Pattern repeat
Large repeats and directional designs can increase waste and labour, adding 10–25% to the installed rate.
Wall preparation
Filling, sanding and sealing defective backgrounds typically adds £6–£18/m², with full skim repairs priced separately.
Lining paper
Cross-lining before the finished covering generally adds £12–£22/m².
Room complexity
Frequent reveals, corners, radiators and service fittings can increase hanging costs by £8–£20/m².
Wallcovering value
Premium, imported or natural-fibre products can add £25–£100/m² or more through material cost and handling risk.
Access and phasing
High walls, stairwells, occupied areas or fragmented visits can increase the rate by 15–35%.