Wallpapering remains one of the most transformative yet intimidating home improvement tasks for property owners. While the project can seem daunting at first glance, industry professionals and seasoned decorators emphasize that success relies almost entirely on meticulous preparation, correct measurements, and a clear understanding of the fundamental rules. Whether taking on a single feature wall or a complete room overhaul, approaching the process with a structured plan helps ensure a smooth, professional finish with minimal frustration.
How Much Wallpaper Will You Need?
Accurately estimating the amount of wallpaper required to finish a room involves several key factors beyond simply measuring the length and width of the chosen rolls. Patterned wallpaper, for example, inherently demands a larger material budget due to the natural waste generated when matching distinct designs across vertical seams. Standard wallpaper rolls typically measure 53 centimeters in width and 10 meters in length, making calculations straightforward once the room dimensions are established. However, even when working with non-standard roll dimensions, a straightforward mathematical approach prevents costly shortages or excessive surpluses.
The calculation begins by measuring the height of the walls from the skirting board to the ceiling or the bottom edge of the coving. Dividing the total length of a roll by this wall height reveals how many full wall lengths a single roll will yield. For instance, in a room with a 2.4-meter ceiling height, a standard 10-meter roll provides four usable wall lengths. Next, decorators must measure the perimeter of the room, subtracting the widths of doors and windows, to determine the total linear wall coverage required. Dividing this total perimeter measurement by the width of the wallpaper indicates how many individual strips are needed.
Dividing the total number of required strips by the yield per roll yields the exact number of rolls mathematically required to complete the space. To account for human error, trimming margins, and pattern matching, professionals consistently recommend purchasing additional rolls—often rounding up significantly from the raw mathematical total—to ensure the project is not compromised midway through completion. Alternatively, property owners frequently utilize digital wallpaper calculators provided by major hardware retailers to streamline the estimation process.
How to Choose Wallpapering Paste
Selecting the appropriate wallpaper paste is a critical decision that influences how securely the paper adheres and how easily it can be manipulated during hanging. Paste options generally fall into two categories: dry formulations sold as powders or flakes that require mixing with water, and pre-mixed pastes. While pre-mixed varieties command a higher price point, they offer added convenience and reliability for beginners who may struggle with achieving the correct consistency through manual mixing. Different weights and types of wallpaper—such as heavy vinyl, embossed textures, or delicate traditional papers—also demand specific paste formulations to ensure optimal bonding strength without damaging the material.
Tools You Will Need for Wallpapering
While the market offers hundreds of specialist wallpapering gadgets and accessories, a standard installation typically requires only a core set of reliable tools. At a minimum, decorators require a sharp utility knife or trimming scissors, a pasting table, a smooth wallpaper brush or smoothing tool, a plumb line or spirit level for establishing straight reference points, a measuring tape, and a seam roller. Having these foundational implements prepared before starting prevents unnecessary interruptions and helps maintain a steady workflow.
Preparation – Before You Start Hanging Wallpaper
Thorough preparation sets the stage for a seamless installation. Decorators begin by measuring the height of the room and adding approximately 100 millimeters to provide a generous margin for trimming at the top and bottom edges. For heavily patterned designs, allocating an even greater margin at both ends allows for necessary adjustments when aligning the pattern across adjacent strips. The first few strips should be cut and laid face down on a clean pasting table.
Simultaneously, the wall surface must undergo rigorous inspection. The application surface must be entirely clean, dry, and free from dust, protruding nails, or lingering holes from previous fixtures. For spaces featuring newly plastered walls, decorators must verify that the plaster skim coat has cured and dried completely before introducing any moisture-laden wallpaper paste, as trapped dampness will inevitably lead to lifting and bubbling later on.
How to Paste the Wallpaper
Applying wallpaper paste demands a methodical approach to ensure even coverage and proper conditioning of the paper. Once the paste is evenly applied to the reverse side of a cut strip, the paper must be allowed to soak according to the manufacturer’s instructions. This crucial waiting period allows the paper to expand fully before it is hung on the wall, preventing post-application wrinkling or shrinking.
To manage multiple strips efficiently without cluttering the workspace, decorators often drape pasted sheets over a broom handle suspended across the backs of two chairs, keeping the sticky surfaces safe from dust sheets and debris. While the first sheet rests and absorbs the moisture, a second sheet can be pasted, establishing an efficient rhythm where one piece is always soaking while the previous one is being hung.
Where Should You Start Wallpapering?
Determining the ideal starting point in a room depends heavily on architectural features. If the space features a dominant focal point, such as a chimney breast, decorators should begin there. By measuring the chimney breast and marking a straight vertical line down the center with a pencil or chalk, installers create a reliable reference edge, allowing them to hang the first strip centrally and work outward symmetrically.
In rooms lacking a prominent focal point, hanging should commence on the wall closest to the primary window. This strategic placement helps minimize the visibility of shadows cast by microscopic overlaps between adjacent wallpaper strips. Installers measure out from the corner by a distance equal to the width of the wallpaper minus 50 millimeters, using a plumb line to establish a vertical guideline. The first strip is then positioned along this line, allowing it to wrap neatly around the internal corner and overlap onto the window wall by 50 millimeters.
Hanging the First Sheet of Wallpaper
With the reference line established, the first sheet is carefully aligned and pressed gently against the wall using a smoothing brush, working from the center outward to expel trapped air pockets. The excess paper at the ceiling and skirting board is gently creased against the angles and trimmed using a sharp utility knife or scissors against a straight edge. Subsequent strips are hung by butting the edge precisely against the previously installed strip, using a seam roller delicately to secure the joints without squeezing excess adhesive onto the front of the paper.
Wallpapering Around Corners
Navigating internal and external corners requires distinct techniques to maintain a clean appearance and prevent future lifting. For internal corners, decorators typically wrap a narrow strip around the corner rather than attempting to force a full-width piece into a sharp ninety-degree angle, which often leads to tearing or misalignment. External corners are handled by wrapping the paper smoothly around the protrusion, ensuring adequate overlap to maintain tension and structural integrity as the adhesive dries.
Door and Windows
Reaching a doorframe requires pressing the paper firmly into the angle formed by the wall and the wooden architrave, creating a clean crease with the blunt edge of a pair of scissors. The paper is then pulled back slightly from the wall to allow for precise trimming along the crease before being brushed back into place. Windows demand a similar level of precision, particularly around recesses. Installers typically cover the sides of the window recess first, applying small, pre-cut patches to the top corners afterward to achieve a seamless, tailored finish around the frame.
How to Avoid Wallpapering Problems
Despite careful planning, wallpapering can present occasional challenges. Understanding how to diagnose and rectify common issues ensures a durable, professional outcome.
Paper tearing during handling or hanging typically indicates that the paper has absorbed an excessive amount of moisture or that the paste mixture is overly diluted. Thickening the paste and applying a more controlled quantity resolves this issue. Tearing during the cutting phase simply signals that the utility knife blade or scissors require replacement or sharpening.
Visible white seams after drying occur when sheets are not butted together tightly enough or when the paper has experienced natural shrinkage during the drying process. Ensuring proper soaking times prior to hanging, rolling seams with a seam roller, and applying lining paper to the walls beforehand effectively prevents this aesthetic flaw.
Bubbles trapped beneath the paper are generally caused by uneven paste distribution, excessive adhesive volume, or insufficient soaking time. Minor bubbles can be resolved by carefully piercing the paper with a knife blade to release trapped air or excess paste, flattening the area with a small amount of adhesive, and wiping the surface clean with a damp sponge.
Creases frequently appear when manipulating paper into tight corners and can similarly be treated using piercing and smoothing techniques. Meanwhile, lifting seams or entire sheets usually stem from failing to apply adhesive right up to the edges of the paper, omitting preparatory wall lining, or encountering residual distemper paint on older wall surfaces. Addressing these underlying factors by thoroughly washing affected walls, re-anchoring loose edges with an artist’s brush, and using proper lining materials ensures the long-term durability of the installation.
