Wallpaper Repeat, Trimming and the Last Roll

Start with a full strip

A strip must span the wall height represented by the estimate. Trimming adds length at the top and bottom. Enter the total allowance for those ends, rather than adding the same value twice without noticing.

The chosen wallpaper then determines whether adjacent strips can be matched freely or need a repeated alignment. Use the actual match information, not a guess based on whether the pattern looks busy.

Compare two matching rules on the same wall

Consider an illustrative wall 4 m wide and 2.2 m high. With a 0.53 m roll width, it needs eight strips. Assume a usable roll length of 10.05 m and 0.1 m total trim.

With free matching, each strip is 2.3 m long and four complete strips fit in a roll. Two rolls provide eight strips. With a user-entered 0.64 m straight repeat, each strip rounds to 2.56 m, only three fit in a roll, and the purchase rises to three rolls.

A leftover length is not automatically another strip

After cutting complete strips, the remaining roll length may be too short for the wall. Its area still exists, but an area-only calculation cannot tell you whether it supplies a usable full-height piece.

This is also why a small wall opening does not automatically remove its area from the roll purchase. Material above and beside it may still need the same pattern alignment. PackLedge does not optimise those individual cuts.

Check what the model does not reserve

The strip estimator does not add an unentered starting alignment loss before the first strip. Check the usable roll length and any starting allowance required by your product. It also does not assume a seam overlap that you have not specified.

Half-drop matching, alternating A/B rolls and custom murals use different planning rules. A straight-match setting should not be used as a convenient substitute for them.

Keep the roll specification with the result

Save width, usable length, match type, repeat and trim alongside the wall measurements. A roll count without those details is difficult to reuse when a product changes.

For several wall heights, the calculator keeps different effective strip lengths in separate conservative groups. That makes the arithmetic reviewable, but it is not a promise of the fewest possible rolls or a complete hanging plan.

Frequently asked questions

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