Category: Credit: Oliver Wright

Darkening and cuboidal cracking in timber caused by brown rot.

Thermal ghosting to a ceiling. This is type of discolouration is also known as pattern staining.

Frost damage and delamination of aggregate to a concrete soffit.

Corrosion of steel reinforcement and spalling of cover concrete.

Calcium silicate brickwork. The darker areas are where crack repairs have been undertaken.

Resilient bars and acoustic mineral wool insulation to a ceiling.