Guided starting point

Damp patch on an internal wall

I have found a damp patch. Which reviewed explanations should I compare first?

Scope of this guided route

This proof route compares two reviewed explanations for internal damp staining: penetrating damp through solid walls and condensation on cold surfaces. It does not diagnose a particular property.

Guide structure reviewed by Savas Bulduk BSc (Hons) MRICS, Director & Chartered Building Surveyor · last reviewed 2026-07-23. Each linked topic shows its own evidence and review details.

1
Start with the visible symptom
- Visible symptomDamp staining on internal walls or ceilingsRead this topic
2
Compare the selected explanations
- Defect termPenetrating damp through solid masonry wallsRead this topic
- Defect termCondensation and mould on cold surfacesRead this topic
3
Use the approved after-survey path
- After-survey decisionLevel 3 found significant dampRead this topic

How this guide is put together

This page connects a focused set of reviewed library entries. Its question, scope and route were technically reviewed; it does not replace the evidence, limitations or detail on the linked pages.

Recommended next step

The proportionate instruction depends on the building, the concern and what an inspection can reasonably establish. HCS confirms the scope before you book.

Speak to a surveyor first

We confirm the proportionate instruction before quoting.

Also consider

Instruct a RICS Level 3 Building Survey — Detailed survey for older, altered, listed, non-standard or defective London property.
Not sure Level 2 or Level 3? Use the survey chooser — Use the live HCS tool for an indicative comparison, then confirm the scope before instruction.
Instruct a building pathology / defect survey — Cause-led diagnosis for a defined damp, leak, crack or fabric problem — not a full purchase survey.

Ask a surveyor

Not sure what this means for your property? Speak with a Chartered Surveyor atHampstead Chartered Surveyors & Building Consultancy.

General library guidance is not a survey of your building. A short conversation helps confirm the proportionate next step.

Request advice Book inspection Discuss survey findings

From Survey Findings to Remedial Design, Tendering & Execution

Once our RICS chartered building surveyors have diagnosed the root cause of a defect through a Specific Defect & Building Pathology Investigation or RICS Home Survey, you can either instruct Hampstead Chartered Surveyors independently for JCT Contract Administration to tender the works to external contractors, or elect our joined-up group design-and-build route alongside our sister practices:

Hampstead Architecture & Planning: Architectural drawings, conservation-area and listed-building consents, structural engineering coordination, and Building Regulations packages translated directly from the survey diagnostics.
Hampstead Renovations: Principal contractor remedial execution, heritage masonry and roofing repairs, damp and timber remediation, and full residential refurbishments backed by £5M public liability, £10M employers' liability and contractors' all risks cover alongside Hampstead Chartered Surveyors' RICS-regulated Professional Indemnity Insurance (PII).

RICS Impartiality Note: Where Hampstead Chartered Surveyors acts as independent JCT Contract Administrator or Party Wall Surveyor, works are tendered strictly to independent third-party contractors in accordance with RICS conflict-of-interest governance.

Request a Specific Defect Inspection or Post-Survey Fee Quote

All fees are quoted transparently plus VAT (Specific Defect & Building Pathology inspections from £595 plus VAT).