Surface condition
Extensive scraping, fungicidal treatment and local filling typically add £5–£14/m².
Additional coat
A third full coat generally adds £4–£7/m², subject to colour and application method.
Access provision
Allocated scaffold, tower or powered-access costs can add £6–£25/m² depending on height, duration and utilisation.
Exposure and height
Wind restrictions, coastal exposure and high-level working can increase the painting rate by 10–30%.
Colour change
Strong colour changes, deep bases or low-opacity shades commonly add £2–£6/m² through extra material and labour.
Scale and phasing
Large continuous elevations may reduce rates by 10–15%, while repeated mobilisation or short phases can add 15–30%.