Category: Credit: Oliver Wright

Underside of traditional peg tiles hung on split battens.

Degraded pitch tar coating to timber cladding.

Inside of an octagonal turret roof with central post.

Structural insulated panel (SIP). Brick slip adhesion failure.

Corrosion and delamination of beam flange.

Pattress plates on an external flank wall to provide additional lateral restraint at floor level.

Rigid damp proof course (DPC) circa 1875. Terracotta blocks also provide ventilation to the subfloor.

Spray foam insulation applied directly to the underside of a 1F underfelt. Suspect electrical installation is also a fire hazard.

Darkening and cuboidal cracking in timber caused by brown rot.

Thermal ghosting and thermophoresis to a ceiling. Also known as pattern staining.