How to Hang Unpasted Wallpaper: A Complete Guide for a Flawless Finish

Wallpaper has made a strong comeback in modern interior design. From bold feature walls to subtle textured finishes, it offers a level of depth and character that paint alone cannot achieve. Among the various types available, unpasted wallpaper remains a popular choice because of its durability, flexibility, and premium finish.

However, installing unpasted wallpaper is not as simple as peeling and sticking. Unlike pre-pasted or self-adhesive wallpaper, unpasted wallpaper requires manual adhesive application and precise handling. This guide breaks down the process, highlights common mistakes, and explains when professional installation is the smarter investment.

Unpasted wallpaper is a traditional type of wall covering that does not come with adhesive pre-applied to the backing. Instead, paste must be manually applied either to the wallpaper itself or directly onto the wall, depending on the manufacturer’s instructions.

This type of wallpaper is often thicker and more durable than peel-and-stick options. It is commonly used for high-end finishes, textured designs, fabric-backed vinyl, and intricate patterns that require precision alignment.

Because it offers strong adhesion and long-term durability, unpasted wallpaper is widely preferred for living rooms, bedrooms, hallways, and commercial feature walls. However, proper preparation and technique are essential to achieve a smooth, bubble-free result.

Steps to Install Wallpaper on a Painted Wall

1. Preparing the Wall Properly

Successful wallpaper installation begins long before the first sheet is applied. Wall preparation is critical, and skipping this stage can compromise the entire project.

The wall surface must be clean, dry, and smooth. Dust, grease, or residue will interfere with adhesion and may cause peeling over time. Any holes or cracks should be filled and sanded to create an even surface.

If the wall has been previously painted with gloss or semi-gloss paint, lightly sanding it helps the adhesive bond more effectively. In some cases, applying a wallpaper primer is recommended to improve adhesion and make future removal easier.

2. Measuring and Cutting with Precision

Accurate measurements are essential when working with unpasted wallpaper. Each strip must be cut slightly longer than the wall height to allow trimming at the top and bottom.

Pattern alignment is especially important when using decorative or repeating designs. Failing to account for pattern repeat can lead to mismatched seams and wasted material.

Before applying the paste, it is advisable to dry-fit each strip to confirm alignment. This extra step helps prevent costly mistakes and ensures a professional-looking finish.

3. Applying Adhesive Correctly

One of the defining features of unpasted wallpaper installation is the manual application of adhesive. The paste must be evenly spread across the entire backing using a brush or roller.

Uneven paste distribution can cause bubbles, lifting edges, or weak adhesion. Applying too much adhesive may lead to excess seepage at the seams, while too little may result in peeling.

After applying paste, many installers use a process called “booking,” where the wallpaper is gently folded paste-to-paste and left to rest briefly. This allows the adhesive to activate and the paper to expand slightly before placement.

4. Hanging and Aligning the Wallpaper

The first strip sets the tone for the entire installation. It must be perfectly vertical, which is why using a level or plumb line is critical.

Carefully position the strip at the top of the wall and allow it to hang naturally. Using a smoothing tool, gently press from the centre outward to remove air bubbles and ensure even adhesion.

Subsequent strips must be aligned carefully at the seams. Tight seams create a seamless appearance, but overlapping should be avoided unless specifically required by the product.



Common Mistakes in DIY Wallpaper Installation

DIY wallpaper projects often encounter avoidable issues. One common mistake is inadequate wall preparation, which can lead to peeling or uneven texture visibility.

Another frequent problem is air bubbles caused by improper smoothing or uneven paste application. If not addressed immediately, bubbles can dry into permanent imperfections.

Misaligned patterns are also a significant concern. Even a slight miscalculation can disrupt the entire visual effect, particularly with bold or geometric designs.

Why Professional Installation Delivers Better Results

While DIY installation may seem cost-effective, professional wallpaper installers bring experience, tools, and technical knowledge that significantly improve results.

Professionals understand how different wallpaper materials behave during installation. They know how much expansion to expect and how to adjust techniques accordingly.

Their expertise ensures precise alignment, clean trimming, and durable adhesion. This reduces the risk of future peeling, bubbling, or seam separation.

Removing Old Wallpaper Safely

Before installing new wallpaper, existing wall coverings often need to be removed. Improper removal can damage drywall or leave adhesive residue that affects the new installation.

Professional wallpaper removal techniques involve controlled moisture application and careful scraping. This preserves the wall surface and prepares it properly for the next layer.

Attempting aggressive removal without proper tools can result in gouges, torn plasterboard, and additional repair costs.

When to Consider Professional Help

Wallpaper installation can quickly become complex, especially with textured materials, fabric-backed vinyl, or large feature walls. High ceilings, stairwells, and curved surfaces require additional precision.



If you are investing in premium wallpaper, professional installation protects that investment. The cost of correcting a failed DIY attempt often exceeds the cost of hiring experts initially.

Commercial spaces, including offices and retail environments, also benefit from professional installation to ensure a polished, brand-consistent appearance.

How SYD Wallpaper Helps Homeowners and Businesses

SYD Wallpaper specialises in professional wallpaper installation and removal services across Sydney. Whether you are upgrading a residential feature wall or refreshing a commercial interior, their team ensures precision and durability.

They handle a wide range of wallpaper types, including unpasted wallpaper, vinyl wallpaper, textured finishes, fabric-backed options, and designer prints. Each project begins with proper surface preparation to guarantee optimal adhesion and a flawless finish.

For clients replacing outdated designs, SYD Wallpaper also provides safe and efficient wallpaper removal. Their careful techniques protect wall integrity and prepare surfaces for new installations without unnecessary damage.

By combining technical expertise with attention to detail, SYD Wallpaper delivers clean seams, accurate pattern matching, and long-lasting results.

The Value of Professional Wallpaper Services

Wallpaper is an investment in aesthetics and atmosphere. When installed correctly, it can transform a space, add character, and elevate property value.

Professional installation ensures longevity. Proper alignment and adhesive application reduce maintenance issues and extend the lifespan of the wallpaper.

For businesses, professionally installed wallpaper contributes to brand image and customer perception. A well-finished interior communicates quality and professionalism.

Final Thoughts

Unpasted wallpaper offers a durable and elegant wall covering solution, but it requires careful preparation, precise adhesive application, and meticulous alignment. While DIY installation may be suitable for small or simple projects, complex designs and premium materials benefit greatly from professional expertise.

Avoid the frustration of bubbles, misaligned seams, or damaged walls. Investing in skilled installation ensures your wallpaper looks stunning from day one and remains secure for years to come.

Ready to Transform Your Walls?

If you are planning a wallpaper project, trust the experts at SYD Wallpaper. We offer professional wallpaper installation and removal services for different types of wallpaper, ensuring flawless finishes for both residential and commercial spaces.

Contact SYD Wallpaper today to discuss your project and experience the difference that professional craftsmanship makes.