Wallcovering Roll Takeoff With Pattern Repeat
The rolls of wallcovering from the wall perimeter, height, and pattern repeat: full-height strips across the perimeter, one repeat wasted per strip to match the run, strips per roll, and rolls. A large repeat can nearly double the order for the same area. Roll size is the product's bolt size and openings are a manual credit - a material takeoff, not a hang plan.
Formula and source
strips_needed = ceil(perimeter_in / roll_width_in); strip_len_in = height_in + repeat_in; strips_per_roll = floor(roll_len_in / strip_len_in); rolls = ceil(strips_needed / strips_per_roll).
First-principles strips-and-rolls relations with wallcovering industry estimating practice (the strip method and the one-repeat-per-strip waste rule, by name); no edition cycle.
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