The appearance is not a diagnosis
A damp wall can be affected by condensation, water penetration, plumbing or moisture left after an earlier event. Painting over it does not establish which explanation applies. The pattern and history matter.
Describe changes through the day
Explain whether the patch changes with heating, water use or weather. Mention previous repairs and nearby plumbing. These observations help shape a relevant investigation without expecting you to diagnose the cause.
Know the boundary of a plumbing visit
Our investigation assesses whether water pipework contributes to the problem. A wider building or ventilation assessment may be more appropriate if the evidence points elsewhere. Drying and decorating are separate from repairing a leaking pipe.
Related service
Plumbing-related damp investigation explains the practical investigation and the scope to discuss before booking.
For agreed residential work, the Exact Source package is £1,400, including applicable tax. Necessary access, plumbing repair, materials, suitable checks and a Trace & Access report are included. Decorative and remedial reinstatement is excluded.