ceiling, skirting board, and corners. Use a sharp utility knife and a straight edge, like a metal ruler or the back of your smoothing tool, to guide your cut. Press firmly for a clean line. Change your blade after every few cuts to prevent tearing.

How to do wallpapers around obstacles like sockets and switches

Wallpapering around obstacles like light switches, sockets, and thermostats requires careful cutting. It is a straightforward process if you follow the correct steps and always prioritise safety.

First and foremost, turn off the electricity to the corresponding circuits at your fuse box. Use a screwdriver to remove the faceplates from the sockets and switches on the wall you are papering. Hang the wallpaper panel directly over the obstacle as if it were not there, smoothing it down around the fixture. You will be able to feel its location through the paper.

Take your utility knife and make a small hole in the centre of the fixture. From this hole, make diagonal cuts outwards towards each corner of the fixture's back box, creating an 'X' shape. Be careful not to cut beyond the corners. This creates four triangular flaps. You can now carefully trim away these flaps along the edges of the back box. Smooth the paper down around the opening. Once the wallpaper is dry, you can screw the faceplates back on for a neat and professional finish.

How to wallpaper corners

Corners can seem challenging, but with the right technique, you can achieve a crisp and clean result. The method differs slightly for internal (concave) and external (convex) corners.

For an internal corner, smooth the panel right into the corner. With a Casavono mural, the panels are pre-cut, so you will simply hang the next numbered panel on the adjacent wall, aligning its edge with the corner.

For an external corner, the process is similar. Hang the panel so that it wraps around the corner by about one inch (2.5 cm). Make small release cuts at the top and bottom if needed to help it lie flat. Smooth it down firmly on both sides of the corner. Then, hang the next panel on the adjacent wall, again aligning it with the corner for a perfect butt joint. The pre-cut panels of a mural make this alignment process much simpler than matching a repeating pattern from a traditional roll.

What are the most common wallpapering mistakes to avoid?

Avoiding common mistakes is as important as following the correct steps. Being aware of these potential pitfalls can save you time, frustration, and materials, ensuring your wallpaper with installation looks its best.

• Inadequate Wall Preparation: This is the most frequent error. Hanging wallpaper on a bumpy, dirty, or damp wall will result in a poor finish and potential adhesion failure. Always take the time to clean, fill, sand, and prime your walls.
• Ignoring the Plumb Line: Many DIYers are tempted to use a wall corner or window frame as a guide for their first panel. These are rarely perfectly straight. Always use a spirit level to create a true vertical plumb line.
• Overstretching the Paper: When trying to align patterns or eliminate bubbles, it's easy to pull and stretch the wallpaper, especially when it's wet. This can distort the pattern and cause seams to open up as the paper dries and shrinks back. Smooth gently, do not stretch.
• Overlapping Seams: Unless the manufacturer's instructions specifically state otherwise, modern wallpapers are designed to be hung with butt joints (edges meeting perfectly). Overlapping creates a visible ridge. Casavono murals must never be overlapped, as it would disrupt the single continuous image.
• Using a Dull Blade: A dull utility knife blade will not cut cleanly; it will tear and chew the paper, resulting in ragged edges. Change your blade often, ideally for every new wall or after several long cuts.

Choosing a made to measure mural, such as a lush botanical wallpaper, can help you avoid one other common issue: complex pattern matching. Since the mural is printed as one image across numbered panels, you simply hang them in order without worrying about calculating pattern repeats. Learn more about how ordering a made to measure mural works.

Wallpaper and installation: professional vs DIY

Deciding whether to hang wallpaper yourself or hire a professional decorator is a key consideration. The choice depends on the complexity of the job, your budget, and your own DIY confidence and experience.

Hiring a professional is often the best choice for complex spaces with many obstacles (like multiple doors, windows, or alcoves), very high ceilings, or if you have chosen a particularly delicate or expensive wallpaper. A professional has the experience to handle challenges efficiently and guarantees a high-quality finish. It provides peace of mind.

Doing it yourself (DIY) is a rewarding option, especially for a single feature wall or a simple, rectangular room. It gives you complete control over the project timeline. With modern products like Peel & Stick and Pre-Pasted papers, wallpapering is more accessible to beginners than ever. Casavono murals are designed to be DIY-friendly; the panels are a manageable 30 inches (76 cm) wide and are clearly numbered for hanging order. Following a detailed step by step installation guide can empower you to achieve a result you can be proud of, transforming a serene bedroom wallpaper project into a satisfying weekend task.

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