Guildford splits between Victorian and Edwardian stock around the town centre and Charlotteville — clay peg tiles and Welsh slate, with steep pitches on the hillside streets — and large 1930s and post-war estates at Merrow, Burpham and Onslow Village on concrete tiles. The chalk ridge of the Hogs Back exposes south-western approaches to driven rain, and heavy tree cover in Onslow and along the Wey towpath keeps valleys and gutters blocking every autumn. Clay hanging tiles on gable ends are a local repair speciality worth confirming a contractor has handled.