- Pattern repeat
- The vertical (or sometimes horizontal) distance before a printed pattern repeats itself along the roll.
- Straight match
- A pattern that lines up straight across from one roll to the next, at the same height.
- Offset match (drop match)
- A pattern that only lines up correctly when the next roll is shifted up or down by a set amount.
- Free match
- A pattern with no need to align rolls to each other, since the design repeats randomly or has no clear repeat point.
- Drop
- One cut length of wallpaper, sized to the wall height plus a trim allowance.
- Batch or lot number
- A code printed on the roll label showing which production run it came from. Colour can vary slightly between batches.
- GSM
- Grams per square metre, a measure of how heavy and thick the material is.
- Non-woven
- A material made of pressed natural and synthetic fibres, rather than woven cloth or pulped paper.
- Sizing / primer
- A coating applied to a wall before papering, to even out absorption and help later removal.
- Butt seam
- Where two wallpaper edges meet edge to edge, without overlapping.
- Overlap-and-double-cut
- A technique where two edges are overlapped, then cut through both layers together, for a tight, close-to-invisible join.
- Lining paper
- A plain paper hung first to even out a rough or uneven wall, before the final wallpaper goes on.
- Breathable
- A material that lets moisture vapour pass through it, rather than sealing the wall completely.
- Washable vs scrubbable
- Washable tolerates a gentle wipe with a damp cloth. Scrubbable tolerates firmer cleaning with a brush or sponge.