Shrewsbury's roofing stock splits three ways: timber-framed and Georgian buildings inside the river loop (many within the town centre conservation area, where like-for-like materials are usually required), Victorian terraces in Castlefields and Belle Vue on plain clay tiles and Welsh slate, and post-war estates such as Monkmoor, Harlescott and Radbrook on concrete interlocking tiles now reaching nail-fatigue age. The Severn loop brings persistent damp air: moss growth on north-facing slopes is the most common maintenance call, and flood-adjacent streets see more frequent gutter and fascia decay than the county average.