How Much Extra Wallpaper Should You Buy?

Buy extra wallpaper after checking the roll width, wall height, pattern repeat and the way strips will be laid out. A room can have enough square metres on paper but still need more rolls because matching the pattern and cutting around openings creates unusable pieces.

What increases the requirement

• A pattern repeat that requires additional length on every strip.
• Wall height close to or greater than the roll length.
• Niches, bays, sloping corners and many short sections.
• A pattern that cannot be turned or reused in the opposite direction.
• A few spare strips needed for future local repairs or a discontinued collection.

Estimate the allowance from the layout

Measure each wall, determine the number of strips and account for the repeat and end cuts. Convert the result to rolls using the dimensions of the specific collection, then round up. A simple layout with a small repeat wastes differently from a complex room with a large pattern.

Why openings do not always reduce the count

Short pieces above and between doors or windows may not be interchangeable with full strips when the pattern must line up. Subtract openings only after considering the strip layout, rather than removing their area automatically from every room.

Use one batch when possible

Check the batch number, shade, roll width and repeat before cutting. Keep the label and a few offcuts for repairs; a later roll may not match the original colour or pattern.

Connect the estimate to your wall measurements

Map the walls, doors, windows and niches first, then use the wall area and wallpaper calculators as planning tools. This avoids subtracting openings twice and helps you verify the roll count against the actual cutting plan.