White Horse Building Consultancy · Reviewed 7 September 2026
Build a picture of the problem
The history can help direct an investigation. Note when staining appears and whether it changes after rain or during colder periods. Photographs taken over time can show a useful pattern.
Tell the surveyor about previous repairs and alterations. Understanding what has already been tried helps place the current symptoms in context.
Consider the surrounding building
A damp area beneath a window may be connected with external weathering or another moisture source. Looking at the relevant construction helps connect the symptoms with a probable explanation.
Traditional solid walls manage moisture differently from modern cavity construction. The RICS joint guidance on moisture investigation emphasises understanding the building as a whole, which is important when considering repairs to older properties.
Interpret measurements in context
Moisture readings help investigate patterns, but a high reading alone does not establish rising damp. Materials and salts can influence the result, so the physical evidence matters.
Thermal observations can provide supporting information about surface temperatures. They are most useful when interpreted with the building construction and inspection conditions.
Choose an informed next step
If a rainwater defect is repeatedly wetting a wall, repairing that source may be the appropriate first step. The findings should explain why a recommendation is being made and what it is intended to address.
An independent report gives you advice to consider before spending on treatment. Send WHBC the property details and a brief history of the damp problem to discuss an inspection.