Macclesfield
The centre is silk-era terrace and a great deal of it is pre-1919, which means Welsh slate on original iron nails — so nail sickness and slipped slates are the bread and butter here. The terraces are built hard against the pavement edge, so a scaffold usually stands on the highway and needs a licence. Add the conservation areas across the town and the material you re-cover in becomes a planning question, not just a preference.